Kinetics study and modelling of steam methane reforming process over a NiO/Al2O3 catalyst in an adiabatic packed bed reactor

Abbas, Syed Zaheer; Dupont, Valerie; Mahmud, Tariq

doi:10.1016/j.ijhydene.2016.11.093

Cited by 153 publications

(75 citation statements)

References 37 publications

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“…2b) could be attributed to mass transfer and kinetic limitations, and to loss of sorbent capacity over time. Kinetic limitations can be overcome by operating at higher temperature, whilst mass transfer limitations can be mitigated by reducing the particle size of the bed materials (catalyst/OC and sorbent) to such a size that there will be no diffusion effect [45] and/or by decreasing the gas hourly space velocity, thus increasing the residence time of the reactions [47].…”

Section: Comparison Of Se-sr With C-sr and With Chemical Equilibriummentioning

confidence: 99%

“…Hydrocarbons are the major feedstock in steam reforming process for the generation of H2 and synthesis gas [44]. Approximately, 90 % of the global H2 generated originates from conversion of fossil fuels [45]. A boom in shale gas production [13] and unconventional gas resources in the world such as hydrates foresees that gas will remain the main feedstock of steam reforming in the near term.…”

Section: Introductionmentioning

confidence: 99%

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Steam reforming of shale gas with nickel and calcium looping

Adiya

Dupont

Mahmud

2019

Fuel

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ReuseThis article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND) licence. This licence only allows you to download this work and share it with others as long as you credit the authors, but you can't change the article in any way or use it commercially. More information and the full terms of the licence here: https://creativecommons.org/licenses/ TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. AbstractsHigh purity H2 production from shale gas using sorption enhanced chemical looping steam reforming (SE-CLSR) was investigated at 1 bar, GHSV 0.498 hr -1 , feed molar steam to carbon ratio of 3 and 650 for 20 reduction-oxidation-calcination cycles using CaO and 18 wt. % NiO on Al2O3 as sorbent and catalyst/oxygen carrier (OC) respectively. The shale gas feedstock was able to cyclically reduce the oxygen carrier and subsequently reform with high H2 yield and purity. For example H2 yield of 31 wt. % of fuel feed and purity of 92 % were obtained in the 4 th cycle during the pre-breakthrough period (prior to cycles with low sorbent capacity). This was equivalent to 80 and 43 % enhancement compared to the conventional steam reforming process respectively.

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Section: Comparison Of Se-sr With C-sr and With Chemical Equilibriummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Steam reforming of shale gas with nickel and calcium looping

Adiya

Dupont

Mahmud

2019

Fuel

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“…For the methanol fuels considered in the present study, the reforming process results in the production of hydrogen and carbon monoxide in accordance with

C H_{3} italicOH \to 2 H_{2} + CO, ∆ H_{298 K} = + 90.1 ((), italicKJ \cdot {mole}^{- 1}) .

The carbon monoxide is subjected to a WGS reaction to produce carbon dioxide and reduce the water to hydrogen, ie,

italicCO + H_{2} O \to H_{2} + normalC O_{2}, ∆ H_{298 K} = - 41.2 ((), italicKJ \cdot {mole}^{- 1}) .

The overall methanol‐steam reforming reaction can thus be given as

C H_{3} italicOH + H_{2} O \to C O_{2} + 3 H_{2}, ∆ H_{298 K} = 49.47 ((), italicKJ \cdot {mole}^{- 1}) .

The methanol‐steam reforming reaction method has a low cost and a high hydrogen production efficiency. As a result, the literature contains many investigations into the design and optimization of methanol‐steam reforming reaction, including the choice of catalyst materials to facilitate low‐temperature reaction, the internal design of the reformation reactor, and the external heat source used to drive the reaction process . The present study performs numerical simulations to identify the methanol fuel mixture and operating conditions (ie, fuel flow rate and reaction temperature) which maximize the hydrogen concentration of the reformate gas produced in the methanol‐steam reforming reaction.…”

Section: Steam Reforming Reactor Designmentioning

confidence: 99%

“…As a result, the literature contains many investigations into the design and optimization of methanol-steam reforming reaction, including the choice of catalyst materials to facilitate low-temperature reaction, 11 the internal design of the reformation reactor, 12 and the external heat source used to drive the reaction process. 13 The present study performs numerical simulations to identify the methanol fuel mixture and operating conditions (ie, fuel flow rate and reaction temperature) which maximize the hydrogen concentration of the reformate gas produced in the methanol-steam reforming reaction.…”

Section: Endothermic Methanol-steam Reforming Reactionmentioning

confidence: 99%

Numerical investigation into hydrogen content of reformate gas produced by methanol‐water fuel mixtures in reforming

Kuo

Wei

2019

Int J Energy Res

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Summary MATLAB/Simulink simulations are performed to investigate the hydrogen molar fraction of the reformate gas produced by four methanol‐water fuel mixtures with molar ratios of 50%:50%, 62%:38%, 75%:25%, and 100%:0%, respectively. The simulations utilize the Thermolib module and investigate the hydrogen reforming performance of the four fuels for fuel flow rates in the range of 0.1 to 1 mol · min−1 and reaction temperatures ranging from 500 to 1000 K. The results show that the hydrogen molar fraction of the reformate gas decreases with an increasing methanol content. By contrast, for a given methanol concentration, the hydrogen molar fraction generally increases with an increasing flow rate and reaction temperature. Overall, the results show that the maximum hydrogen molar fraction (73.10%) is obtained using the 50%MeOH:50% water fuel mixture with a flow rate of 0.5 mol · min−1 and a reaction temperature of 800 K.

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“…In the tube side, steam and natural gas are mixed and converted to the syngas on the catalyst surface based on the following reactions [15]:…”

Section: 4tube Gas Phasementioning

confidence: 99%

Modeling and simulation of an integrated steam reforming and nuclear heat system

Hoseinzade

Adams

2017

International Journal of Hydrogen Energy

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The following article is a "pre-print" of an article accepted for publication in an Elsevier journal.Hoseinzade L, Adams TA II. Modeling and simulation of an integrated steam reforming and nuclear heat system. International Journal of Hydrogen Energy 42 (2017) pp. 25048-25062The pre-print is not the final version of the article. It is the unformatted version which was submitted for peer review, but does not contain any changes made as the result of reviewer feedback or any editorial changes. Therefore, there may be differences in substance between this version and the final version of record.The final, official version of the article can be downloaded from the journal's website via this DOI link when it becomes available (subscription or purchase may be required): AbstractIn this study, a dynamic and two-dimensional model for a steam methane reforming process integrated with nuclear heat production is developed. The model is based on first principles and considers the conservation of mass, momentum and energy within the system. The model is multiscale, considering both bulk gas effects as well as spatial differences within the catalyst particles. Very few model parameters need to be fit based on the design specifications reported in the literature. The resulting model fits the reported design conditions of two separate pilot-scale studies (ranging from 0.4 to 10 MW heat transfer duty). A sensitivity analysis indicated that disturbances in the helium feed conditions significantly affect the system, but the overall system performance only changes slightly even for the large changes in the value of the most uncertain parameters.

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Kinetics study and modelling of steam methane reforming process over a NiO/Al2O3 catalyst in an adiabatic packed bed reactor

Cited by 153 publications

References 37 publications

Steam reforming of shale gas with nickel and calcium looping

Steam reforming of shale gas with nickel and calcium looping

Numerical investigation into hydrogen content of reformate gas produced by methanol‐water fuel mixtures in reforming

Modeling and simulation of an integrated steam reforming and nuclear heat system

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