新疆淖毛湖长焰煤地下催化热解的反应特性  

Underground Catalytic Pyrolysis Reaction Characteristics of Long Flame Coal from Naomaohu in Xinjiang

作　　者：梁新星[1] 吕俊鑫 舒新前[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京博士后100083

出　　处：《煤炭转化》2017年第3期28-33,共6页Coal Conversion

基　　金：新疆维吾尔自治区科技计划项目(201532108)

摘　　要：设计了适合于地下催化热解/气化的错时喷射催化剂添加装置,在卧式热解反应器中使用四种典型催化剂对新疆淖毛湖长焰煤进行地下催化热解模拟实验.结果表明:四种催化剂可有效提高热解气中H_2和CO组分及气态产物产率,催化活性由大到小依次为8%Na_2CO_3溶液(8%为质量分数,下同),10%Ca(OH)_2溶液,10%CaO粉末,6%FNC(复合催化剂(Fe_2O_3-Na_2CO_3-Ca(OH)3));活性较高的Na_2CO_3溶液和Ca(OH)_2溶液使热解气中H_2组分提高了19%(体积分数),CO组分增加1.2倍,CH_4组分在低温热解区有所增加,但在600℃以上热解时无明显效果.半焦和焦油产率较催化前分别下降30%和20%~70%,煤气产率提高1.4倍~1.6倍.从催化活性和成本分析,在地下催化热解过程中主催化剂可选择Ca(OH)_2溶液,并配置活性最高的Na_2CO_3溶液作为辅助催化剂.Interleaved catalyst injection unit suitably for underground pyrolysis and gasifi- cation was designed. Four sorts of typical catalysts were used in the horizontal pyrolysis reactor for the simulation test of underground catalytic pyrolysis on the long flame coal of Naomaohu in Xinjiang. The results show that these four sorts of catalysts can efficiently improve the composi- tion of H2 and CO, and the yield of gaseous products. The descending order of their catalytic activity is 8% Na2CO3 solution （8% is mass fraction, the same below）, 10%Ca（OH）2 solution, 10 % CaO powder, 6 % FNC （compound catalyst （Fe2 O3-Na2 CO3-Ca （OH） 2 ） ）. For Na2 CO3 and Ca（OH）2 of high activity, these two catalyties increase the composition of H2 by 19% （volume fraction） in the pyrolysis gas and CO by 1.2 times respectively, and increase the composition of CH4 in the low temperature pyrolysis, but without sustainable effect during the pyrolysis over 600 ~C. The yield of semicoke and tar decreases by 30o//oo and 20G-70G respectively, and gas yield can increase by 1.4-1.6 times compared to the yield before the catalytic pyrolysis. On the analysis of the aspects of catalytic activity and cost, Ca（OH）2 can be selected as the major catalyst for underground catalytic pyrolysis, and Na2 CO3 of highest activity can be considered as promoter.

关 键 词：长焰煤 地下催化热解 催化剂活性 热解气 错时喷射 

分 类 号：TQ546[化学工程—煤化学工程] O643.36[理学—物理化学]