- 作者: 林龍輝 ; 趙桂蓉 ; 凌永健 等
- 中文摘要: The vanadium trapping effect of Mg and La containing additives in cracking catalyst contaminated with 2300ppm Ni and 4700ppm V has been analyzed by microactivity test (MAT) and imaging secondary ion mass spectrometry (SIMS). The results of SIMS imaging are consistent with cracking activity data and show that the La/spinel is a superior vanadium trap for the fluid catalytic cracking of hydrocarbons (FCC) operation. La/spinel serves as a dual function additive for both vanadium trap and SO/ sub x/ removal. The optimum amount of La/spinel added to the cracking catalyst is about 15% by weight. This results in an creased catalytic activity, an increase in gasoline yield, and a decrease in coke and gas factors. The MgAl/sub 2/ O/sub 4/ phase of Mg/Al/sub 2/O/sub 3/ additive is found capable of trapping vanadium while its MgO of Mg/Al/sub 2/ O/sub 3/ phase can migrate to zeolite particles (the active component of the FCC catalyst) that, in turn, causes a decline in the activity of that catalyst.
- 英文摘要: --
- 中文關鍵字: Sims; Microactivity Test; Vanadium; Cracking Catalyst; Ion Mass Spectrometry
- 英文關鍵字: 二次離子質譜儀;微活性測試;釩;裂解觸媒;離子質譜儀