10.1007/s40089-022-00372-2

A comprehensive review on biodiesel production from microalgae through nanocatalytic transesterification process: lifecycle assessment and methodologies

  1. Department of Polymer and Process Engineering, IIT Roorkee, Roorkee, Uttarakhand, 247667, IN

Published in Issue 2022-06-07

How to Cite

Mittal, V., Talapatra, K. N., & Ghosh, U. K. (2022). A comprehensive review on biodiesel production from microalgae through nanocatalytic transesterification process: lifecycle assessment and methodologies. International Nano Letters, 12(4 (December 2022). https://doi.org/10.1007/s40089-022-00372-2

Abstract

Abstract Biodiesel, a viable alternative fuel is a methyl esters of fatty acids that has gained considerable attention in recent years due to the increasing carbon emissions and exhausting conventional fossil fuels. The most significant criteria for effective biodiesel production are feedstock and catalyst selection. Microalgae is an ideal feedstock for biodiesel production due to its rapid growth and high lipid content. Nanocatalysts are increasingly applied in biofuel production due to its high surface area, catalytic activity and reusability. The present work is striving to explore the mechanism and application of nanocatalysts for biodiesel production through the transesterification process. The synthesis methods, spectral and structural properties using characterization techniques, regeneration and reuse of nanocatalyst are discussed. Along with nanocatalyst modification, the role of optimization parameters such as methanol to oil molar ratio, catalyst loading, reaction temperature and time in enhancing the biodiesel yield are offered. The physical properties of microalgae-based biodiesel through nanocatalytic transesterification were studied and compared with the conventional diesel based on international standards.

Keywords

  • Microalgae,
  • Biodiesel,
  • Nanocatalyst,
  • Transesterification,
  • Lipid,
  • Fatty acid methyl esters (FAME)

References

  1. Dixit et al. (2021) Thermal buffering performance of a propyl palmitate/expanded perlite-based form-stable composite: experiment and numerical modeling in a building model https://doi.org/10.1021/acs.energyfuels.0c03553
  2. Dixit et al. (2022) Salt hydrate phase change materials: current state of art and the road ahead https://doi.org/10.1016/j.est.2022.104360
  3. Gautam et al. (2021) Assessment of different organic substrates for bio-electricity and bio-hydrogen generation in an integrated bio-electrochemical system https://doi.org/10.1016/j.matpr.2021.06.223
  4. Liu et al. (2008) Calcium methoxide as a solid base catalyst for the transesterification of soybean oil to biodiesel with methanol (pp. 1076-1082) https://doi.org/10.1016/j.fuel.2007.05.059
  5. Kaur and Ali (2011) Lithium ion impregnated calcium oxide as nano catalyst for the biodiesel production from karanja and jatropha oils (pp. 2866-2871) https://doi.org/10.1016/j.renene.2011.04.014
  6. Teo et al. (2016) Algae derived biodiesel using nanocatalytic transesterification process (pp. 362-370) https://doi.org/10.1016/j.cherd.2016.04.012
  7. Faried et al. (2017) Biodiesel production from microalgae: processes, technologies and recent advancements (pp. 893-913) https://doi.org/10.1016/j.rser.2017.05.199
  8. Abubakar et al. (2020) Bioremediation science and technology biodiesel production using Helianthus annuus (Sunflower) seed oil by trans-esterification method (pp. 24-27) https://doi.org/10.54987/bstr.v8i2.555
  9. Xie et al. (2021) Sustainable biodiesel production from low-quantity oils utilizing H6PV3MoW8O40 supported on magnetic Fe3O4/ZIF-8 composites (pp. 927-937) https://doi.org/10.1016/j.renene.2020.12.129
