High quality syngas production from pressurized K2CO3 catalytic coal gasification with in-situ CO2 capture

Zhou, Xing; Zhao, Jing‐Tai; Guo, Shuai; Li, Jiazhou; Yu, Zhongliang; Song, Shuangshuang; Li, Junguo; Fang, Yitian

doi:10.1016/j.ijhydene.2018.07.062

Cited by 21 publications

(3 citation statements)

References 35 publications

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“…reported that the FeCralloy woven fiber-based catalyst could convert natural gas into CO and H 2 at a temperature of 900°C and pressure of 0.1–2 MPa [ 15 ], while Zhou et al. demonstrated that the gasification of coal could produce CO, H 2 , methane (CH 4 ) and carbon dioxide (CO 2 ) at 700°C and 3.5 MPa [ 16 ]. Obviously, these strategies not only demand high energy consumption, but also result in a variety of complex by-products.…”

Section: Introductionmentioning

confidence: 99%

Plastics-to-syngas photocatalysed by Co–Ga2O3 nanosheets

Jiao

Zheng

et al. 2022

National Science Review

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Plastics take hundreds of years to degrade naturally, while their chemical degradation typically requires high temperature and pressure. Here, we first utilize the solar energy to realize the sustainable and efficient plastic-to-syngas conversion with the aid of water at ambient conditions. As an example, the commercial plastic bags could be efficiently photoconverted into renewable syngas by the Co-Ga2O3 nanosheets, with the hydrogen and carbon monoxide formation rates of 647.8 and 158.3 μmol g−1 h−1. In situ characterizations and labelling experiments unveil water is photoreduced into hydrogen, while non-recyclable plastics including polyethylene bags, polypropylene boxes and polyethylene terephthalate bottles are photodegraded to carbon dioxide, which is further selectively photoreduced into carbon monoxide. In-depth investigation illustrates the efficiency of syngas production mainly depends on the carbon dioxide reduction process, and hence the photocatalysts of high carbon dioxide reduction activity should be designed to promote the efficiency of plastic-to-syngas conversion in the future. The concept for the photoreforming of non-recyclable plastics into renewable syngas helps to eradicate ‘white pollution’ and alleviate the energy crisis simultaneously.

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Section: Introductionmentioning

confidence: 99%

Plastics-to-syngas photocatalysed by Co–Ga2O3 nanosheets

Jiao

Zheng

et al. 2022

National Science Review

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“…Hydrogen is regarded as one of the most promising energy sources due to its high energy density and cleanness [ 1 , 2 ]. Nevertheless, the H 2 molecule does not exist in nature, and most of the hydrogen exists in water [ 3 , 4 ]. Nowadays, natural gas steam reforming [ 5 ] is the most extensive hydrogen production method, which accounts for 48% of the world’s hydrogen production [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

New Process Combining Fe-Based Chemical Looping and Biomass Pyrolysis for Cogeneration of Hydrogen, Biochar, Bio-Oil and Electricity with In-Suit CO2 Separation

Zhou

Jin

et al. 2023

Molecules

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Fe-based chemical looping gasification is a clean biomass technology, which has the advantage of reducing CO2 emissions and the potential of self-sustaining operation without supplemental heating. A novel process combining Fe-based chemical looping and biomass pyrolysis was proposed and simulated using Aspen Plus. The biomass was first subjected to pyrolysis to coproduce biochar, bio-oil and pyrolysis gas; the pyrolysis gas was subjected to an Fe looping process to obtain high-purity hydrogen and carbon dioxide. The influences of the pyrolysis reactor operating temperature and fuel reactor operation temperature, and the steam reactor and air reactor on the process performance are researched. The results showed that, under the operating condition of the established process, 23.07 kg/h of bio-oil, 24.18 kg/h of biochar, 3.35 kg/h of hydrogen and a net electricity of 3 kW can be generated from 100 kg/h of rice straw, and the outlet CO2 concentration of the fuel reactor was as high as 80%. Moreover, the whole exergy efficiency and total exergy loss of the proposed process was 58.98% and 221 kW, respectively. Additionally, compared to biomass direct chemical looping hydrogen generation technology, the new process in this paper, using biomass pyrolysis gas as a reactant in the chemical looping hydrogen generation process, can enhance the efficiency of hydrogen generation.

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“…There are two main ways to increase H 2 yield further and reduce tar from the current SESG process. One method adds pressure to the process to raise the reaction temperature [32][33][34]. Under pressure, a higher gasification temperature can be achieved to increase the CO 2 absorption rate.…”

Section: Introductionmentioning

confidence: 99%

H 2 -rich syngas production by sorption enhanced steam gasification of palm empty fruit bunch

Aprianti¹,

Faizal²,

Said³

et al. 2022

Comptes Rendus. Chimie

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Hydrogen-rich syngas from palm empty fruit bunch has been produced using CaO and bentonite as absorbent and catalyst. The gasification process is carried out at 550-750 °C at atmospheric pressure in the fixed bed gasifier with steam to biomass ratio (S/B) of 0-2.5 and Ca/C ratio of 0-2. The results showed that CaO only acts as CO 2 absorbent during the process. Increasing the ratio of Ca/C and S/B has increased the concentration of H 2 and absorption of CO 2 in the syngas. The addition of CaO did not significantly increase the production of CH 4 and CO in the syngas. The H 2 concentration reaches about 78.16 vol% at 700 °C and Ca/C 2.

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High quality syngas production from pressurized K2CO3 catalytic coal gasification with in-situ CO2 capture

Cited by 21 publications

References 35 publications

Plastics-to-syngas photocatalysed by Co–Ga2O3 nanosheets

Plastics-to-syngas photocatalysed by Co–Ga2O3 nanosheets

New Process Combining Fe-Based Chemical Looping and Biomass Pyrolysis for Cogeneration of Hydrogen, Biochar, Bio-Oil and Electricity with In-Suit CO2 Separation

H 2 -rich syngas production by sorption enhanced steam gasification of palm empty fruit bunch

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