摘要
采用浸渍法制备了负载型磷钨酸催化剂,通过FCC汽油烷基化硫转移反应考察催化剂制备条件对烷基化反应活性的影响,结果表明,催化剂制备过程中的磷钨酸负载量和焙烧温度对催化剂活性的影响较大,在磷钨酸的负载量(w)为60%、焙烧温度200℃、焙烧时间4h条件下制备的负载型磷钨酸催化剂的烷基化活性最好,可将FCC汽油中小于100℃馏分的硫含量从原来的82.38 mg/L降到9.76 mg/L,100～120℃馏分的硫含量可从原来的183.27 mg/L降到65.03 mg/L,而大于120℃馏分的硫含量从257.31mg/L增加到436.39mg/L,可见烷基化反应后汽油中的含硫物质转移到了高沸点组分中,并得到气相色谱分析验证。
Phosphotungstic acid catalysts supported on silica were prepared by impregnation method and the effect of preparation conditions on the catalyst activity was investigated by the sulfur transfer reactions during the alkylation of FCC naphtha. Results showed that phosphotungstic acid loading amount and calcination temperature had significant effect on the catalyst activity. Catalyst prepared under the conditions of a phosphotungstic acid loading amount of 60%, a calcination temperature of 200 ℃ and a calcination time of 4 h exhibited good alkylation activity： the sulfur content of less than 100 ℃ FCC naphtha fraction was reduced to 9.76 mg/L from the original of 82.38 mg/L; the sulfur content of 100---120℃ fraction was reduced to 65.03 mg/L from the original of 183.27 mg/L; the sulfur content of over 120℃ fraction was increased to 436.39 mg/L from the original of 257.31 mg/L, which indicated that the sulfur containing species were transferred to the heavy fractions during alkylation reactions, and this was also supported by the results of gas chromatographic analysis.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2010年第7期18-22,共5页
Petroleum Processing and Petrochemicals
关键词
催化剂
磷钨酸
烷基化
汽油
负载
catalyst： phosphotungstic acid
alkylation
gasoline
load
作者简介
作者简介：刘刚，在读硕士研究生，主要从事油品分析和汽油脱硫方面的研究工作。
