Fuel gas generation in a lab-scale dual fluidized bed rice husk gasifier

M K Karmakar; Sai Gu; Juray De Wilde; P K Chatterjee; P Mahanta

Authors

M K Karmakar CSIR-Central Mechanical Engineering Research Institute (CSIR-CMERI) Durgapur – 713 209, India
Sai Gu Offshore, Process and Energy Engineering, Cranfield University, UK
Juray De Wilde Division of Materials and Process Engineering Universite catholique de Louvain, Louvain-la-Neuve, Belgium
P K Chatterjee CSIR-Central Mechanical Engineering Research Institute (CSIR-CMERI) Durgapur – 713 209, India
P Mahanta Indian Institute of Technology Guwahati, Mechanical Engineering Department, Guwahati - 781039, India

Keywords:

dual fluidized bed, gasification, rice husk, experimentation, fuel gas generation

Abstract

Dual fluidized bed gasification (DFBG) technology is a promising option to produce medium calorific value N2 -free fuel gas. The present study deals with the development of a self sustaining lab scale are shown below DFBG consisting of a bubbling fluidized bed gasifier and a fast bed combustor, coupled through L-valves. Stable operation of this set up can be achieved by supplying liquefied petroleum gas to the combustor to generate N2 free syngas in the gasifier. Rice husk was used as the feedstock, steam as the gasifying agent. Experimental investigation includes a parametric study of process parameters such as gasifier temperature and steam flow rate. H2 concentration increases with higher gasification temperature and higher steam flow. CO concentration increases with increasing gasification temperature but decrease with higher steam flow. Higher heating value of fuel gas, char conversion and cold gas efficiency has been analyzed as performance indicators of the system.