煤多段加氢热解过程的研究(Ⅰ)反应条件对产物分布的影响  

MULTI-STAGE HYDROPYROLYSIS OF COAL(Ⅰ) EFFECT OF OPERATING CONDITIONS ON PRODUCT DISTRIBUTIONS

作　　者：王娜[1] 李文[1] 李保庆[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《化工学报》2001年第5期420-423,共4页CIESC Journal

基　　金：国家自然科学基金重点基金 !(No.2 993 60 90 );中科院应用研究与发展重点基金;山西煤化所所长基金资助项目&&

摘　　要：在 10g加压固定床上考察了 5℃·min-1和 2 5℃·min-1的升温速率下先锋褐煤的多段加氢热解过程 .详细考察了有关的工艺参数如停留时间、升温速率、气体流量、反应压力及反应气氛对多段加氢热解过程产物分布的影响 ,并与同等条件下的单段加氢热解过程进行了对比分析 .实验结果表明 :多段加氢热解过程明显优于同等反应条件下的单段加氢热解过程 ,采用快速升温、多段停留的手段基本可以达到慢速升温过程高的转化率及油收率 ;多段加氢热解过程中的停留作用随升温速率的增大、反应压力的增加、氢气流量的增大而显著增大 .The multi-stage hydropyrolysis (holding near the peak temperature of 500 and 600?℃ for 10?min,respectively)of Xianfeng lignite was investigated at heating rates of 5?℃·min -1 and 25?℃·min -1 in a 10?g fixed-bed reactor.The effects of residence time,heating rate,gas flow and pressure on product yields of hydropyrolysis with different heating methods were studied.Higher yields of tar are obtained in multi-stage HyPy than in normal HyPy.The results showed that the tar yields and overall conversions at high heating rates in multi-stage hydropyrolysis approximated to those at constant slower heating rates;the retention effect is remarkable with increasing heating rate,pressure and hydrogen flow.The experiments under syngas exhibited the potential advantage of multi-stage HyPy in industrial utilization.

关 键 词：煤 多段加氢热解 产物分布 固定床反应器 反应条件 停留时间 升温速率 反应压力 

分 类 号：TQ530.2[化学工程—煤化学工程]