| 本文已被：浏览次 下载次 |
码上扫一扫！ |
|
|
|
| Effect of lanthanum modification on physico-chemical properties and nitrogen-resistant performance of FCC catalysts |
|
YUAN Qi-min, ZHANG Zhao-tao, LI Chun-yi, YANG Chao-he,SHAN Hong-hong
|
|
(State Key Laboratory of Heavy Oil Processing in China University of Petroleum, Dongying 257061，Shandong Province, China )
|
| Abstract: |
| Several catalytic cracking catalysts modified with lanthanum were prepared by impregnation or blending method. The physico-chemical properties were characterized by BET and FT-IR spectroscopy of adsorbed pyridine, and the nitrogen-resistant performance of samples were investigated on a micro-activity test unit with Daqing and Dagang coking vacuum gas oil ( VGO) as feedstocks, respectively. The results show that the total acidities and nitrogen-resistant performance of FCC catalysts modified with lanthanum are apparently improved，and vary greatly with the ways of lanthanum modification. The nitrogen-resistant performance of catalyst impregnated with lanthanum is remarkably superior to that of other catalysts. Meanwhile, the results also show that the difference of nitrogen-resistant performance of catalysts mainly depends on their total acidities. |
| Key words: catalytic cracking basic nitrogen compounds nitrogen-resistant performance coking VGO |
|
|