DEACTIVATION OF FIXED-BED NICKEL HYDROGENATION CATALYSTS BY SULFUR

被引：27

作者：

POELS, EK ^{[1
]}

VANBEEK, WP ^{[1
]}

DENHOED, W ^{[1
]}

VISSER, C ^{[1
]}

机构：

[1] UNILEVER RES LABS VLAARDINGEN,3130 AC VLAARDINGEN,NETHERLANDS

来源：

FUEL | 1995年 / 74卷 / 12期

关键词：

NICKEL CATALYSTS; SULFUR POISONING; AROMATICS HYDROGENATION;

D O I：

10.1016/0016-2361(95)80011-6

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A series of fixed-bed nickel hydrogenation catalysts was tested in the dearomatization of hydrocarbon solvents. The mechanism of catalyst deactivation by aromatic sulfur compounds was studied in high-pressure micro-flow equipment by variation of the experimental conditions and the sulfur content of the feed. It is concluded that catalyst deactivation proceeds under mild but realistic conditions through formation of a surface sulfide which blocks the active surface. The rate of the disappearance of the active sites is a first-order process with rate constant 1.0 x 10(-3) (ppm S)(-1) h(-1). Under more severe conditions, more sulfide layers are formed, but bulk Ni3S2 was not observed even after full deactivation of the catalysts. The poisoning of the active sites in the latter case is no longer a first-order process. Consequently, under the circumstances investigated, the sulfur resistance of nickel catalysts is determined by the nickel surface area per unit weight of catalyst.

引用

页码：1800 / 1805

页数：6

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