碱性木质素与油页岩共热解及协同作用的分析

发布时间：2018-01-07 21:20

本文关键词：碱性木质素与油页岩共热解及协同作用的分析　出处：《化学工程》2017年03期 　论文类型：期刊论文

【摘要】：利用热重红外联用仪对油页岩、碱性木质素二者的单独样和混合样进行常压热解实验,对两者的混合共热解特性以及协同作用进行了分析。结果表明:通过理论值与实验值对比以及RMS指数分析,发现两者仅在高温热解区间存在明显的协同作用。升温速率越小的试样,反应越彻底,质量损失率也最高;反之产生热解滞后现象;两者的混合热解质量损失峰整体都随着升温速率的升高,向高温一侧移动,但整体变化不大。CH_4、CO、芳环结构化合物的气体析出浓度与升温速率成正比关系;其他产物均为不规律变化。碱性木质素在热解终温为900℃时的半焦表面存在气相产物扩散未果而形成的鼓泡状小颗粒;而油页岩热解已接近完成,所得半焦未见鼓泡状小颗粒,整体平坦圆滑,存在大量的空隙;随着混合样品中油页岩所占比例的减小,热解所得半焦开始发生破碎现象,孔隙增大,鼓泡状小颗粒分散且形态变小,表面粗糙度降低,半焦表面亮度增加。
[Abstract]:Combined with the instrument of oil shale using thermal infrared, alkaline lignin two separate samples and mixed samples of atmospheric pyrolysis experiments, mixing on both CO pyrolysis characteristics and synergistic effect were analyzed. The results show that compared with the experimental values and the RMS index of the theoretical value, found only two obvious synergistic effect in the pyrolysis heating rate is small. The sample interval, the reaction is more complete, the mass loss rate is highest; and produce pyrolysis hysteresis; mixed pyrolysis mass loss peak overall with the increasing of heating rate, move to the high temperature side, but little overall change in.CH_4, CO, aromatic compounds gas precipitation the concentration and heating rate is proportional to the other; the products are not changed regularly. Alkaline lignin in the final pyrolysis temperature for semi coke surface 900 DEG C in the presence of gas phase diffusion failed to form bubble Small particles; and the oil shale pyrolysis is nearing completion, the semi coke no bubble shaped small particles, the overall smooth smooth, there are a lot of space; with the decrease of the proportion of mixed samples of oil shale and semi coke pyrolysis process began crushing phenomenon, pore diameter and bubble shaped small particles dispersed and form smaller the surface roughness is reduced, the surface brightness of the semi coke increased.

【作者单位】：东北电力大学油页岩综合利用教育部工程研究中心;
【基金】：吉林省重点科技攻关项目(20140204004SF) 长江学者和创新团队发展计划(IRT13052)
【分类号】：TE662;TK6
【正文快照】： 油页岩是一种潜能极大的石油补充能源。它是固体可燃有机质在无机质中的沉积岩[1]。合理利用油页岩可弥补能源不足[2]。生物质能相比化石燃料具有低污染可再生等优点。生物质中,木质素是仅次于纤维素的第二丰富的可再生资源[3],是所依据。有陆生植物的主要成分之一,约占总

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