Preparation and characterization of new Mg-Al-Fe oxide catalyst precursors for dehydrogenation of ethylbenzene in the presence of carbon dioxide

被引：41

作者：

Kustrowski, P

Rafalska-Lasocha, A

Majda, D

Tomaszewska, D

Dziembaj, R

机构：

[1] Jagiellonian Univ, Reg Lab Physicochem Anal & Struct Res, PL-30060 Krakow, Poland

[2] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland

来源：

SOLID STATE IONICS | 2001年 / 141卷

关键词：

Mg-Al-Fe oxide; hydrotalcite precursors; TG/SDTA; XRD; IR; ethylbenzene dehydrogenation; carbon dioxide;

D O I：

10.1016/S0167-2738(01)00752-4

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：

New catalysts based on hydrotalcite-like precursors (Mg-Fe and Mg-Al-Fe) were synthesized. The structure of catalyst precursors was confirmed by XRD, FT-IR and TG. Appearance of separate brucite phase was observed for Mg-Fe precursors with excess of Mg, while for Mg-Al-Fe precursors, increase in Al content led to a formation of MgAl2(OH)(8) and mixed Al-Fe hydroxides apart from hydrotalcite phase. During calcination, the hydrotalcite like precursors spread their surface area and transform into mixed oxide. The mixed oxides were applied in ethylbenzene (EB) dehydrogenation with CO,. The activity losses with time-on-stream were completely restored by oxygen pulses. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：237 / 242

页数：6

共 15 条

[1] Screening of catalysts in the oxidative dehydrogenation of ethylbenzene with carbon dioxide [J].