褐煤和油菜秸秆低温共热解产物及协同效应分析（英文）

Analysis of Products and Synergetic Effect During Low Temperature Co-pyrolysis of Lignite and Rape Straw

印尼褐煤(IL)与不同质量分数的油菜秸秆(RS)在自制的低温煤炭化炉中共热解,得到热解半焦和焦油。结果表明:当RS的质量分数为30%时,共热解油的产率达到最大值14.03%,产率比纯褐煤热解油产率高57.59%。热解半焦的SEM结果表明,共热解半焦比褐煤半焦孔隙结构更加丰富;热解油的FTIR和GC-MS结果表明,共热解焦油更轻质化,酸度更低;样品的热重分析表明,油菜秸秆与褐煤的DTG峰值部分重叠,共热解过程符合二级动力学方程,加入RS后,共热解反应的活化能E降低,反应性增强,TG曲线向低温区域移动。RS和IL的共热解存在协同效应,共热解实现了褐煤和油菜秸秆的清洁高效利用。

Indonesia lignite(IL)was co-pyrolyzed with different mass fractions of rape straw(RS)in a lowtemperature coal carbonization furnace.The results indicate that the yield of pyrolysis oil reaches a maximum of 14.03%and the productivity will be 57.59%higher than that of pure lignite pyrolysis as the mass fraction of RS is 30%.The morphology and structure of semi-coke surfaces were described quantitatively by SEM,and pyrolysis oils were detected by FTIR and GC-MS.Thermogravimetric analysis of samples shows that the pyrolysis temperature range overlaps.The DTG peak of rape straw partially overlaps with lignite’s,and the pyrolysis process conformed to the second-order kinetic equation during co-pyrolysis.The activation energy Edecreases and the reactivity increases.Consequently,the TG curve moves to the low temperature region.By using the proposed method,the clean and efficient utilization of lignite and rape straw is realized,and the resources are turned into precious.