摘要
选用劣质重油裂化接触剂,采用BET,NH3-TPD,IR,SEM-EDX等手段对不同钙污染水平的接触剂进行表征分析,利用轻油微反装置测定不同钙污染量接触剂的微反活性指数,利用固定流化床评价装置对钙污染接触剂进行重油裂化性能评价。结果表明:接触剂经钙污染后其比表面积、孔体积有所下降,孔径分布变化不大,而总酸量、微反活性减少较多;环烷酸钙源污染钙可以进入到接触剂的体相中,且分布均匀;钙污染接触剂使塔河常压渣油裂化产物分布变化显著。
The contact cracking catalyst contaminated by different amount of calcium was studied by BET, NH3-TPD, FT-IR, SEM-EDX. The contaminated catalyst samples were evaluated in a micro-re- actor and a fixed-fluidized bed reactor. The results show that both the specific surface area and the pore volume decrease because of pollution. The total acid number and micro-activity of contaminated catalysts decrease even more. However, the pore size distribution suffers no changes. The calcium from calcium naphthenate deposits evenly in the bulk phase of the contact cracking catalysts. The calcium contamina- tion can make Tahe AR contact cracking product change significantly.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2014年第4期14-18,共5页
Petroleum Processing and Petrochemicals
基金
国家重点基础研究发展计划(973)项目(2012CB224801)
国家科技支撑计划项目(2012BAE05B05)
关键词
重油
钙
接触裂化
接触剂
裂化活性
heavy oil
calcium
contact cracking
contact catalyst
cracking activity