  10. Ambat et al. (2018) Recent advancement in biodiesel production methodologies using various feedstock: a review (pp. 356-369) https://doi.org/10.1016/j.rser.2018.03.069
  11. Karmakar et al. (2010) Properties of various plants and animals feedstocks for biodiesel production (pp. 7201-7210) https://doi.org/10.1016/j.biortech.2010.04.079
  12. Constituency (2020) Evaluation of technical efficiency of edible oil production: the case of canola production in Kieni West Constituency, Kenya (pp. 59-66) https://doi.org/10.5897/JDAE2019.1127
  13. Almasi et al. (2021) A novel approach for bio-lubricant production from rapeseed oil-based biodiesel using ultrasound irradiation: multi-objective optimization https://doi.org/10.1016/j.seta.2020.100960
  14. Teo et al. (2014) Transesterification of Nannochloropsis oculata microalga’s oil to biodiesel using calcium methoxide catalyst (pp. 63-71) https://doi.org/10.1016/j.energy.2014.07.045
  15. Istadi et al. (2015) Characterization of K2O/CaO-ZnO catalyst for transesterification of soybean oil to biodiesel (pp. 394-399) https://doi.org/10.1016/j.proenv.2015.01.056
  16. Gendy and El-Temtamy (2013) Commercialization potential aspects of microalgae for biofuel production: an overview (pp. 43-51) https://doi.org/10.1016/j.ejpe.2012.07.001
  17. Banerjee et al. (2019) Fe2O3 nanocatalyst aided transesterification for biodiesel production from lipid-intact wet microalgal biomass: a biorefinery approach (pp. 844-853) https://doi.org/10.1016/j.enconman.2019.05.060
  18. Amit and Ghosh (2018) An approach for phycoremediation of different wastewaters and biodiesel production using microalgae (pp. 18673-18681) https://doi.org/10.1007/s11356-018-1967-5
  19. Akubude et al. (2019) Production of biodiesel from microalgae via nanocatalyzed transesterification process: a review (pp. 216-225) https://doi.org/10.1016/j.mset.2018.12.006
  20. Ansari et al. (2019) Techno-economic estimation of wastewater phycoremediation and environmental benefits using Scenedesmus obliquus microalgae (pp. 293-302) https://doi.org/10.1016/j.jenvman.2019.03.123
  21. Sanford, S., White, J., Shah, P.: Feedstock and biodiesel characteristics report. Renewable Energy Group, pp. 1–136 (2009)
  22. Zhang et al. (2013) Biodiesel production from heterotrophic microalgae through transesterification and nanotechnology application in the production (pp. 216-223) https://doi.org/10.1016/j.rser.2013.05.061
  23. Kabaivanova et al. (2020) Biotechnological exploitation of lignocellulosic wastes for biomethane production and algae cultivation in the digestate (pp. 152-157) https://doi.org/10.18178/ijpmbs.9.4.152-157
  24. Ndukwe et al. (2020) Mechanisms of weak acid-induced stress tolerance in yeasts: Prospects for improved bioethanol production from lignocellulosic biomass (pp. 118-130) https://doi.org/10.1016/j.procbio.2019.11.009
  25. Spolaore et al. (2006) Commercial applications of microalgae (pp. 87-96) https://doi.org/10.1263/jbb.101.87
  26. Chen et al. (2018) The potential of microalgae in biodiesel production (pp. 336-346) https://doi.org/10.1016/j.rser.2018.03.073
  27. Chew et al. (2017) Microalgae biorefinery: high value products perspectives (pp. 53-62) https://doi.org/10.1016/j.biortech.2017.01.006
  28. Deshpande Sarma and Anand (2012) Status of nano science and technology in India (pp. 99-126) https://doi.org/10.1007/s40011-012-0077-2
  29. Kumar and Ali (2010) Nanocrystalline lithium ion impregnated calcium oxide as heterogeneous catalyst for transesterification of high moisture containing cotton seed oil (pp. 2091-2097) https://doi.org/10.1021/ef901318s
  30. Mofijur et al. (2020) Effect of nanocatalysts on the transesterification reaction of first, second and third generation biodiesel sources—a mini-review https://doi.org/10.1016/j.chemosphere.2020.128642
