Core-shell structured CaO-Ca9Al6O18@Ca5Al6O14/Ni bifunctional material for sorption-enhanced steam methane reforming

Chen, Xiangling; Yang, Lei; Zhou, Zhi; Cheng, Zhenmin

doi:10.1016/j.ces.2017.01.036

Cited by 48 publications

(20 citation statements)

References 48 publications

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“…Steam reforming of hydrocarbons was a kind of feasible approaches for hydrogen production, because the more hydrogen via it can be produced, not just from the reforming materials, but also from steam. Currently, the steam reforming of CH 4 , bio-oil, tar, and so on for hydrogen production has been investigated widely [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Therefore, steam reforming of RCOG should be an attractive technique for hydrogen or H 2 -rich syngas production and tar component removal, with surplus steam supply or substantial energy waste to produce steam in the iron and steel enterprises, although RCOG itself contains only 10-15 vol % steam with the very low S/C ratio (the mole ratio of steam and carbon in RCOG) [2].…”

Section: Introductionmentioning

confidence: 99%

Selection and preparation of CO₂ sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

Xie

Han

et al. 2018

Env Prog and Sustain Energy

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The study on CO2 sorbent to be used in the sorption‐enhanced steam reforming process of raw coke oven gas (RCOG) was performed via thermodynamic and experimental analysis in this article. From the thermodynamic analysis, CaO showed the highest CO2 adsorption capacity in the SR reaction temperature zone of RCOG and the best CO2 desorption efficiency at the higher temperature among eight candidate metal‐oxides, and thus was selected as the active component of CO2 sorbent. Then, the CaO‐based sorbents were prepared with Ca12Al14O33 as carrier and their adsorption performances were tested via thermogravimetric experiment. Under the preparation conditions with the calcined time of 4 h, the calcined temperature of 900°C and the CaO content of 75%, the sorbent sample showed the better CO2 adsorption and cycle stability than the other prepared samples and pure CaO, with its adsorption capacity reaching 47.38%. From the sorption‐enhanced steam reforming experiments, the addition of the selected sorbent can obviously improve the H2 yield, with its concentration approaching 100%, and the optimal reforming temperature was deceased, with the H2 yield obtaining 83.76% at 800°C. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 89–97, 2019

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Section: Introductionmentioning

confidence: 99%

Selection and preparation of CO₂ sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

Xie

Han

et al. 2018

Env Prog and Sustain Energy

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“…This finding supported earlier results of Molinder et al [515] in showing incomplete carbonation for CaO under dry atmospheres in the same time frame (see and it is hoped that these techniques will be applied more frequently to further materials in the future. which phases were present at the surface of the synthesized particles [519]. XPS was used to track the cause of higher CO2 absorption of CeO2-modified CaO/Ca12Al14O33 composites for SESMR [520].…”

Section: X-ray Diffraction and Other Synchrotron-based X-ray Techniquesmentioning

confidence: 99%

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Dunstan¹,

Donat²,

Bork³

et al. 2021

Preprint

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Carbon dioxide capture and mitigation forms a key part of the technological response to combat climate change and reduce CO2 emissions. Solid materials capable of reversibly absorbing CO2 have been the focus of intense research for the past two decades, promising stability and low energy costs to implement and operate compared to the more widely used liquid amines. In this Review, we explore the fundamental aspects underpinning solid CO2 sorbents based on alkali and alkaline earth metal oxides operating at mid- to high temperature: how their structure, chemical composition and morphology impact their performance and long-term use. Various optimization strategies are outlined to improve upon the most promising materials, and we combine recent advances across disparate scientific disciplines including materials discovery, synthesis, and in situ characterization to present a coherent understanding of the mechanisms of CO2 absorption both at surfaces and within solid materials.

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“…The appearance of Ca(OH) 2 phase was resulted from the hydration of CaO while exposed to moisture in the air. [54][55][56] In the following SESRG step, CaO was carbonated to CaCO And then the following OC regeneration/sorbent decarbonation step under oxidative atmosphere merges CaO and cobalt oxides into each other's lattice to form CCO via a solid-state reaction. 43 Since Pt does not involve in the formation of CCO, it would be stripped off from metallic Co, resulting in the agglomeration on CCO surfaces and being oxidized to PtO 2 .…”

Section: Recyclability Of the Coupled Clmc-sesrg Processmentioning

confidence: 99%

Pt–calcium cobaltate enables sorption‐enhanced steam reforming of glycerol coupled with chemical‐looping CH₄ combustion

Dang

et al. 2021

AIChE Journal

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Sorption-enhanced steam reforming (SESR) process is usually highly energy intensive in producing high-purity hydrogen. Herein, the sorbent decarbonation was conducted in the presence of O 2 to enable the exothermic reaction between CaO and CoO x to form calcium cobaltate (CCO). By utilizing CCO as oxygen carrier (OC), the chemicallooping methane combustion was employed prior to the SESR of glycerol (SESRG), by which CCO was prereduced to Co catalysts and CaO sorbent, thereby significantly improving the H 2 yield from SESRG. With a Pt-doped CCO acting as precatalyst, CO 2 sorbent, and OC, we realized 70% CH 4 conversion and 96 vol% H 2 with 120% yield (based on glycerol) for 20 cycles, and the excess H 2 was due to steam gasification of coke. The promoting effects of Pt toward CH 4 conversion and H 2 production were rationalized by CH 4 temperature-programmed reduction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. Our results demonstrate the feasibility of process integration enabled by multifunctional materials.

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Core-shell structured CaO-Ca9Al6O18@Ca5Al6O14/Ni bifunctional material for sorption-enhanced steam methane reforming

Cited by 48 publications

References 48 publications

Selection and preparation of CO₂ sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

Selection and preparation of CO₂ sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Pt–calcium cobaltate enables sorption‐enhanced steam reforming of glycerol coupled with chemical‐looping CH₄ combustion

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Core-shell structured CaO-Ca9Al6O18@Ca5Al6O14/Ni bifunctional material for sorption-enhanced steam methane reforming

Cited by 48 publications

References 48 publications

Selection and preparation of CO2 sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

Selection and preparation of CO2 sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

CO2 capture using solid sorbents: Fundamental aspects, mechanistic insights and recent advances

Pt–calcium cobaltate enables sorption‐enhanced steam reforming of glycerol coupled with chemical‐looping CH4 combustion

Contact Info

Product

Resources

About

Selection and preparation of CO₂ sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

Selection and preparation of CO₂ sorbent for sorption‐enhanced steam reforming process of raw coke oven gas

Pt–calcium cobaltate enables sorption‐enhanced steam reforming of glycerol coupled with chemical‐looping CH₄ combustion