NICKEL PASSIVATION ON FLUIDIZED CRACKING CATALYSTS WITH DIFFERENT ANTIMONY COMPLEXES

被引：13

作者：

CORMA, A ^{[1
]}

GRANDE, MS ^{[1
]}

IGLESIAS, M ^{[1
]}

DELPINO, C ^{[1
]}

ROJAS, RM ^{[1
]}

机构：

[1] INST CIENCIA MAT, E-28006 MADRID, SPAIN

来源：

APPLIED CATALYSIS A-GENERAL | 1992年 / 85卷 / 01期

关键词：

ANTIMONY; COKING; FLUID CATALYTIC CRACKING; NICKEL; PASSIVATION;

D O I：

10.1016/0926-860X(92)80129-Z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

It has been observed that the deposition of nickel on FCC catalysts, whilst producing small changes on conversion (defined as the sum of the yields of gasoline+total gas+coke) produces a significant decrease in bottoms conversion. The influence of the sulphur plus phosphorus and the nature of other organic ligands in antimony complexes, on the nickel passivation ability during gas-oil cracking has been studied by comparing the results obtained using O,O,diethyldithiophosphate-, O,O,didecyldithiophosphate-, and ethyl-xanthate-Sb complexes, at two Sb/Ni ratios. The influence of the passivator on nickel on the surface has been discussed using results from X-ray photoelectron spectroscopy measurements. Finally, on unsupported samples, the different Ni-Sb phases formed have been studied by X-ray diffraction.

引用

页码：61 / 71

页数：11

共 14 条

[1]

BOHMER RW, 1991, ACS SYM SER, V452, P183

[2] NICKEL CONTAMINATION OF FLUIDIZED CRACKING CATALYSTS - A MODEL STUDY [J].