Role of Periodic Input Composition and Sweeping Gas for Improvement of Hydrogen Production in a Palladium Membrane Reactor by Partial Oxidation of Methane

Chibane, Lemnouer; Djellouli, Brahim

doi:10.1016/s1004-9541(11)60222-x

Cited by 7 publications

(7 citation statements)

References 44 publications

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“…Its utilization is expected to increase in the future because of the weaker greenhouse gas effect (CO 2 release) compared to other fossil resources. However, it is well known that the direct conversion of methane yields less valuable petrochemical products and hence it is necessary to resort to an indirect process that initially involves the generation of synthesis gas (H 2 and CO) [1][2][3][4]. Synthesis gas is widely used in the production of hydrogen, synthetic fuels, alcohols and other chemicals.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Syngas/H2 Production via Partial Oxidation of CH4 Using (Ni, Co and Ni–Co)/ZrO2–Al2O3 Catalysts: Influence of Calcination Temperature

et al. 2019

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In this study, Ni, Co and Ni–Co catalysts supported on binary oxide ZrO2–Al2O3 were synthesized by sol-gel method and characterized by means of various analytical techniques such as XRD, BET, TPR, TPD, TGA, SEM, and TEM. This catalytic system was then tested for syngas respective H2 production via partial oxidation of methane at 700 °C and 800 °C. The influence of calcination temperatures was studied and their impact on catalytic activity and stability was evaluated. It was observed that increasing the calcination temperature from 550 °C to 800 °C and addition of ZrO2 to Al2O3 enhances Ni metal-support interaction. This increases the catalytic activity and sintering resistance. Furthermore, ZrO2 provides higher oxygen storage capacity and stronger Lewis basicity which contributed to coke suppression, eventually leading to a more stable catalyst. It was also observed that, contrary to bimetallic catalysts, monometallic catalysts exhibit higher activity with higher calcination temperature. At the same time, Co and Ni–Co-based catalysts exhibit higher activity than Ni-based catalysts which was not expected. The Co-based catalyst calcined at 800 °C demonstrated excellent stability over 24 h on stream. In general, all catalysts demonstrated high CH4 conversion and exceptionally high selectivity to H2 (~98%) at 700 °C.

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Section: Introductionmentioning

confidence: 99%

Highly Selective Syngas/H2 Production via Partial Oxidation of CH4 Using (Ni, Co and Ni–Co)/ZrO2–Al2O3 Catalysts: Influence of Calcination Temperature

et al. 2019

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“…The initial total molar flow is given as: (19) Because of kinetic limitations, zero cannot be used as a value for hydrogen partial pressure because it will give us infinite kinetics. To overcome this problem, a small quantity of hydrogen has to be used (F 0 H2 = 10 -10 mol/s).…”

Section: Chemical Reaction Scheme Kinetics and Mass Balancementioning

confidence: 99%

“…Thus, the intensification of technologies is designed to improve the process by acting on operated parameters. Running chemical reactors in unsteady state is one of the possible used technologies, especially the change of the reactant composition [19]. For a given process, some inputs are either fixed constants or can be controlled.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study of a Membrane Reactor for Ultrapure Hydrogen Recovery from Methanol Steam Reforming Reaction under Periodic Steady-State

Chibane

2017

Bull. Chem. React. Eng. Catal.

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Steam reforming of methanol over Cu/ZnO/Al2O3 catalyst was theoretically studied under created unsteady state. A mathematical approach was proposed to evaluate the effect of periodic inputs on reactor performance. The efficacy of the periodic separating reactor in term of pure hydrogen and of methanol conversion was measured during the reaction of methanol steam reforming. The obtained results showed that under certain operating conditions the periodic operation can be used advantageously to increase the reactor ability up to a level higher than the maximal steady-state. Moreover, our findings showed that the pumping of hydrogen through the membrane was stimulated by the effect of periodic operations. The predicted results suggested that the created unsteady state mode by using a square wave function could give the better performances compared to the sinusoidal mode.

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“…ACCEPTED MANUSCRIPT 11 mesh with an extremely fine mesh size was used at all interfaces to solve this system of equations.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…In this case, produced hydrogen permeates through the ceramic substrate-membrane and then the dehydrogenation equilibrium reaction shifts to ethylene production. In these reactors, palladium based membrane was used for hydrogen separation [9][10][11][12]. Recently, some researchers have focused on increasing the efficiency of dehydrogenation processes in FBCMRs.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrogen combustion reaction on the dehydrogenation of ethane in a fixed-bed catalytic membrane reactor

Hasany

Malakootikhah

Rahmanian

et al. 2015

Chinese Journal of Chemical Engineering

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Role of Periodic Input Composition and Sweeping Gas for Improvement of Hydrogen Production in a Palladium Membrane Reactor by Partial Oxidation of Methane

Cited by 7 publications

References 44 publications

Highly Selective Syngas/H2 Production via Partial Oxidation of CH4 Using (Ni, Co and Ni–Co)/ZrO2–Al2O3 Catalysts: Influence of Calcination Temperature

Highly Selective Syngas/H2 Production via Partial Oxidation of CH4 Using (Ni, Co and Ni–Co)/ZrO2–Al2O3 Catalysts: Influence of Calcination Temperature

Simulation Study of a Membrane Reactor for Ultrapure Hydrogen Recovery from Methanol Steam Reforming Reaction under Periodic Steady-State

Effect of hydrogen combustion reaction on the dehydrogenation of ethane in a fixed-bed catalytic membrane reactor

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