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2013•Kinetics and CatalysisRequires access

Catalytic behavior of decomposed molybdophosphoric acid supported on alumina for oxidative dehydrogenation of ethane to ethylene

A. Sri Hari Kumar, V. Narayana Kalevaru, A. Qiao, Ahmad S. Alshammari, N. Lingaiah, Ch. Sailu, P. S. Sai Prasad, Andreas Martin

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Abstract

Oxidative dehydrogenation of ethane (ODHE) to ethylene was investigated over a series of alumina supported molybdophosphoric acid (MPA) catalysts. The MPA was transformed into surface Mo oxides on Al 2 O 3 when subjected to calcination at 600°C. The catalysts were characterized by N 2 -adsorption, XRD, FT-IR spectroscopy and TPR techniques. The results showed that MPA loading and the source of Mo precursor had a clear influence on the catalytic performance. The evaluation of the catalysts for ODHE at temperatures between 450 and 550°C revealed superior ethane conversion ( X ∼24%) and ethylene selectivity ( S = ca. 65%) over 20 wt % MPA/Al 2 O 3 catalyst. The transformation of MPA into finely dispersed Mo oxides on Al 2 O 3 appeared to be responsible for this improved performance.

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Oxidative dehydrogenation of ethane (ODHE) to ethylene was investigated over a series of alumina supported molybdophosphoric acid (MPA) catalysts. The MPA was transformed into surface Mo oxides on Al 2 O 3 when subjected to calcination at 600°C. The catalysts were characterized by N 2 -adsorption, XRD, FT-IR spectroscopy and TPR techniques. The results showed that MPA loading and the source of Mo precursor had a clear influence on the catalytic performance. The evaluation of the catalysts for ODHE at temperatures between 450 and 550°C revealed superior ethane conversion ( X ∼24%) and ethylene selectivity ( S = ca. 65%) over 20 wt % MPA/Al 2 O 3 catalyst. The transformation of MPA into finely dispersed Mo oxides on Al 2 O 3 appeared to be responsible for this improved performance.

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Available abstract

Oxidative dehydrogenation of ethane (ODHE) to ethylene was investigated over a series of alumina supported molybdophosphoric acid (MPA) catalysts. The MPA was transformed into surface Mo oxides on Al 2 O 3 when subjected to calcination at 600°C. The catalysts were characterized by N 2 -adsorption, XRD, FT-IR spectroscopy and TPR techniques. The results showed that MPA loading and the source of Mo precursor had a clear influence on the catalytic performance. The evaluation of the catalysts for ODHE at temperatures between 450 and 550°C revealed superior ethane conversion ( X ∼24%) and ethylene selectivity ( S = ca. 65%) over 20 wt % MPA/Al 2 O 3 catalyst. The transformation of MPA into finely dispersed Mo oxides on Al 2 O 3 appeared to be responsible for this improved performance.

Key concepts: Dehydrogenation, Catalysis, Calcination, Ethylene, Chemistry, Selectivity, Inorganic chemistry, Adsorption

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Catalytic behavior of decomposed molybdophosphoric acid supported on alumina for oxidative dehydrogenation of ethane to ethylene — Research Paper | ScholarLens