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Kinetics with deactivation of methylcyclohexane dehydrogenation for hydrogen energy storage

Abstract

The methylcyclohexane dehydrogenation step to recycle toluene and release hydrogen is being studied as part of a hydrogen energy storage project. The reaction is performed catalytically in a fixed bed reactor, and the efficiency of this step significantly determines overall system economics. The fresh catalyst kinetics and the deactivation of the catalyst by coke play an important role in the process analysis. The main reaction kinetics were determined from isothermal experiments using a parameter sensitivity analysis for model discrimination. An activation energy for the main reaction of 220{+-}11 kJ/mol was obtained from a two-parameter model. From non-isothermal deactivation in PC-controlled integral reactors, an activation energy for deactivation of 160 kJ/mol was estimated. A model for catalyst coke content of 3-17 weight% was compared with experimental data. (author) 3 figs., 6 refs.
Authors:
Maria, G; Marin, A; Wyss, C; Mueller, S; Newson, E [1] 
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
Publication Date:
Jun 01, 1997
Product Type:
Miscellaneous
Report Number:
ETDE/CH-mf-97750556
Reference Number:
SCA: 080201; PA: CH-97:0E0198; EDB-97:090514; SN: 97001800469
Resource Relation:
Other Information: PBD: 1997; Related Information: Is Part Of Paul Scherrer Institut annual report 1996. Annex V: PSI general energy technology newsletter 1996; Daum, C.; Leuenberger, J. [eds.]; PB: 125 p.
Subject:
08 HYDROGEN FUEL; HYDROGEN STORAGE; CYCLOALKANES; DEHYDRATION; CATALYSTS; INACTIVATION; CHEMICAL REACTION KINETICS; TOLUENE; EXPERIMENTAL DATA
OSTI ID:
492030
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Other: ON: DE97750556; TRN: CH97E0198
Availability:
OSTI as DE97750556
Submitting Site:
CH
Size:
pp. 24-26
Announcement Date:

Citation Formats

Maria, G, Marin, A, Wyss, C, Mueller, S, and Newson, E. Kinetics with deactivation of methylcyclohexane dehydrogenation for hydrogen energy storage. Switzerland: N. p., 1997. Web.
Maria, G, Marin, A, Wyss, C, Mueller, S, & Newson, E. Kinetics with deactivation of methylcyclohexane dehydrogenation for hydrogen energy storage. Switzerland.
Maria, G, Marin, A, Wyss, C, Mueller, S, and Newson, E. 1997. "Kinetics with deactivation of methylcyclohexane dehydrogenation for hydrogen energy storage." Switzerland.
@misc{etde_492030,
title = {Kinetics with deactivation of methylcyclohexane dehydrogenation for hydrogen energy storage}
author = {Maria, G, Marin, A, Wyss, C, Mueller, S, and Newson, E}
abstractNote = {The methylcyclohexane dehydrogenation step to recycle toluene and release hydrogen is being studied as part of a hydrogen energy storage project. The reaction is performed catalytically in a fixed bed reactor, and the efficiency of this step significantly determines overall system economics. The fresh catalyst kinetics and the deactivation of the catalyst by coke play an important role in the process analysis. The main reaction kinetics were determined from isothermal experiments using a parameter sensitivity analysis for model discrimination. An activation energy for the main reaction of 220{+-}11 kJ/mol was obtained from a two-parameter model. From non-isothermal deactivation in PC-controlled integral reactors, an activation energy for deactivation of 160 kJ/mol was estimated. A model for catalyst coke content of 3-17 weight% was compared with experimental data. (author) 3 figs., 6 refs.}
place = {Switzerland}
year = {1997}
month = {Jun}
}