稻壳连续热解特性研究

在自行研制的生物质连续热解反应装置上进行稻壳连续热解和二次裂解实验研究。随着稻壳热解温度的提高,炭产率降低,气体产率增加,液体产率先增加后减少;随着滞留时间的减少,炭产率、液体产率增加,气体产率减少。稻壳热解气以CO2和CO为主,且二者为竞争关系,热解温度提高,CO2产量降低,CH4、H2、C2H4、C2H6产量增加,CO的产率变化不大;滞留时间对热解气组分影响不大。二次裂解温度提高,裂解气中的H2、CH4、C2H4含量明显增加,二次裂解温度为800℃时,H2产率达到12%。稻壳500℃热解挥发物600℃二次裂解木醋液中醋酸含量高达49.44%,焦油中检测到的物质主要为丙酮和异丙醇。

STUDY ON CONTINIOUS PYROLYSIS OF RICH HUSK

The continuous pyrolysis and secondary cracking performance of rice husk was investigated in a biomass continuous pyrolysis reactor.The effects of pyrolysis temperature,residence time and secondary cracking temperature on pyrolysis products were studied.When rice husk pyrolysis gas composes CO2 and CO mainly,the yield of CO2 reduced and yield of CH4,H2,C2H4,C2H6 increasesd,yield of CO is not much change with pyrolysis temperature increasing.Residence time has little effect on the composition of pyrolysis gas.The yield of H2,CH4,C2H4 increases significantly with increasing the temperature of secondary cracking.When secondary cracking temperature is 800℃,production rate of H2 was 12%.Rice husk pyrolysing at 500℃,then cracking at 600℃,acetic acid is as high as 49.44% in the wood vinegar,and acetone and isopropanol are the two more compositions detected in the tar.