10.1007/s40095-021-00451-8

Biomass gasification in a double-tapered bubbling fluidized bed reactor using preheated air

  • Gokul Gopan*1,
  • Lalhmingsanga Hauchhum1,
  • Pankaj Kalita2,
  • Satyajit Pattanayak1,
  1. Department of Mechanical Engineering, National Institute of Technology Mizoram, Mizoram, 796012, IN
  2. Centre for Energy, Indian Institute of Technology Guwahati, Assam, 781039, IN

Published in Issue 2021-11-26

How to Cite

Gopan, G., Hauchhum, L., Kalita, P., & Pattanayak, S. (2021). Biomass gasification in a double-tapered bubbling fluidized bed reactor using preheated air. International Journal of Energy and Environmental Engineering, 13(2 (June 2022). https://doi.org/10.1007/s40095-021-00451-8
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Abstract

Abstract Production of clean energy from biomass through thermochemical conversion techniques has gained substantial momentum over the last decades. The biomass gasification is a noteworthy thermochemical conversion technique due to its varied advantages like feed material flexibility and ease of operation. Here in this work, the effects of applying air preheating for the gasification of biomass (dry wood) under varied particle size (100, 300 and 800 µm) and its outcome are simulated using ANSYS FLUENT 14.0. Two-fluid model is used for the simulation study with distinct phases—air (Phase-1) and wood (Phase-2). The boundary conditions are applied, and the simulation results obtained are matched with available studies. The inlet velocity of the gasifying medium is varied from 0-3m/s analogous to the bubbling fluidized bed velocity range. The gasification temperature ranges are 973, 1073 and 1173 K. The simulations are conducted with and without preheated air in a double-tapered bubbling fluidized bed reactor having taper angle of 5°.The fluid velocity and taper angle play an essential role in controlling the solid particle suspension rate inside the reactor chamber. However, the air preheating maintains the overall reactor temperature that enhances the solid–gas conversion rate.

Keywords

  • Double-tapered bubbling fluidized bed reactor,
  • Taper angle,
  • Biomass gasification,
  • Air preheating,
  • Energy conversion techniques,
  • Computational fluid dynamics

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