  31. Tamjidi et al. (2021) Performance of functionalized magnetic nanocatalysts and feedstocks on biodiesel production: a review study https://doi.org/10.1016/j.jclepro.2021.127200
  32. Narasimhan et al. (2021) Heterogeneous nanocatalysts for sustainable biodiesel production: a review https://doi.org/10.1016/j.jece.2020.104876
  33. Atiqah et al. (2021) A review on the utilization of calcium oxide as a base catalyst in biodiesel production https://doi.org/10.1016/j.jece.2021.105741
  34. Singh et al. (2020) Review article A review on feedstocks, production processes, and yield for different generations of biodiesel https://doi.org/10.1016/j.fuel.2019.116553
  35. Athar and Zaidi (2020) A review of the feedstocks, catalysts, and intensification techniques for sustainable biodiesel production https://doi.org/10.1016/j.jece.2020.104523
  36. Deshmukh et al. (2019) Microalgae biodiesel: a review on oil extraction, fatty acid composition, properties and effect on engine performance and emissions (pp. 232-247) https://doi.org/10.1016/j.fuproc.2019.03.013
  37. Nguyen et al. (2019) Recent advanced applications of nanomaterials in microalgae biorefinery https://doi.org/10.1016/j.algal.2019.101522
  38. Dhawane et al. (2018) Recent advancement and prospective of heterogeneous carbonaceous catalysts in chemical and enzymatic transformation of biodiesel (pp. 176-202) https://doi.org/10.1016/j.enconman.2018.04.073
  39. Chen et al. (2017) Valorization of biomass to hydroxymethylfurfural, levulinic acid, and fatty acid methyl ester by heterogeneous catalysts (pp. 246-273) https://doi.org/10.1016/j.cej.2017.07.020
  40. Baskar and Aiswarya (2016) Trends in catalytic production of biodiesel from various feedstocks (pp. 496-504) https://doi.org/10.1016/j.rser.2015.12.101
  41. Verma and Sharma (2016) Review of process parameters for biodiesel production from different feedstocks (pp. 1063-1071) https://doi.org/10.1016/j.rser.2016.04.054
  42. Lee et al. (2015) Recent nanoparticle engineering advances in microalgal cultivation and harvesting processes of biodiesel production: a review (pp. 63-72) https://doi.org/10.1016/j.biortech.2014.10.145
  43. Luo et al. (2014) Ultrasound-enhanced conversion of biomass to biofuels (pp. 56-93) https://doi.org/10.1016/j.pecs.2013.11.001
  44. Ramachandran et al. (2013) Recent developments for biodiesel production by ultrasonic assist transesterification using different heterogeneous catalyst: a review (pp. 410-418) https://doi.org/10.1016/j.rser.2013.01.057
  45. Lin et al. (2011) Opportunities and challenges for biodiesel fuel (pp. 1020-1031) https://doi.org/10.1016/j.apenergy.2010.09.029
  46. Sun et al. (2019) Microalgae biodiesel production in China: a preliminary economic analysis (pp. 296-306) https://doi.org/10.1016/j.rser.2019.01.021
  47. Gaurav et al. (2017) Utilization of bioresources for sustainable biofuels: a review (pp. 205-214) https://doi.org/10.1016/j.rser.2017.01.070
  48. Hassan and Kalam (2013) An overview of biofuel as a renewable energy source: development and challenges (pp. 39-53) https://doi.org/10.1016/j.proeng.2013.03.087
  49. Elshahed (2010) Microbiological aspects of biofuel production: current status and future directions (pp. 103-111) https://doi.org/10.1016/j.jare.2010.03.001
  50. Doshi et al. (2016) Economic and policy issues in the production of algae-based biofuels: a review (pp. 329-337) https://doi.org/10.1016/j.rser.2016.06.027
  51. Correa et al. (2017) Biodiversity impacts of bioenergy production: Microalgae vs. first generation biofuels (pp. 1131-1146) https://doi.org/10.1016/j.rser.2017.02.068
  52. Binod et al. (2019) Enzymes for second generation biofuels: recent developments and future perspectives (pp. 317-325) https://doi.org/10.1016/j.biteb.2018.06.005
