CHROMIUM-ALUMINUM ORTHOPHOSPHATES .2. EFFECT OF ALPO4 LOADING ON STRUCTURE AND TEXTURE OF CRPO4-ALPO4 (20-50-WT-PERCENT ALPO4 CATALYSTS OBTAINED IN AQUEOUS AMMONIA

被引：7

作者：

BAUTISTA, FM ^{[1
]}

CAMPELO, JM ^{[1
]}

GARCIA, A ^{[1
]}

LUNA, D ^{[1
]}

MARINAS, JM ^{[1
]}

ROMERO, AA ^{[1
]}

URBANO, MR ^{[1
]}

机构：

[1] UNIV CORDOBA,DEPT ORGAN CHEM,E-14004 CORDOBA,SPAIN

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 1994年 / 53卷 / 01期

关键词：

D O I：

10.1007/BF02070112

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 AlPO4 content in CrPO4-AlPO4 (CrAlP-A) systems has a marked influence on thermal behavior, speeding up the transformation of amorphous CrPO4 to crystalline beta-CrPO4. Thus, XRD analysis showed that amorphous systems are formed at AlPO4 loadings less than 50 wt.% and calcination temperatures below 1273 K. Moreover, on 50 wt.% AlPO4 developed crystalline beta-CrPO4 in CrAlP-A systems for every calcination temperature. Besides, at 1273 K crystalline systems (beta-CrPO4 and tridimite-AlPO4) are formed for every composition. Moreover, surface area at any calcination temperature increases with the rise in the AlPO4 content. Also, a surface area decrease on increasing calcination temperature is shown. Furthermore, CrAlP-A catalysts thermally treated below 1273 K only exhibited hydrogen bonded hydroxy groups (nu(O-H) similar or equal to 3450 cm(-1)).

引用

页码：45 / 53

页数：9

共 11 条

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