摘要
采用磷元素改性高岭土型流化床催化裂化(FCC)催化剂,热重-程序升温脱附(TG-TPD)和红外(IR)酸性测试结果表明,磷改性的催化剂,能够降低催化剂总酸量,弱酸量和强酸量,可增加中强酸的酸量,可以降低催化剂的B酸强度和L酸中心数。在微反活性和小型固定流化床装置上评价了磷改性催化剂的反应性能,经过磷改性的催化剂,可提高催化活性,增强重油转化能力,改善焦炭和汽油选择性。
A catalyst made from kaolin was modified with phosphorus and then tested. TG-TPD and IR analyses showed that the weak acidity, strong acidity, and total acidity of the catalyst modified decreased, and the intermediate strong acidity increased. It was found that with optimal phosphorus content, the number of Bronsted acidity and Lewis acid sites on catalyst decreased. The modified catalyst and contrast catalyst were evaluated in micro-activity test reactor and small-scale fixed fluidized bed reactor, and the results showed that the modified one presented significant improvement in activity ,conversion rate, light oil and gasoline as well as very deep bottom conversions, the gasoline and coke selectivity was good, too.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2005年第10期33-36,共4页
Modern Chemical Industry
关键词
催化裂化
催化剂
高岭土
磷改性
性能
FCC
catalyst
kaolin
phosphorus-modification
performance
