10.1007/s40095-020-00377-7

Coal gasification process optimization for maximum calorific value and minimum CO2 emission using Taguchi method and utility concept

  • Rupesh Palange*1,
  • Murugesan Krishnan1,
  1. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, IN

Published in Issue 2021-01-06

How to Cite

Palange, R., & Krishnan, M. (2021). Coal gasification process optimization for maximum calorific value and minimum CO2 emission using Taguchi method and utility concept. International Journal of Energy and Environmental Engineering, 12(2 (June 2021). https://doi.org/10.1007/s40095-020-00377-7
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Abstract

Abstract The present research work proposes an optimization procedure using Taguchi method and utility concept with the main objective of maximizing the calorific value of syngas with lower CO 2 yield during coal gasification process using thermodynamic equilibrium model based on stoichiometric approach. After validating the model with experimental results, the effect of air supply and steam supply on output gas composition and temperature were analyzed in detail. For the purpose of optimization, six control variables at three levels consisting of coal properties, oxidant properties, and reaction properties are considered for optimization of objective functions. The trial runs for Taguchi analysis were carried out using L 27 orthogonal array and the concept of signal-to-noise ratio was used to optimize the process. Taguchi method produced two sets of levels of the control variables, one for maximum calorific value of 3.59 MJ/m 3 and another set for minimum CO 2 yield of 6.25%. To obtain a common set of control variable levels, utility concept has been implemented for optimization of maximum calorific value with low CO 2 yield simultaneously. Among the control variables considered, air supply, steam supply, and H/C ratio of coal are found to be the most influencing parameters. It is observed that the calorific value and CO 2 yield calculated from the utility concept differ by 3.34% and 2.30%, respectively, compared to the values calculated by the Taguchi method.

Keywords

  • Coal gasification,
  • Thermodynamic equilibrium model,
  • Calorific value of syngas,
  • Taguchi method,
  • Utility concept

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