Numerical modelling for the solar driven bi-reforming of methane for the production of syngas in a solar thermochemical micro-packed bed reactor

Lima, Katarina Pereira Mendes de; Dias, Vitória da Fonseca; Silva, Jornandes Dias da

doi:10.1016/j.ijhydene.2019.08.241

Cited by 30 publications

(18 citation statements)

References 58 publications

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“…[21][22][23] Few studies on thermodynamic analysis were also reported in the literature to evaluate the impact of temperature, pressure and feed composition on conversion and yield. 14,24,25 From these studies, it was observed that more than 99% methane conversion was achieved at temperatures above 850 C.…”

Section: Introductionmentioning

confidence: 95%

Greener process for syngas cogeneration: Bi‐reforming of methane coupled with chemical looping combustion

Alam

Sumana

2021

Intl J of Energy Research

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A greener, self-sustainable and integrated process has been proposed in this paper to produce syngas through chemical looping combustion (CLC) coupled bi-reforming of methane (BRM) with CO 2 for the first time . The proposed process scheme is advantageous in several folds, that is, it consumes two major greenhouse gases, overcomes the drawback of catalyst deactivation caused by coke formation and it can produce syngas gas with an H 2 /CO molar ratio of 2 as required for methanol synthesis processes. Further, integration of BRM with CLC, helps to fulfil the endothermic heat demand and CO 2 feed requirement of BRM. Further, the process is made self-sustainable with the incorporation of heat recovery and steam generation and power generation sections.Steady-state plant-wide models have been developed for the proposed integrated CLC-BRM process using ASPEN Plus software and detailed thermodynamic analysis has been performed. Rigorous sensitivity analysis has resulted in 98.2% CH 4 conversion, H 2 and CO yields of 93.6%, 93.9% respectively with a syngas ratio of ≈ 2 at the bi-reformer conditions of 850 C and 1 atm. The optimal steam and CO 2 input flowrates for bi-reforming of 1 kmol/hour CH 4 are found to be 0.8 and 0.4 kmol/h respectively, which are fulfilled by CLC integration. The performance of the proposed scheme is further compared with a conventional bi-reforming process that uses a combustor for energy supply.The results demonstrate the feasibility and potential pay-offs of the CLC-BRM scheme in terms of increased energy efficacy and eco-friendliness.

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Section: Introductionmentioning

confidence: 95%

Greener process for syngas cogeneration: Bi‐reforming of methane coupled with chemical looping combustion

Alam

Sumana

2021

Intl J of Energy Research

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“…20 • No. 1 • March 2021 • p. 03-11 reforming of hydrocarbons, biomass gasification, coal gasification, electrolytic, and biological (Lima et al, 2020;Anjos et al, 2020). The production of H2 in packed bed reformers is still attracting the interest of researchers and engineers.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modelling of the Endothermic Process of the Steam Reforming of Methane in a Fixed Bed Reformer

Dessaune¹,

Dias²,

Silva³

2021

RETERM

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Thermochemical Packed-Bed (TPB) reformer has been substantially studiedin the past years as a promising equipment to investigate thethermochemical conversion of methane (CH4). This work has as mainobjective a theoretical modelling to describe the process variables of SteamReforming of Methane (SRM) method in the TPB reformer. The TPBreformer is filled with β-SiC open-cell foam where the thermochemicalconversion of CH4 is carried out. The model variables describe the specificaims of work and these objectives can be identified from each equation ofthe developed mathematical model. This work has been proposed to studytwo specific aims as (i) the effective thermal conductivity's effect of thesolid phase (λs,eff.) and (ii) molar flows of chemical components. Theendothermic reaction temperature's profiles are notably increased as thenumeral value of λs,eff. is raised. The Steam Reforming of Methane (SRM)method is suggested to improve the Production Rate (PR) of H2 regardingthe PR of CO. As results, the PR of H2 is of 29.48% while the PR of CO isof 2.76%.

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“…Other solar thermochemical applications for hydrogen production have also been reported [60][61][62][63][64]. Water splitting through concentrated solar energy with an oxygen-permeable membrane was analyzed [65].…”

Section: Introductionmentioning

confidence: 99%

Variation of the Number of Heat Sources in Methane Dry Reforming: A Computational Fluid Dynamics Study

Lee

Lim

2021

International Journal of Chemical Engineering

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To overcome the weak point of the gas type heating (failure in heating uniformly and persistently), liquid type molten salt as a concentration of solar energy was considered as a heat source for dry reforming. This high-temperature molten salt flowing through the center of the tubular reactor supplies necessary heat. The dependence on the number of heat source of the hydrogen production was investigated under the assumption of the fixed volume of the catalyst bed. By changing these numbers, we numerically investigated the methane conversion and hydrogen flow rate to find the best performance. The results showed that the methane conversion performance and hydrogen flow rate improved in proportion to the number of heating tubes. For the one heat source, the reactor surrounded by a heat source rather than that located in the center is the best in terms of hydrogen yield. In addition, this study considered the case in which the system is divided into several smaller reactors of equal sizes and a constant amount of catalyst. In these reactors, we saw that the methane conversion and hydrogen flow rate were reduced. The results indicate that the installation of as many heating tubes as possible is preferable.

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Numerical modelling for the solar driven bi-reforming of methane for the production of syngas in a solar thermochemical micro-packed bed reactor

Cited by 30 publications

References 58 publications

Greener process for syngas cogeneration: Bi‐reforming of methane coupled with chemical looping combustion

Greener process for syngas cogeneration: Bi‐reforming of methane coupled with chemical looping combustion

Numerical Modelling of the Endothermic Process of the Steam Reforming of Methane in a Fixed Bed Reformer

Variation of the Number of Heat Sources in Methane Dry Reforming: A Computational Fluid Dynamics Study

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