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γ-Al2O3为载体催化剂作用下玉米芯和煤矸石的热解行为研究

发表时间:2017-06-30  浏览量:156  下载量:17
全部作者: 刘小红,王宝凤,张进军
作者单位: 山西师范大学化学与材料科学学院;山西大学资源与环境工程研究所
摘 要: 利用固定床反应器对玉米芯和煤矸石及两者混合物的热解特性进行研究,考察混合比例、温度和添加剂对两者共热解行为的影响。研究结果表明,在不同的掺混比例下,生物质与煤矸石共热解时,当煤矸石的比例小于50%时,液体油收率的实验值大于计算值,并且当温度大于200℃时有协同作用。添加γ-Al2O3和改性后的γ-Al2O3会影响两者共热解的产物分布和液体油收率。γ-Al2O3与改性后的γ-Al2O3,除Co/γ-Al2O3使液体油收率降低外,其余无明显变化,但均使固体残渣收率升高,气体收率降低。采用核磁共振氢谱(1H nuclear magnetic resonance,1H NMR)、核磁共振碳谱(13C nuclear magnetic resonance,13C NMR)和傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FTIR)分析热解所得液体油性质,发现玉米芯和煤矸石共热解后所得的液体油中脂肪族化合物含量增加,含氧化合物(芳香醚、碳水化合物和有机酸、醛、酮)含量减少,从而降低了液体油的酸性和不稳定性,即提高了液体油的品质。添加Co/γ-Al2O3、PW12/γ-Al2O3、Mo/γ-Al2O3和γ-Al2O3也影响液体油的品质,这些添加物都会减少液体油中含氧化合物(酸、醛、酮)的含量,增加烯烃和芳香族含量。
关 键 词: 三废处理与综合利用;玉米芯;煤矸石;共热解;添加剂
Title: Co-pyrolysis of corncob and coal gangue with γ-Al2O3-based catalyst
Author: LIU Xiaohong, WANG Baofeng, ZHANG Jinjun
Organization: School of Chemistry and Material Science, Shanxi Normal University; Institute of Resources and Environment Engineering, Shanxi University
Abstract: Co-pyrolysis behaviors of corncob and coal gangue are studied in a fixed bed reactor. The effects of blending ration, temperature and additives on products are investigated. Results show that the liquid oil yields observed are higher than calculated values at coal gangue proportion of 20% and 40%, and corncob and coal gangue had synergistic effect during co-pyrolysis above 200℃. γ-Al2O3 and modified γ-Al2O3 have effect on product distributions and property. Adding γ-Al2O3and modified γ-Al2O3 (except Co/γ-Al2O3), the yields of liquid oil have no abvious change. But all additives enhance the yeilds of solid, and decrease the yeilds of gas. While, Co/γ-l2O3decrease the yeilds of liquid oil. 1H nuclear magnetic resonance (1H NMR), 13C nuclear magnetic resonance(13C NMR) and Fourier transform infrared spectroscopy (FTIR) analysis indicated thatduring the co-pyrolysis, the contents of aliphatic compounds were increased and the contents of oxygenated compounds, aromatic ether and carbohydrates were decreased, which showed that liquid oil obtained from co-pyrolysis has a good property. Co/γ-Al2O3, PW12/γ-Al2O3, Mo/γ-Al2O3and γ-Al2O3 also have important influences on the liquid oil property, and adding them could reduce the contents of undesirable components (carboxylic acids, ketones and aldehydes) and enhanc the contents of alkene and phenols compounds.
Key words: processing and comprehensive utilization of three wastes; corncob; coal gangue; co-pyrolysis; additives
发表期数: 2017年6月第12期
引用格式: 刘小红,王宝凤,张进军. γ-Al2O3为载体催化剂作用下玉米芯和煤矸石的热解行为研究[J]. 中国科技论文在线精品论文,2017,10(12):1369-1380.
 
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