The coupling of CH4 partial oxidation and CO2 splitting for syngas production via double perovskite-type oxides LaFexCo1−xO3

Shen, Xiaowen; Wu, Yujian; Wang, Jiamin; Jiang, Enchen; Xu, Xinhua; Su, Jingfeng; Jia, Zhiwen

doi:10.1016/j.fuel.2020.117381

Cited by 31 publications

(16 citation statements)

References 46 publications

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“…The existence of redox cycle reportedly enhanced the activation of oxidants, hence promoting the oxygen coverage on catalyst surface and metal-support interaction, thereby reducing the amount of carbon deposit [58,59]. In an effort of improving the OSC of redox material, Shen et al [60] prepared a double perovskite-type oxides LaFe x Co 1-x O 3 catalysts and examined their catalytic behavior under oxidant-enriched atmosphere (similar to TRM environment). By utilizing the redox cycling feature of the perovskite (Fig.…”

Section: Carbon and Coke Depositionmentioning

confidence: 99%

Review on the catalytic tri-reforming of methane - Part I: Impact of operating conditions, catalyst deactivation and regeneration

Minh

Pham

Siang

et al. 2021

Applied Catalysis A: General

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Section: Carbon and Coke Depositionmentioning

confidence: 99%

Review on the catalytic tri-reforming of methane - Part I: Impact of operating conditions, catalyst deactivation and regeneration

Minh

Pham

Siang

et al. 2021

Applied Catalysis A: General

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“… 50 Perovskite-based metal oxides have demonstrated good performance for the production of syngas from CH 4 . 51 − 54 Perovskites have the general formula of ABO 3 , where A represents a rare earth metal and/or an alkaline earth metal, and B is a transition metal. 55 , 56 Perovskites generally possess good redox properties under the appropriate temperature and pressure conditions, 55 , 56 offer more resistance to carbon deposition, and are thermodynamically suitable to convert CH 4 to syngas.…”

Section: Introductionmentioning

confidence: 99%

“…Like any other chemical looping-based process, the feasibility of GSPOX depends to a great extent on the oxygen carriers, which should be of low cost, and enable a high selectivity toward syngas production in the fuel stage and hydrogen production in the oxidation stage with steam . Perovskite-based metal oxides have demonstrated good performance for the production of syngas from CH 4 . − Perovskites have the general formula of ABO 3 , where A represents a rare earth metal and/or an alkaline earth metal, and B is a transition metal. , Perovskites generally possess good redox properties under the appropriate temperature and pressure conditions, , offer more resistance to carbon deposition, and are thermodynamically suitable to convert CH 4 to syngas. ,− Perovskites have also been applied in the combined partial oxidation and H 2 O/CO 2 splitting to produce syngas in the reduction step and H 2 /CO in the oxidation step. − …”

Section: Introductionmentioning

confidence: 99%

Combined Syngas and Hydrogen Production using Gas Switching Technology

Ugwu

Zaabout

Donat

et al. 2021

Ind. Eng. Chem. Res.

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This paper focuses on the experimental demonstration of a three-stage GST (gas switching technology) process (fuel, steam/CO 2 , and air stages) for syngas production from methane in the fuel stage and H 2 /CO production in the steam/CO 2 stage using a lanthanum-based oxygen carrier (La 0.85 Sr 0.15 Fe 0.95 Al 0.05 O 3 ). Experiments were performed at temperatures between 750–950 °C and pressures up to 5 bar. The results show that the oxygen carrier exhibits high selectivity to oxidizing methane to syngas at the fuel stage with improved process performance with increasing temperature although carbon deposition could not be avoided. Co-feeding CO 2 with CH 4 at the fuel stage reduced carbon deposition significantly, thus reducing the syngas H 2 /CO molar ratio from 3.75 to 1 (at CO 2 /CH 4 ratio of 1 at 950 °C and 1 bar). The reduced carbon deposition has maximized the purity of the H 2 produced in the consecutive steam stage thus increasing the process attractiveness for the combined production of syngas and pure hydrogen. Interestingly, the cofeeding of CO 2 with CH 4 at the fuel stage showed a stable syngas production over 12 hours continuously and maintained the H 2 /CO ratio at almost unity, suggesting that the oxygen carrier was exposed to simultaneous partial oxidation of CH 4 with the lattice oxygen which was restored instantly by the incoming CO 2 . Furthermore, the addition of steam to the fuel stage could tune up the H 2 /CO ratio beyond 3 without carbon deposition at H 2 O/CH 4 ratio of 1 at 950 °C and 1 bar; making the syngas from gas switching partial oxidation suitable for different downstream processes, for example, gas-to-liquid processes. The process was also demonstrated at higher pressures with over 70% fuel conversion achieved at 5 bar and 950 °C.

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“…The gasification, reforming, and partial oxidation are often applied for syngas production in the fuel reactor, and a low or mild lattice oxygen transfer rate is beneficial to avoid excessive oxidization of syngas. The related researches mainly focused on the screening of materials including perovskite − or ferrite …”

Section: Introductionmentioning

confidence: 99%

Natural Iron Ore as Oxygen Carrier Modified with Rare Earth Metal for Chemical Looping Hydrogen Production

Cui

Wang

et al. 2021

Energy Fuels

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Chemical looping hydrogen production (CLHG) represents a novel technology for H2 production. Natural iron ore is a potential oxygen carrier for CLHG but is facing a challenge of low deep reduction reactivity. This paper aims at promoting the reduction reactivity of iron ore and H2 production using Ce-doped and La-doped iron ore with an impregnation method. The oxygen carriers were characterized by SEM-EDX, XRD, and XPS. The reactivity and stability of the doped iron ore were evaluated in TGA. The CLHG process was carried out in a fixed bed system, and the effect of rare earth metal on oxygen carrier conversion and H2 production was evaluated. The results indicate that both Ce-doped and La-doped iron ore as oxygen carriers exhibited a higher reduction reactivity than the raw iron ore and a relatively stable redox performance at 900 °C after the initial activation process. Reasonable Ce loading (5–10%), La loading (2.5–15%), and temperature (above 850 °C) could promote oxygen carrier conversion and enhance H2 production. The La-Fe interaction enabled the iron ore to be oxidized to LaFeO3 (Fe3+) during water splitting, promoting H2 production. Carbon deposition was not formed during the reduction process, and H2 purity remained at 100% during the whole water splitting process.

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The coupling of CH4 partial oxidation and CO2 splitting for syngas production via double perovskite-type oxides LaFexCo1−xO3

Cited by 31 publications

References 46 publications

Review on the catalytic tri-reforming of methane - Part I: Impact of operating conditions, catalyst deactivation and regeneration

Review on the catalytic tri-reforming of methane - Part I: Impact of operating conditions, catalyst deactivation and regeneration

Combined Syngas and Hydrogen Production using Gas Switching Technology

Natural Iron Ore as Oxygen Carrier Modified with Rare Earth Metal for Chemical Looping Hydrogen Production

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