  53. Feyzi et al. (2013) Preparation and characterization of Cs/Al/Fe3O4 nanocatalysts for biodiesel production (pp. 62-68) https://doi.org/10.1016/j.enconman.2013.03.022
  54. Nayebzadeh et al. (2018) Fabrication of carbonated alumina doped by calcium oxide via microwave combustion method used as nanocatalyst in biodiesel production: Influence of carbon source type (pp. 566-575) https://doi.org/10.1016/j.enconman.2018.05.081
  55. Zhang et al. (2021) Synthesis of the SrOeCaOeAl2O3 trimetallic oxide catalyst for transesteri fi cation to produce biodiesel (pp. 981-990) https://doi.org/10.1016/j.renene.2020.12.132
  56. Baskar et al. (2018) Biodiesel production from castor oil using heterogeneous Ni doped ZnO nanocatalyst (pp. 793-798) https://doi.org/10.1016/j.biortech.2017.12.010
  57. Baskar and Soumiya (2016) Production of biodiesel from castor oil using iron (II) doped zinc oxide nanocatalyst (pp. 101-107) https://doi.org/10.1016/j.renene.2016.02.068
  58. Hu et al. (2011) Nano-magnetic catalyst KF/CaO-Fe3O4 for biodiesel production (pp. 2685-2690) https://doi.org/10.1016/j.apenergy.2011.02.012
  59. Baskar et al. (2017) Optimization and kinetics of biodiesel production from Mahua oil using manganese doped zinc oxide nanocatalyst (pp. 641-646) https://doi.org/10.1016/j.renene.2016.10.077
  60. Talapatra et al. (2021) A comparative study of the growth of microalgae-bacteria symbiotic consortium with the axenic culture of microalgae in dairy wastewater through extraction and quantification of chlorophyll https://doi.org/10.1016/j.matpr.2021.06.227
  61. Sakthivel et al. (2011) Microalgae lipid research, past, present: a critical review for biodiesel production, in the future (pp. 29-49)
  62. Gouveia et al. (2009) Neochloris oleabundans UTEX #1185: a suitable renewable lipid source for biofuel production (pp. 821-826) https://doi.org/10.1007/s10295-009-0559-2
  63. Gim et al. (2014) Comparison of biomass production and total lipid content of freshwater green microalgae cultivated under various culture conditions (pp. 99-106) https://doi.org/10.1007/s00449-013-0920-8
  64. Rodríguez et al. (1989) We are IntechOpen, the world ’ s leading publisher of Open Access books Built by scientists, for scientists TOP 1% (pp. 137-144)
  65. Kalavathy and Baskar (2019) Synergism of clay with zinc oxide as nanocatalyst for production of biodiesel from marine Ulva lactuca (pp. 234-238) https://doi.org/10.1016/j.biortech.2019.02.101
  66. Vinoth Arul Raj et al. (2019) Biodiesel production from microalgae Nannochloropsis oculata using heterogeneous Poly Ethylene Glycol (PEG) encapsulated ZnOMn2+ nanocatalyst (pp. 348-352) https://doi.org/10.1016/j.biortech.2019.03.030
  67. Jawaharraj et al. (2017) Improved biomass and lipid production in Synechocystis sp. NN using industrial wastes and nano-catalyst coupled transesterification for biodiesel production (pp. 128-132) https://doi.org/10.1016/j.biortech.2017.03.067
  68. Barros et al. (2015) Harvesting techniques applied to microalgae: a review (pp. 1489-1500) https://doi.org/10.1016/j.rser.2014.09.037
  69. Aziz et al. (2020) Two-stage cultivation strategy for simultaneous increases in growth rate and lipid content of microalgae: a review https://doi.org/10.1016/j.rser.2019.109621
  70. Hsieh and Wu (2009) Cultivation of microalgae for oil production with a cultivation strategy of urea limitation (pp. 3921-3926) https://doi.org/10.1016/j.biortech.2009.03.019
  71. Ugwu et al. (2008) Photobioreactors for mass cultivation of algae (pp. 4021-4028) https://doi.org/10.1016/j.biortech.2007.01.046
  72. Review, M.M.: Cascade photobioreactor for waste water treatment by microalgae. In: Application of Microalgae in Wastewater Treatment, vol.
