褐铁矿催化作用下生物质高温水蒸气气化实验研究

Experimental study of high temperature steam gasification of biomass under catalysis of limonite

针对生物质气化过程中焦油量大、产气率低等问题,应用高温水蒸气催化气化的方法提高了产氢率,增大了生物质能源的利用率。以内配褐铁矿粉的松木屑成型颗粒为气化原料,采用廉价易得的褐铁矿作为催化剂,以高温水蒸气作为气化剂。通过实验得出:质量分数为15.00%的褐铁矿,在气化温度750℃、蒸汽质量流量0.89kg/h条件下,1.5kg成型颗粒1h总产气量为800L,H2体积分数为55.28%,气体热值为11.31MJ/m3,与无添加相比,产气量增加了11.1%,总热能产出增加了5.78%;气化终温850℃下,产气量970L,H2体积分数57.13%,热能产出量达到了10.33 MJ。

Aiming at the problem of large amount of tar and the low gas production rate,the method of high temperature steam catalytic gasification was used to improve the rate of hydrogen production and utilization of biomass energy.The high temperature steam gasification experimental study has been conducted by using the pine sawdust particles as the gasification raw material which is a mixture of limonite powder and the limonite as catalyst which is cheap and easy to obtain high temperature steam as gasification agent.Through the experiment,1.5kg pine sawdust outputs gas volume 800 Ltotally in one hour and the highest hydrogen content is 55.28%and gas calorific value is11.31MJ/m3 under the condition of adding 15%limonite,gasification temperature 750℃and steam flow 0.89kg/h,compared with the blank experiment,the gas production increases by 11.1% and the total heat output increases by 5.78%,under the gasification temperature of 850 ℃,gas production is 970 L,the hydrogen content is 57.13%,the heat output reaches 10.33 MJ.