STUDY OF CO(OR NI)-MO OXIDE PHASE-TRANSFORMATION AND HYDRODESULFURIZATION CATALYSTS BY RAMAN MICRO-PROBE EQUIPPED WITH NEW CELLS

被引:62
作者
PAYEN, E [1 ]
DHAMELINCOURT, MC [1 ]
DHAMELINCOURT, P [1 ]
GRIMBLOT, J [1 ]
BONNELLE, JP [1 ]
机构
[1] UNIV SCI & TECH LILLE, ECOLE NATL SUPER CHIM LILLE, CNRS, ERA 458, F-59655VILLE ASCQ, FRANCE
关键词
SPECTROSCOPY; RAMAN;
D O I
10.1366/0003702824638953
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Heating cells used in optical microscopy are adapted to a laser Raman microprobe to an under air study of the solid phase transformation of cobalt and nickel molybates in which the molybdenum atoms are in tetrahedral oxygen environment ( left bracket a right bracket phase) or in octahedral environment ( left bracket b right bracket phase). In each case, the Co or Ni environment is octahedral. A newly designed controlled-atmosphere and temperature cell is described. It permits the study of several problems particularly those related to the reactivity of Co or Ni-Mo- gamma -Al//2O//3 hydrodesulfurization catalysts. Results on (1) sulfidation of the oxide precursor form catalysts by a H//2-H//2S mixture, (2) interaction with a model sulfided molecule; thiophene, and (3) pyridine chemisorption are reported.
引用
收藏
页码:30 / 37
页数:8
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