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.
出处
《煤炭转化》
CAS
CSCD
北大核心
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 )