Chemical equilibrium analysis of hydrogen production from shale gas using sorption enhanced chemical looping steam reforming

Adiya, Zainab Ibrahim S G; Dupont, Valerie; Mahmud, Tariq

doi:10.1016/j.fuproc.2017.01.026

Cited by 50 publications

(23 citation statements)

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“…This follows from our previous study (S G Adiya el al [47]) which focused on the same materials and feedstock (NiO based catalyst / oxygen carrier (OC) and shale gas) and assessed via experiments the steam reforming of shale gas with and without chemical looping. The purpose of the study is to demonstrate the effect of coupling sorption enhacement (SE) and chemical looping (CL) in C-SR process in packed bed reactor using a realistic feedstock, as well as validate our previous thermodynamic equlibrium analysis in S G Adiya et al [9].…”

Section: Introductionmentioning

confidence: 84%

“…Catalytic steam reforming (C-SR) has emerged as the major technology for syngas production (in large scale) [2][3][4][5][6] in refining and petrochemical complexes [7] and steam methane reforming has become the most common method for large scale H2 production for years [8]. Despite having reached technological and commercial maturity, the C-SR process is still one of the most energy intensive processes for syngas production through its heating requirement with high operational and maintenance cost [1,9]. To generate high purity H2 and maximise yield, additional units such as water-gas shift (WGS) and separation units (such pressure swing adsorption, membrane or cryogenic technology) are included in a C-SR plant [10][11][12], making the process complex and economical only at large scales [11].…”

Section: Introductionmentioning

confidence: 99%

“…The latter (SE-CLSR process) also minimises the energy requirement of operating the system to a great extent by close-coupling the heat demand of H2 production with the heat released by the chemisorption of its CO2 by-product. Detail process description with schematics of the SE-SR and SE-CLSR process can be found in S G Adiya et al [9,43] and Ryden and Ramos [39].…”

Section: Introductionmentioning

confidence: 99%

“…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. The current development in oil and gas extraction such as drilling and fracking have made shale gas production economically viable [9]. Thus, additional techniques of gas consumption are also desirable due to its newfound albeit temporary abundance.…”

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: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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“…The S/C molar ratio is a significant parameter to determine reaction pathway of CH 4 and distribution of product in the CL-SMR process. Using large excess steam is undesirable, since high operating expenditures are required [60,61]. As demonstrated in this figure, by increasing the H 2 O/CH 4 ratio to 2, the CH 4 conversion and hydrogen yield were increased to 99.44% and 85.48%, respectively and further increase of H 2 O/CH 4 ratio, caused slight negative effect on the activity of OC due to the pore blockage of oxygen carriers at higher steam to carbon molar ratios [62,63].…”

Section: Life Time Investigation Of Different Yttrium Weight Percentagementioning

confidence: 99%

Hydrogen Production from Cyclic Chemical Looping Steam Methane Reforming over Yttrium Promoted Ni/SBA-16 Oxygen Carrier

et al. 2017

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Abstract:In this work, the modification of Ni/SBA-16 oxygen carrier (OC) with yttrium promoter is investigated. The yttrium promoted Ni-based oxygen carrier was synthesized via co-impregnation method and applied in chemical looping steam methane reforming (CL-SMR) process, which is used for the production of clean energy carrier. The reaction temperature (500-750 • C), Y loading (2.5-7.4 wt. %), steam/carbon molar ratio (1-5), Ni loading (10-30 wt. %) and life time of OCs over 16 cycles at 650 • C were studied to investigate and optimize the structure of OC and process temperature with maximizing average methane conversion and hydrogen production yield. The synthesized OCs were characterized by multiples techniques. The results of X-ray powder diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) of reacted OCs showed that the presence of Y particles on the surface of OCs reduces the coke formation. The smaller NiO species were found for the yttrium promoted OC and therefore the distribution of Ni particles was improved. The reduction-oxidation (redox) results revealed that 25Ni-2.5Y/SBA-16 OC has the highest catalytic activity of about 99.83% average CH 4 conversion and 85.34% H 2 production yield at reduction temperature of 650 • C with the steam to carbon molar ratio of 2.

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Recent Advances in Bimetallic Catalysts for Methane Steam Reforming in Hydrogen Production: Current Trends, Challenges, and Future Prospects

Yusuf,

Umar,

Kotob

et al. 2023

Chemistry An Asian Journal

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As energy demand continues to rise and the global population steadily grows, there is a growing interest in exploring alternative, clean, and renewable energy sources. The search for alternatives, such as green hydrogen, as both a fuel and an industrial feedstock, is intensifying. Methane steam reforming (MSR) has long been considered a primary method for hydrogen production, despite its numerous advantages, the activity and stability of the conventional Ni catalysts are major concerns due to carbon formation and metal sintering at high temperatures, posing significant drawbacks to the process. In recent years, significant attention has been given to bimetallic catalysts as a potential solution to overcome the challenges associated with methane steam reforming. Thus, this review focuses on the recent advancements in bimetallic catalysts for hydrogen production through methane steam reforming. The review explores various aspects including reactor type, catalyst selection, and the impact of different operating parameters such as reaction temperature, pressure, feed composition, reactor configuration, and feed and sweep gas flow rates. The analysis and discussion revolve around key performance indicators such as methane conversion, hydrogen recovery, and hydrogen yield.

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Chemical equilibrium analysis of hydrogen production from shale gas using sorption enhanced chemical looping steam reforming

Cited by 50 publications

References 55 publications

Steam reforming of shale gas with nickel and calcium looping

Steam reforming of shale gas with nickel and calcium looping

Hydrogen Production from Cyclic Chemical Looping Steam Methane Reforming over Yttrium Promoted Ni/SBA-16 Oxygen Carrier

Recent Advances in Bimetallic Catalysts for Methane Steam Reforming in Hydrogen Production: Current Trends, Challenges, and Future Prospects

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