热解温度对玉米秸秆催化热解制取高值燃气的影响

Effect of pyrolysis temperature on catalytic pyrolysis of corn stalk for high value gas

文章利用管式炉反应器研究了玉米秸秆热解制取高值燃气的特性和物质的迁移转化规律。首先探究了玉米秸秆在不同热解温度下的热解反应规律,进而添加催化剂进一步促进中间产物的转化并提高氢气的生成。研究结果表明:提升热解温度可以显著提升热解气产率和H_(2)产量,H_(2)产量从400℃时的1.2 mL/g上升至800℃时的54.1 mL/g,其占总热解气的比例也从0.9%提升至22.3%;进一步提升热解温度会促进氢气向其他气体的转化反应,使得H_(2)产量下降至32.3 mL/g,占总热解气的比例下降至14.3%;添加CaO可以显著提升热解气产率和氢气产量,热解气产率提高到了38.8%,H_(2)产量达到了98.7 mL/g。

In this paper,the characteristics of pyrolysis of corn straw to produce high value gas and the law of material migration and transformation were studied in a tubular furnace reactor.Firstly,the pyrolysis reaction of corn straw at different temperatures was explored,then the catalyst were added to further promote the conversion of intermediate products and improve the generation of hydrogen.The results showed that increasing the pyrolysis temperature can significantly improve the yield of pyrolysis gas and hydrogen.The yield of H_(2) increased from 1.2 mL/g at 400℃to 54.1 mL/g at 800℃,and its proportion in the total pyrolysis gas increased from 0.9%to 22.3%.Further increasing the pyrolysis temperature will promote the conversion of hydrogen to other gases,which will reduce the H_(2) production to 32.3 mL/g,accounting for 14.3%of the total pyrolysis gas.The addition of CaO can significantly improve the yield of pyrolysis gas and the hydrogen production.The yield of pyrolysis gas increased to 38.8%and the H_(2) production was 98.7 mL/g.