  73. XXV
  74. , pp. 17–29 (2020)
  75. Narala et al. (2016) Comparison of microalgae cultivation in photobioreactor, open raceway pond, and a two-stage hybrid system (pp. 1-10) https://doi.org/10.3389/fenrg.2016.00029
  76. Ortiz et al. (2021) Optimization and operation of a demonstrative full scale microalgae harvesting unit based on coagulation, flocculation and sedimentation https://doi.org/10.1016/j.seppur.2020.118171
  77. Kiran et al. (2014) Perspectives of microalgal biofuels as a renewable source of energy (pp. 1228-1244) https://doi.org/10.1016/j.enconman.2014.06.022
  78. Ogbonna and Nwoba (2021) Bio-based flocculants for sustainable harvesting of microalgae for biofuel production. A review https://doi.org/10.1016/j.rser.2020.110690
  79. Uduman et al. (2010) Dewatering of microalgal cultures: a major bottleneck to algae-based fuels https://doi.org/10.1063/1.3294480
  80. Divakaran and Sivasankara Pillai (2002) Flocculation of algae using chitosan (pp. 419-422) https://doi.org/10.1023/A:1022137023257
  81. Zhou et al. (2017) Bio-mitigation of carbon dioxide using microalgal systems: advances and perspectives (pp. 1163-1175) https://doi.org/10.1016/j.rser.2017.03.065
  82. Molina Grima et al. (2003) Recovery of microalgal biomass and metabolites: process options and economics (pp. 491-515) https://doi.org/10.1016/S0734-9750(02)00050-2
  83. Lee et al. (2020) Techniques of lipid extraction from microalgae for biofuel production: a review https://doi.org/10.1007/s10311-020-01088-5
  84. Jeevan Kumar et al. (2017) Sustainable green solvents and techniques for lipid extraction from microalgae: a review (pp. 138-147) https://doi.org/10.1016/j.algal.2016.11.014
  85. Bligh and Dyer (1959) A rapid method of total lipid extraction and purification 37(1) (pp. 911-917) https://doi.org/10.1139/y59-099
  86. Ali et al. (2015) Extraction of date palm seed oil (phoenix dactylifera) by Soxhlet apparatus (pp. 261-271)
  87. Chen et al. (2020) Automated accelerated solvent extraction method for total lipid analysis of microalgae https://doi.org/10.1016/j.algal.2020.102080
  88. Kumari et al. (2011) Comparative evaluation and selection of a method for lipid and fatty acid extraction from macroalgae (pp. 134-144) https://doi.org/10.1016/j.ab.2011.04.010
  89. Halim et al. (2011) Oil extraction from microalgae for biodiesel production (pp. 178-185) https://doi.org/10.1016/j.biortech.2010.06.136
  90. Ramluckan et al. (2014) An evaluation of the efficacy of using selected solvents for the extraction of lipids from algal biomass by the soxhlet extraction method (pp. 103-108) https://doi.org/10.1016/j.fuel.2013.07.118
  91. Islam et al. (2014) Effect of temperature and moisture on high pressure lipid/oil extraction from microalgae (pp. 307-316) https://doi.org/10.1016/j.enconman.2014.08.038
  92. Aktaş et al. (2020) A review of the biodiesel sources and production methods (pp. 1-10)
  93. Bano et al. (2020) Fabrication and optimization of nanocatalyst for biodiesel production: an overview https://doi.org/10.3389/fenrg.2020.579014
  94. Jahirul et al. (2012) Biofuels production through biomass pyrolysis—a technological review (pp. 4952-5001) https://doi.org/10.3390/en5124952
  95. Veljković et al. (2012) Biodiesel production by ultrasound-assisted transesterification: state of the art and the perspectives (pp. 1193-1209) https://doi.org/10.1016/j.rser.2011.11.022
  96. Ho et al. (2016) Advances in ultrasound-assisted transesterification for biodiesel production (pp. 553-563) https://doi.org/10.1016/j.applthermaleng.2016.02.058
  97. Carmona-Cabello et al. (2019) Optimization of solid food waste oil biodiesel by ultrasound-assisted transesterification https://doi.org/10.1016/j.fuel.2019.115817
