喷雾干燥铁催化剂F-T合成反应的研究  

STUDY OF FISCHER-TROPSCH SYNTHESIS ON SPRAY DRIED IRON CATALYST

作　　者：张荣乐[1] 白亮[1] 常杰[1] 徐元源[1] 相宏伟[1] 李永旺[1] 周敬来[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,太原博士生副研究员030001

出　　处：《煤炭转化》2004年第3期39-44,共6页Coal Conversion

基　　金：国家科技部"863"项目 ( 2 0 0 1AA5 2 3 0 10 );中国科学院知识创新重大项目 ( KGCX1-SW-0 2 );山西省自然科学基金资助项目 ( 2 0 0 3 10 3 2 )

摘　　要：采用转环式无梯度反应器对沉淀 -喷雾干燥技术相结合制备的 Fe- Cu- K- Si O2 催化剂在反应温度 2 5 0℃～ 2 80℃ ,压力 0 .5 MPa～ 1 .5 MPa,H2 /CO比 0 .1 9～ 1 .35和原料气空速 1 0 0 0h-1～ 2 5 0 0 h-1的条件下对 Fisher- Tropsch合成反应性能进行了考察 .结果表明 ,该催化剂具有较高的 F- T反应活性和水煤气交换 ( WGS)反应活性 ,产物烃分布显示出高的烯烃选择性 ,说明该条件有利于初级烯烃的脱附和低碳烃的生成 ,一定程度上减少了烯烃再吸附的链增长反应 .还考察了各种反应条件对产物碳数分布的影响 ,并观察到了运行过程中催化剂较低的失活速率 .The reaction performance of a Fe-Cu-K-SiO 2 catalyst prepared by the combination of precipitation and spray drying technology for Fischer-Tropsch synthesis was investigated in a spinning ring gradientless reactor under industrial conditions of temperature 250 ℃-280 ℃,pressure 0.5 MPa-1.5 MPa,H 2/CO feed ratio 0.69-1.35 and GHSV 1000 h -1 -2 500 h -1 .The result indicated that the catalyst was of higher F-T activity and water-gas shift (WGS) activity.Hydrocarbon product distribution showed higher selectivity to light olefins.The desorption of primary olefin and the formation of light hydrocarbons were prior under the reaction condition,which decreased chain growth reaction leading from olefin readsorption to some extent.In the article,the effect of reaction conditions on product carbon number distribution also was studied.In addition,the lower activity loss of the catalyst with time on stream was observed.

关 键 词：Fisher-Tropsch合成 沉淀铁催化剂 喷雾干燥 无梯度反应器 

分 类 号：TQ426[化学工程] TQ517