混合气气氛下纸浆黑液和钙混合催化剂的催化气化特性(英文)  

Catalytic gasification characteristics of mixed black liquor and calcium catalyst in mixing(air/steam) atmosphere

作　　者：JAFFRI Gul-e-rana 张济宇[1] 

机构地区：[1]福州大学化学工程技术研究所,福建福州350002

出　　处：《燃料化学学报》2008年第4期406-414,共9页Journal of Fuel Chemistry and Technology

基　　金：National Natural Science Foundation of China(20376014);Fujian Science and Technology Council Grant(HG99-01).

摘　　要：采用热重法在单一和混合催化剂（即3%钙和5%钠-黑液单一催化剂及一种3%钙和5%钠-黑液混合催化剂）,温度750℃-950℃及常压条件下对三种高变质无烟煤（福建龙岩、丰海和尤溪煤）研究了混合气气化过程中对碳转化率、气化反应速率及有害污染含硫气体相对量的催化效应。纸浆黑液和钙混合催化剂具有两者的的协同作用,在混合气气化过程中,3%钙和5%钠-黑液混合催化剂可极大地增加碳转化率和气化反应速率系由于该混合催化剂碱性表面化合物[—COM]、[—CO2M]及可交换的钙酚盐和羧酸钙[（—COO）2Ca]的存在加速了反应C＋2CO2=2CO和C＋H2O→CO＋H2的结果,且这一催化作用比水蒸气气化过程更强烈。通过添加碳酸钙于纸浆黑液催化剂的气化方法,除去促进催化剂功效和增加碳转化率以外,也可达到有效的脱硫作用,但是这一较好的操作温度需低于900℃。The catalytic effect of single and mixed catalysts including two single catalysts with 3% Ca and 5% Na-BL, and one 3% Ca ＋ 5% Na-BL mixed catalyst on carbon conversion, gasification reaction rate, relative amount of harmful pollutant like sulphur containing gases under temperature ranging from 750℃ to 950℃ and ambient pressure conditions were investigated by thermogravimetry in mixing （air/steam） gasification for three high-metamorphous anthracites of Longyan, Fenghai, and Youxia coals. The mixed BL ＋ Ca catalyst has a synergetic effect in comparison with only using single BL and Ca catalyst. At mixing gasification the mixed catalyst of 3% Ca ＋ 5% Na-BL greatly increases the carbon conversion and reaction rate by accelerating the reactions of C ＋ CO2→2CO and C ＋ H2O→CO ＋ H2 because of the presence of alkali surface compounds [ COM ] and [ CO2M ], and exchanged calcium phenolate and calcium carboxylate （COO） 2. This catalytic action is stronger than steam gasification. By adding CaCO3 into BL catalyst in gasification less than 900℃, the catalytic ability is improved with increasing coal conversion and effective desulphurization.

关 键 词：混合催化剂 钙 黑液 热重分析法 混合气催化气化 含硫气体 

分 类 号：TQ546[化学工程—煤化学工程]