  98. Mahamuni and Adewuyi (2009) Optimization of the synthesis of biodiesel via ultrasound-enhanced base-catalyzed transesterification of soybean oil using a multifrequency ultrasonic reactor (pp. 2757-2766) https://doi.org/10.1021/ef900047j
  99. Boon-anuwat et al. (2015) Process design of continuous biodiesel production by reactive distillation: comparison between homogeneous and heterogeneous catalysts (pp. 33-44) https://doi.org/10.1016/j.cep.2015.03.025
  100. Motasemi and Ani (2012) A review on microwave-assisted production of biodiesel (pp. 4719-4733) https://doi.org/10.1016/j.rser.2012.03.069
  101. El Sherbiny et al. (2010) Production of biodiesel using the microwave technique (pp. 309-314) https://doi.org/10.1016/j.jare.2010.07.003
  102. Koech et al. (2020) In situ transesterification of spirulina microalgae to produce biodiesel using microwave irradiation (pp. 1-10) https://doi.org/10.1155/2020/8816296
  103. Cheng et al. (2013) Using wet microalgae for direct biodiesel production via microwave irradiation (pp. 531-535) https://doi.org/10.1016/j.biortech.2013.01.045
  104. Ertuğrul Karatay et al. (2019) Efficient approaches to convert Coniochaeta hoffmannii lipids into biodiesel by in-situ transesterification https://doi.org/10.1016/j.biortech.2019.121321
  105. Lee and Saka (2010) Biodiesel production by heterogeneous catalysts and supercritical technologies (pp. 7191-7200) https://doi.org/10.1016/j.biortech.2010.04.071
  106. Aransiola et al. (2014) A review of current technology for biodiesel production: state of the art (pp. 276-297) https://doi.org/10.1016/j.biombioe.2013.11.014
  107. Farobie and Matsumura (2017) State of the art of biodiesel production under supercritical conditions (pp. 173-203) https://doi.org/10.1016/j.pecs.2017.08.001
  108. Georgogianni et al. (2009) Transesterification of rapeseed oil for the production of biodiesel using homogeneous and heterogeneous catalysis (pp. 1016-1022) https://doi.org/10.1016/j.fuproc.2009.03.002
  109. Tariq et al. (2012) Activity of homogeneous and heterogeneous catalysts, spectroscopic and chromatographic characterization of biodiesel: a review (pp. 6303-6316) https://doi.org/10.1016/j.rser.2012.07.005
  110. Galadima and Muraza (2014) Biodiesel production from algae by using heterogeneous catalysts: a critical review (pp. 72-83) https://doi.org/10.1016/j.energy.2014.06.018
  111. Zuliani et al. (2018) Advances in nanocatalyst design for biofuel production (pp. 1968-1981) https://doi.org/10.1002/cctc.201701712
  112. Lam et al. (2010) Homogeneous, heterogeneous and enzymatic catalysis for transesterification of high free fatty acid oil (waste cooking oil) to biodiesel: a review (pp. 500-518) https://doi.org/10.1016/j.biotechadv.2010.03.002
  113. Semwal et al. (2011) Biodiesel production using heterogeneous catalysts (pp. 2151-2161) https://doi.org/10.1016/j.biortech.2010.10.080
  114. Mostafa et al. (2021) Process Optimization of biodiesel production via esterification of oleic acid using sulfonated Hierarchical mesoporous ZSM-5 as an efficient heterogeneous catalyst https://doi.org/10.1016/j.jece.2021.105035
  115. Nazir et al. (2021) Sulfonated activated sugarcane bagasse as heterogeneous catalyst for biodiesel production from waste cooking oil via microwave irradiation (pp. 286-291) https://doi.org/10.2991/aer.k.201229.037
  116. Mata et al. (2012) Biodiesel production from corn oil via enzymatic catalysis with ethanol (pp. 3034-3041) https://doi.org/10.1021/ef300319f
  117. Nagar and Fe (2014) Sulphated Fe2O3-TiO2 catalysed transesterification of soybean oil to biodiesel (pp. 1493-1499)
  118. Saber et al. (2016) Catalytic hydrothermal liquefaction of microalgae using nanocatalyst (pp. 566-576) https://doi.org/10.1016/j.apenergy.2016.09.017
  119. Khuri and Mukhopadhyay (2010) Response surface methodology (pp. 128-149) https://doi.org/10.1002/wics.73
