Enhancement of methanol production in a novel fluidized-bed hydrogen-permselective membrane reactor in the presence of catalyst deactivation

Rahimpour, Mohammad Reza; Elekaei, H.

doi:10.1016/j.ijhydene.2008.12.009

Cited by 42 publications

(10 citation statements)

References 26 publications

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“…Velardi and Barresi (2002) proposed a multi-stage methanol reactor network with autothermal behavior to promote reactor performance. To improve the performance of the methanol reactor, a number of configurations have been proposed including conventional dual-type reactor (Rahimpour, 2008;Rahimpour and Lotfinejad, 2008a), fixed bed with hydrogen permselective membrane reactors Rahimpour and Ghader, 2004), membrane dual-type reactor (Rahimpour andLotfinejad, 2007, 2008b; Rahimpour and Alizadehhesari, 2009), fluidized-bed reactor (Wagialla and Elnashaie, 1991), fluidized-bed membrane dual-type reactors (Rahimpour and Alizadehhesari, 2008;Rahimpour and Elekaei, 2009; and cascade fluidized-bed membrane reactor .…”

Section: Literature Reviewmentioning

confidence: 99%

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Dynamic simulation of a cascade fluidized-bed membrane reactor in the presence of long-term catalyst deactivation for methanol synthesis

Rahimpour

Bayat

Rahmani

2010

Chemical Engineering Science

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Section: Literature Reviewmentioning

confidence: 99%

“…Using a fluidized-bed concept in gas-cooled reactor has been considered by Rahimpour and Alizadehhesari (2008). Moreover, proficiency of this reactor in the presence of long-term catalyst deactivation has been investigated by Rahimpour and Elekaei (2009).…”

Section: Process Deficiencies and Modificationsmentioning

confidence: 99%

Dynamic simulation of a cascade fluidized-bed membrane reactor in the presence of long-term catalyst deactivation for methanol synthesis

Rahimpour

Bayat

Rahmani

2010

Chemical Engineering Science

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“…Rahimpour and Elekaei modeled a bubbling fluidizedbed membrane dual-type methanol reactor considering long-term deactivation of CuO/ZnO/Al 2 O 3 catalyst. In the proposed process, the feed stream is preheated in the tubes of the gas cooled reactor and hydrogen is penetrated from feed into the reaction side through the membrane [19]. The outlet feed from gas cooled reactor is fed to tubes of the water cooled reactor.…”

Section: Introductionmentioning

confidence: 99%

Dynamic optimization of methanol synthesis section in the dual type configuration to increase methanol production

Masoudi

Farsi

Rahimpour

2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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The main object of this research is dynamic modeling and optimization of the methanol synthesis section in the dual type configuration considering catalyst deactivation to improve methanol production capacity. In the methanol unit, deactivation of CuO/ZnO/Al 2 O 3 catalyst by sintering and low equilibrium conversion of reactions limit the production capacity, and changing operating temperature is a practical solution to overcome the production decay. In the first step, the considered process is modeled based on the mass and energy balance equations at dynamic condition. To prove the accuracy of developed model, the simulation results are compared with the plant data at the same operating conditions. In the second step, a dynamic optimization problem is formulated, and the optimal trajectories of manipulated variables are determined considering methanol production rate as the objective function. Finally, the performance of optimized process is compared with the conventional system at the same design conditions. The results show that operating at the optimal conditions increases methanol production capacity about 6.45%. Nomenclature aActivity of catalyst (-) A C Cross section area of each tube (m 2 ) CtTotal concentration (mol m À3 ) C p Specific heat of the gas at constant pressure (J mol À1 K À1 ) DDiameter (m) E d Activation energy used in the deactivation model (J mol À1 ) F t Total molar flow rate (mol s À1 ) f i Partial fugacity of component i (bar) K i Adsorption equilibrium constant for component i (bar À1 ) K p Equilibrium constant based on partial pressure for component i (-) k 1 Reaction rate constant for the first rate equation (mol kg À1 s À1 bar À1/2 ) k 2 Reaction rate constant for the second rate equation (mol kg À1 s À1 bar À1/2 ) k 3 Reaction rate constant for the third rate equation (mol kg À1 s À1 bar À1/2 ) K d Deactivation constant (h À1 ) P Total pressure (bar) r 1Rate of reaction for hydrogenation of CO (mol kg À1 s À1 ) r 2 Rate of reaction for hydrogenation of CO 2 (mol kg À1 s À1 ) r 3Reversed water-gas shift reaction (mol kg À1 s À1

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“…Also, the factors affecting the production rate in industrial methanol reactors are parameters such as thermodynamic equilibrium limitations, catalyst deactivation and variation in stoichiometric proportion. Since methanol synthesis is a high exothermic reaction ðDH o 298 ¼ À90:97 kJ mol À1 Þ, and the conversion of the synthesis gas (CO þ H 2 ) must be controlled at a low level in order to avoid possible overheating of the catalyst bed, the economic efficiency of the traditional gas phase methanol synthesis is unsatisfied (Wang et al, 2005;Rahimpour et al, 2008;Zhai et al, 2008;Rahimpour and Elekaei, 2009).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of CO conversion in a novel slurry bubble column reactor for methanol synthesis

Salehi

Jokar

Shariati

et al. 2014

Journal of Natural Gas Science and Engineering

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Enhancement of methanol production in a novel fluidized-bed hydrogen-permselective membrane reactor in the presence of catalyst deactivation

Cited by 42 publications

References 26 publications

Dynamic simulation of a cascade fluidized-bed membrane reactor in the presence of long-term catalyst deactivation for methanol synthesis

Dynamic simulation of a cascade fluidized-bed membrane reactor in the presence of long-term catalyst deactivation for methanol synthesis

Dynamic optimization of methanol synthesis section in the dual type configuration to increase methanol production

Enhancement of CO conversion in a novel slurry bubble column reactor for methanol synthesis

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