Shell is mainly composed of CaCO3

so it is applied as the catalyst to investigate its effect on biomass gasification.Performance tests on gas yield of the biomass gasification with different material ratios and temperatures were carried out.The results show that

the optimum temperature range for shells catalyzing biomass in atmosphere with existing of water vapor is from 750℃to 950 ℃;the shell mainly speeds up the splitting decomposition of large molecules containing carbon

of which the gasification efficiency is relevant to the total content of H2and CO and the ratio of H2to CO during gasification;at 950℃

with the material ratio of 20%

the carbon conversion rate is 94%

the energy conversion rate of materials is 81%

which is increased by 10.3%and6%respectively

compared with that of the pure biomass under the same condition.