煤和蓝藻的共热解特性研究  

Co-Pyrolysis of Coal and Algae

作　　者：钱亚平[1] 李伟锋[1] 陈雪莉[1] 张强[1] 刘海峰[1] 

机构地区：[1]华东理工大学煤气化及能源化工教育部重点实验室上海煤气化工程技术研究中心,上海200237

出　　处：《华东理工大学学报（自然科学版）》2013年第1期35-41,共7页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(20906024);国家重点基础研究发展(973)计划(2011CB200906)

摘　　要：采用热重分析法,对神府煤和蓝藻单独热解及共热解(蓝藻掺混比,即蓝藻与干基混合物的质量比为5%,10%,20%,40%和80%)特性进行了研究。研究表明:蓝藻挥发分析出的极值温度比煤低,而且热解速率比煤快。蓝藻组成复杂、挥发分含量高且含有的不稳定键多,所以在较低温度下就会被破坏,从而以较高的速率挥发出去。当蓝藻与神府煤共热解时,低温下蓝藻的挥发分析出后,暴露出来的灰分覆盖在煤的表面,灰分中具有催化作用的碱和碱土金属会加快煤的热解反应,使煤的挥发分提前析出。当蓝藻的掺混比为40%和80%时,协同作用较明显,热解焦的产率比理论值低。The pyrolysis of Shenfu （SF） coal, algae and their blends （with 5%, 10%, 20%, 40%, 80% of algae in dry mass） was investigated by thermogravimetric analysis. The results indicate that the extremum temperature of devolatilisation of algae is lower , and the pyrolysis rate is faster than that of SF coal. Due to the complex composition, high content of volatiles and instable bonds, the algae is destroyed easily at low temperature and has a high devolatilisation rate. After the devolatilisation of algae at low temperature, the exposed ash covers the surface of the coal when algae co-pyrolysises with Shenfu coal. The alkali and alkaline earth metals in algae ash have catalytic effects, and can accelerate the pyrolysis reaction, bringing forward the devolatilisation of coal. When the mixing ratios of algae are 40% and 80%, the synergy effect is significant, and the char yield is lower than the theoretical value.

关 键 词：煤 生物质 共热解 

分 类 号：TQ530.2[化学工程—煤化学工程]