EFFECT OF PRECIPITATION MEDIUM AND THERMAL-TREATMENT ON STRUCTURE AND TEXTURAL PROPERTIES OF CHROMIUM ORTHOPHOSPHATES

被引：9

作者：

BAUTISTA, FM ^{[1
]}

CAMPELO, JM ^{[1
]}

GARCIA, A ^{[1
]}

LUNA, D ^{[1
]}

MARINAS, JM ^{[1
]}

URBANO, MR ^{[1
]}

机构：

[1] CORDOBA UNIV,FAC SCI,DEPT ORGAN CHEM,AVDA S ALBERTO MAGNO S-N,E-14004 CORDOBA,SPAIN

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 1993年 / 49卷 / 01期

关键词：

D O I：

10.1007/BF02084045

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：

The effect of the precipitation agent on the structure and textural properties of CrPO4 (Cr/P=1) catalYsts has been studied. Catalysts obtained in propylene oxide-aqueous ammonia exhibited higher thermal stability and, hence, greater surface areas and pore volumes than catalysts obtained in propylene oxide or aqueous ammonia exclusively. The former also showed a small,surface area decrease on increasing calcination temperature up to 1073 K. Nevertheless, calcination at 1273 K develops in all cases crystalline CrPO4, showing the beta-structure. Moreover, CrPO4 catalysts thermally treated below 1273 K only exhibited hydrogen bonded hydroxy groups (nu(O-H) congruent-to 3450 cm-1).

引用

页码：173 / 181

页数：9

共 18 条

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