燃料化学学报Issue(5)：537-545,9.
H2气氛下褐煤快速热解过程中CH4逸出规律的分析
Analysis of CH4 evolution in fast pyrolysis of lignite under H2 atmosphere
摘要
Abstract
The fast hydropyrolysis of Huolinhe lignite were carried out under pressure in a tubular reactor with a transporter for coal samples. The effect of H2 on CH4 evolution and crack of chemical bonds were analyzed. Under pressure fast hydropyrolysis conditions, CH4 yield was higher under H2 atmosphere than that under N2 atmosphere, and increased with increasing temperature and pressure. Compared with N2 atmosphere, the yield of CH4 increased by 72. 5% under 50% H2 atmosphere at 900℃ and 1. 0 MPa. H2 or H· free radical induced the cracks of aromatic rings, side chains, ether linkages and aliphatic chains in the char, which could promote the coal pyrolysis. The increased yield of CH4 was mainly due to the external donor H. Below 700℃, the action of H2 with active groups in coal structure affected the pyrolysis of coal; above 700 ℃, hydrogenation of char promoted coal pyrolysis, leading to an increase in CH4 yield.关键词
H2 气氛/加压快速热解/CH4 逸出规律/化学键断裂Key words
H2 atmosphere/in fast pyrolysis under pressure/the CH4 evolution/the crack of the chemical bonds分类
化学化工引用本文复制引用
高松平,王建飞,赵建涛,王志青,房倚天,黄戒介..H2气氛下褐煤快速热解过程中CH4逸出规律的分析[J].燃料化学学报,2015,(5):537-545,9.基金项目
国家自然科学基金(21106173) （21106173）
中国科学院战略性先导科技专项(XDA0705100) （XDA0705100）
中国科学院山西煤炭化学研究所青年人才基金(2011SQNRC01) （2011SQNRC01）
山西省高校科技开发项目(20101135)。 （20101135）
