摘要
在实验室微型固定床装置上,考察了重油催化裂解过程中的裂解反应规律;通过分析正碳离子的生成与裂解反应特点,探讨了丙烯的生成规律。结果表明,转化率小于80%时的裂解反应,生成的正碳离子可高效裂解为丙烯,对丙烯产率的贡献在90%以上,是丙烯的主要来源;转化率大于80%时的裂解反应,生成的正碳离子裂解为丙烯的能力则大大下降,同时生成大量的干气和焦炭等非理想产品。
The cracking behavior and propylene formation during deep catalytic cracking of heavy oil was investigated by using a fixed-bed microreactor in laboratory. The behavior of forming and cracking of carbenium ions was analyzed and the reaction pathway of propylene formation was summarized. It was found that more than 90% of the propylene yield was attributed to the cracking of carbenium ions formed at conversions below 80% ,however,with the increase of conversion above 80%, the formation of propylene by the cracking of carbenium ions decreased significantly and the formation of dry gas and coke increased heavily.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2008年第12期28-32,共5页
Petroleum Processing and Petrochemicals
基金
国家重点基础研究基金资助项目(2006CB202501)
关键词
重油
催化裂解
丙烯
正碳离子
heavy oil
deep catalytic cracking
propylene
carbenium ion