  120. Gardy et al. (2017) Biodiesel production from used cooking oil using a novel surface functionalised TiO2 nano-catalyst (pp. 297-310) https://doi.org/10.1016/j.apcatb.2017.01.080
  121. Akia et al. (2014) A review on conversion of biomass to biofuel by nanocatalysts (pp. 16-25) https://doi.org/10.18331/BRJ2015.1.1.5
  122. Das et al. (2013) A study on biosynthesis of iron nanoparticles by Pleurotus sp (pp. 5-19) https://doi.org/10.1016/j.jare.2015.02.007
  123. Delmon et al. (1995) Manual of methods and procedures for catalyst characterization (technical report) (pp. 1257-1306) https://doi.org/10.1351/pac199567081257
  124. Khodafarin et al. (2020) Single-step conversion of sugarcane bagasse to biofuel over Mo-supported graphene oxide nanocatalyst https://doi.org/10.1007/s13399-020-01037-w
  125. Singh et al. (2020) Synthesis of CoO–NiO promoted sulfated ZrO2 super-acid oleophilic catalyst via co-precipitation impregnation route for biodiesel production (pp. 656-667) https://doi.org/10.1016/j.renene.2020.05.146
  126. Dahdah et al. (2020) Biodiesel production from refined sunflower oil over Ca–Mg–Al catalysts: effect of the composition and the thermal treatment (pp. 1242-1248) https://doi.org/10.1016/j.renene.2019.06.171
  127. Bharti et al. (2019) Process optimization of biodiesel production catalyzed by CaO nanocatalyst using response surface methodology (pp. 269-280) https://doi.org/10.1007/s40097-019-00317-w
  128. Agafonov et al. (2015) Controlling micro- and nano-structure and activity of the NaAlO2 biodiesel transesterification catalyst by its dissolution in a mesoporous γ-Al2O3-matrix (pp. 90-97) https://doi.org/10.1007/s10971-015-3755-8
  129. Tahvildari et al. (2015) The study of CaO and MgO heterogenic nano-catalyst coupling on transesterification reaction efficacy in the production of biodiesel from recycled cooking oil https://doi.org/10.1186/s40201-015-0226-7
  130. Hazmi et al. (2021) Synthesis and characterization of bifunctional magnetic nano-catalyst from rice husk for production of biodiesel https://doi.org/10.1016/j.eti.2020.101296
  131. Atadashi et al. (2011) Biodiesel separation and purification: a review (pp. 437-443) https://doi.org/10.1016/j.renene.2010.07.019
  132. Eevera et al. (2009) Biodiesel production process optimization and characterization to assess the suitability of the product for varied environmental conditions (pp. 762-765) https://doi.org/10.1016/j.renene.2008.04.006
  133. Abbah et al. (2016) Effect of reaction temperature on the yield of biodiesel from neem seed oil (pp. 16-20)
  134. Elkady et al. (2015) Production of biodiesel from waste vegetable oil via KM micromixer https://doi.org/10.1155/2015/630168
  135. Liu et al. (2012) Biodiesel production catalyzed by cinder supported CaO/KF particle catalyst (pp. 651-657) https://doi.org/10.1016/j.fuel.2012.02.002
  136. Madhuvilakku and Piraman (2013) Biodiesel synthesis by TiO2-ZnO mixed oxide nanocatalyst catalyzed palm oil transesterification process (pp. 55-59) https://doi.org/10.1016/j.biortech.2013.09.087
  137. Arora et al. (2016) Bioremediation of domestic and industrial wastewaters integrated with enhanced biodiesel production using novel oleaginous microalgae (pp. 20997-21007) https://doi.org/10.1007/s11356-016-7320-y
  138. Ramos et al. (2009) Influence of fatty acid composition of raw materials on biodiesel properties (pp. 261-268) https://doi.org/10.1016/j.biortech.2008.06.039
  139. Knothe (2009) Improving biodiesel fuel properties by modifying fatty ester composition (pp. 759-766) https://doi.org/10.1039/b903941d
  140. Dwivedi and Sharma (2014) Impact of cold flow properties of biodiesel on engine performance (pp. 650-656) https://doi.org/10.1016/j.rser.2013.12.035