Comparison of different catalysts in the membrane-supported dehydrogenation of propane

Schäfer, Ronald; Noack, Manfred; Kölsch, Peter; Stöhr, Marion; Caro, Juergen

doi:10.1016/s0920-5861(03)00198-6

Cited by 62 publications

(32 citation statements)

References 32 publications

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“…Silica derived membranes have proved to be stable for over 2000 h operating at 500°C [1] using dry gas mixtures, as well as for H 2 /CO 2 separation [2,3], dehydrogenation of propane [4][5][6] and cyclohexane [7,8], and H 2 separation from syngas generated in the water gas shift reaction [9,10] among several examples. Although pure silica has excellent thermal and chemical stability, they are hydrothermally unstable in the presence of steam [11,12], which is a major issue for the deployment of silica membranes for industrial applications involving wet gas separation.…”

Section: Introductionmentioning

confidence: 99%

Binary gas mixture and hydrothermal stability investigation of cobalt silica membranes

Liu

Wang

Martens

et al. 2015

Journal of Membrane Science

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a b s t r a c tThis work investigates the influence of hydrothermal exposure on the separation performance of sol-gel derived cobalt oxide silica membranes for both single gases (He, H 2 , CO 2 and N 2 ) and binary gas mixtures (He/CO 2 ). The surface area of the materials slightly decreased after exposed to 25 mol% water vapour at 550°C for 100 h. The membranes complied with activation transport mechanism before and after hydrothermal treatment (HT), and for both single gas and gas mixture permeation. Best values were achieved for He permeance of 3.3 Â 10 À 7 mol m À 2 s À 1 Pa À 1 at 500°C and permselectivity of 479 for He/CO 2 . After HT, the permeance of He and H 2 decreased by 28% and 22% at 500°C, respectively, while the permeance of CO 2 increased and resulting in a lower He/CO 2 permselectivity of 190. For gas mixtures, the He purity in the permeate side increased from 62% to 97% at 200°C when the He feed molar concentration increased from 10% to 50% before HT. The He permeance remained unchanged with respect to He feed concentrations and was unaffected by the presence of CO 2 , although a reduction of He permeance was observed after HT exposure. The He purity in the permeate side was similar before and after HT exposure as a function of the He concentration in the feed side. Hence, the membrane matrix underwent densification though the overall pore size distribution did not broaden after hydrothermal treatment.

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Section: Introductionmentioning

confidence: 99%

Binary gas mixture and hydrothermal stability investigation of cobalt silica membranes

Liu

Wang

Martens

et al. 2015

Journal of Membrane Science

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“…In particular, several industrially relevant partial oxidation reactions were investigated. Relevant studies were performed, for example, for the oxidative coupling of methane Diakov, Lafarga, and Varma, 2001 ;Tonkovich et al , 1996a ), for the partial oxidation of ethane (Al -Juaied, Coronas, Menendez, and Santamaria, 1995 ;Klose et al , 2004a ;Klose et al , 2003a ;Wang et al , 2006 ) and propane (Caro, 2006 ;Grabowski, 2006 ;Liebner et al , 2003 ;Ramos, Menendez, and Santamaria, 2000 ;Sch ä fer et al , 2003 ;Ziaka, Minet, and Tsotsis, 1993 ) and for the oxidative dehydrogenation (ODH) of butane (Alonso et al , 2001 ;Mallada et al , 2000b ;Tellez, Menendez, and Santamaria, 1997 ).…”

Section: Introductionmentioning

confidence: 99%

Packed‐Bed Membrane Reactors

et al. 2010

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“…However, as a result of the hydrogen removal, coking is promoted and after ca. 2 h time on stream the olefin yield of the membrane reactor drops below that of the classical fixed bed (Schäfer et al, 2003). After an oxidative regeneration the activity and selectivity are restored completely.…”

Section: Zeolite Membranes In Membrane Reactorsmentioning

confidence: 91%

Zeolite Membranes: From the Laboratory Scale to Technical Applications

2005

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Current trends and novel concepts in R&D of zeolite membranes like the seeding supported crystallization and the preparation of Al-containing zeolite membranes are discussed. The influences of adsorption and diffusion on the permeation properties of zeolite membranes are considered. Dehydration of ethanol by steam permeation and pervaporation as the first zeolite membrane based industrial separation is presented. Membrane supported dehydrogenation and esterification are discussed as possible applications of a catalytic membrane reactors.

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Comparison of different catalysts in the membrane-supported dehydrogenation of propane

Cited by 62 publications

References 32 publications

Binary gas mixture and hydrothermal stability investigation of cobalt silica membranes

Binary gas mixture and hydrothermal stability investigation of cobalt silica membranes

Packed‐Bed Membrane Reactors

Zeolite Membranes: From the Laboratory Scale to Technical Applications

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