煤-焦炉气共热解热重研究Ⅱ.热解半焦燃烧反应性  

TGA STUDY ON COPYROLYSIS OF COAL AND COKEOVEN GAS Ⅱ COMBUSTION REACTIVITY OF CHARS FROM COAL COPYROLYSIS WITH COKEOVEN GAS

作　　者：廖洪强[1] 孙成功[1] 李保庆[1] 刘泽常[2] 

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 [2]山东矿业学院济南分院化工系

出　　处：《燃料化学学报》1997年第6期544-548,共5页Journal of Fuel Chemistry and Technology

基　　金：日本NEDO资助项目;山西省自然科学基金;山东省自然科学基金

摘　　要：采用高压热天平在终态温度为８００℃，压力为０．１～５ＭＰａ，升温速率为５～２５℃／ｍｉｎ的实验条件下，对先锋、黄县褐煤和兖州烟煤在真实焦炉气气氛中共热解特性进行了系统的ＴＧ／ＤＴＧ研究，主要考察了反应压力、升温速率对热解特性的影响，并与可比条件下加氢热解作比较。结果表明，压力和升温速率对热解有较大影响，压力升高热解总失重量增加，升温速率减慢有利于提高热解总转化率；压力与升温速率互相促进又互相制约共同影响热解特性。在给定较高压力下，减慢升温速率能明显提高热解总转化率；在慢速升温条件下，提高压力也能明显提高热解总转化率，通过降低升温速率可以实现在较低压力下达到甚至超过高压下的热解效果。与可比条件下的加氢热解相比，煤焦炉气共热解具有相近的热解特性，但总转化率略有降低且失重峰温向高温区移动。At pressures of 0 15MPa, heating rates of 5～25℃/min and a final temperature of 800℃, copyrolysis behavior of 3 Chinese coals with real cokeoven gas (COG) were investigated in detail by using thermogravimetric analysis (TGA) and compared with hygropyrolysis under comparable conditions Results indicated that the reaction pressure and heating rate have significant effects on copyrolysis behavior With a raising pressure and a decreasing heating rate the total conversion increases There is a coeffect on copyrolysis between pressure and heating rate, by decreasing the heating rate, higher conversion can be abtained at low pressure than at high pressure wiht high heating rate To increase the total conversion of the copyrolysis, high pressure and low heating rate can be used Xianfeng and Huangxian lignite are more easy to pyrolyze than Yanzhou bituminous coal under COG Compared with hydropyrolysis under comparable conditions, the total conversion of the copyrolysis slightly decreases and the peak temperatures in DTG move toward the low temperature region

关 键 词：煤 焦炉气 热解 TGA 共热解 

分 类 号：TQ530.2[化学工程—煤化学工程]