HIGH-RESOLUTION ELECTRON-MICROSCOPY OF SPENT NI-MO/AL2O3 HYDROTREATING CATALYSTS

被引：37

作者：

VANDOORN, J

MOULIJN, JA

DJEGAMARIADASSOU, G

机构：

[1] UNIV AMSTERDAM, INST CHEM TECHNOL, 1018 WV AMSTERDAM, NETHERLANDS

[2] UNIV PARIS 06, REACT SURFACE & STRUCT LAB, F-75252 PARIS 05, FRANCE

来源：

APPLIED CATALYSIS | 1990年 / 63卷 / 01期

关键词：

catalyst characterization (HREM); coke deposition; hydrotreating catalysts; Keywords: nickel-molybdenum/alumina; residual oil; upgraded oil;

D O I：

10.1016/S0166-9834(00)81707-8

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：

High-resolution electron microscopy of a sulfided alumina-supported nickel-molybdenum catalyst showed that the molybdenum sulfide is present in multi-layered slabs. In spent catalysts the molybdenum sulfide is predominantly in the form of single or double-layered slabs. Gasification of the carbon deposits on the spent catalysts with hydrogen resulted in an increased stacking. The carbonaceous material is not located at specific parts of the surface and consists of irregularly shaped cloudy structures. A morphological model of the catalyst in the working state is proposed. © 1990.

引用

页码：77 / 90

页数：14

共 27 条

[1] TEMPERATURE-PROGRAMMED REDUCTION OF COO-MOO3/AL2O3 CATALYSTS [J].