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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。
Continuous pyrolysis of rice hulls and secondary pyrolysis experiments were carried out on a self-developed biomass continuous pyrolysis reactor. With the increase of pyrolysis temperature of rice husk, the carbon yield decreased, the gas yield increased, and the liquid yield first increased and then decreased. With the decrease of residence time, the carbon yield, liquid yield and gas yield decreased. The pyrolysis gasses of rice husk consist mainly of CO2 and CO, and the two are competitive. The pyrolysis temperature is increased, the CO2 production is decreased, the yield of CH4, H2, C2H4 and C2H6 is increased, and the yield of CO is not changed much. Pyrolysis components have little effect. The secondary cracking temperature increased, the contents of H2, CH4 and C2H4 in the cracked gas increased obviously, and the H2 production rate reached 12% when the secondary cracking temperature was 800 ℃. Pyrolysis of rice husk at 500 ℃ Volatile compounds at 600 ℃ The content of acetic acid in wood vinegar was up to 49.44%. The main substances detected in tar were acetone and isopropanol.