Steam reforming of shale gas with nickel and calcium looping

Abstract

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.

Thermodynamic Analysis of Hydrogen Production From Conventional Steam Reforming of Groundnut Shell

“…The result depicts a good agreement with the results obtained from CEA. Similar thermodynamic studies were also conducted using several feedstocks including shale gas [4,10], hydroxyacetone [18], palm empty fruit bunch and pine pyrolysis oils [19], and urea [20]. There results showed same trend to those of this study with regards to H 2 yield and purity.…”

“…Le Chatelier"s principle governs the behaviour of H 2 yield and purity whereby an increase in the water reactant concentration in the system shift the equilibrium towards higher water conversion, thus causing higher H 2 yield and purity (Figure 1). The disadvantage of operating at high S:C ratio is that higher reactor volume will be needed, furthermore, there will be high cost for raising steam [4,10]. Additionally, operating at higher S:C ratio is one of the reasons behind catalyst deactivation owing to pore blockage [4,10,[21][22][23].…”

“…The disadvantage of operating at high S:C ratio is that higher reactor volume will be needed, furthermore, there will be high cost for raising steam [4,10]. Additionally, operating at higher S:C ratio is one of the reasons behind catalyst deactivation owing to pore blockage [4,10,[21][22][23]. Similar study on the potential of hydrogen production using agricultural biomass (rice, sugarcane, cotton, wheat, and maize) has been perform by Irfan et al, 2022 [24].…”

“…Hydrogen is of enormous value in the production of synthetic fertilizers through _____________________________________ A Publication of Department of Pure and Industrial Chemistry, UMYU Page | 55 ammonia manufacture and an important reagent in refinery operations [1]. 50 % of all the global hydrogen production is consumed by ammonia production [1][2][3][4].…”

Techno-Economic Analysis of Hydrogen and Electricity Production by Biomass Calcium Looping Gasification

“…Kathe et al investigated the thermodynamic limitations and energy consumption of the natural gas CLR hydrogen generation process using an iron-based oxygen carrier (OC) [18]. Adiya et al investigated using NiO on Al 2 O 3 and NiO on CaO/Al 2 O 3 as catalysts and OC in a packed bed reactor for shale gas chemical looping steam reforming for hydrogen production, which showed a high fuel conversion and yield under operating temperatures of 700 and 750 • C [19,20]. Techno-economics analysis of three hydrogen production processes was investigated by Chisalita and Cormos [21], which concluded that efficient hydrogen production via chemical looping is the most efficient with low maintenance and operating costs.…”