LAYERED ZIRCONIUM-TIN PHOSPHATES .2. CATALYTIC PROPERTIES IN THE OXYDEHYDROGENATION OF ETHYLBENZENE TO STYRENE

被引：23

作者：

BAGNASCO, G

CIAMBELLI, P

TURCO, M

LAGINESTRA, A

PATRONO, P

机构：

[1] UNIV FEDERICO II NAPOLI, DIPARTIMENTO INGN CHIM, NAPELS, ITALY

[2] UNIV FEDERICO II NAPOLI, DIPARTIMENTO CHIM, NAPLES, ITALY

[3] UNIV ROME LA SAPIENZA, DIPARTMENTO CHIM, I-00185 ROME, ITALY

[4] CNR, INISTITUTO METODOL AVANZATE INORGAN, ROME, ITALY

来源：

APPLIED CATALYSIS | 1991年 / 68卷 / 1-2期

关键词：

ETHYLBENZENE OXYDEHYDROGENATION; LAYERED PHOSPHATES; ACIDITY; ACTIVE COKE;

D O I：

10.1016/S0166-9834(00)84094-4

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：

Zirconium-tin mixed phosphates have been studied as catalysts for the oxydehydrogenation of ethylbenzene to styrene at T = 400-500-degrees-C and atmospheric pressure. It has been found that these mixed compounds are much more active than pure zirconium and tin phosphates. Ethylbenzene conversion of ca. 50% with selectivity to styrene up to 90% has been obtained, the by-products being mainly CO(x) with lower amounts of benzaldehyde. The effect of operating parameters, such as contact time, reaction temperature and feeding ratio, has been the subject of a preliminary investigation. A reaction scheme is proposed in order to interpret these results. The influence of surface acidity on the reaction through the formation of a catalytically active coke is discussed.

引用

页码：69 / 79

页数：11