Parametric Analysis of Hydrogen-rich gas from Sawdust Gasification

Abstract

In the present study the air and steam gasification of biomass to produce hydrogen-rich gas or syngas (H₂ and CO) was investigated. The influence of the air and steam on yield and product composition was studied at the temperature range of 600 to 1200°C. The highest amount of hydrogen present during air gasification is 25% with equivalence ratio of 0.3. The addition of steam increases the hydrogen from 25% to 55% in the temperature range of 700 to 800⁰C. Higher temperature resulted in the formation of high amount of H₂ and CO production, higher carbon conversion efficiency and dry gas yield. The Lower Heating Value (LHV) of the gas from the sawdust is higher in steam gasification with 0.2 – 0.4 kg of steam and lower range was observed in air gasification. Steam gasification in the range of 0.2 – 0.4 kg of steam is found to yield high amount of H₂ and CO gas at a temperature range of 700 to 800°C.