Small Scale Hydrogen Production from Metal-Metal Oxide Redox Cycles

Yamaguchi, Doki; Tang, Liangguang; Burke, Nick; Chiang, Kin Seng; Rye, Lucas; Hadley, Trevor D.; Lim, Seng

doi:10.5772/50030

Cited by 6 publications

(3 citation statements)

References 52 publications

(82 reference statements)

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“…After condensation of water, pure CO 2 , free of nitrogen, can be compressed for sequestration or enhanced oil recovery (EOR). − Moreover, CLC minimizes NOx formation since both the AR and the FR operate at temperatures <1200 °C so that there is only possible NOx formation from fuel nitrogen . The CLC concept can also be used for H 2 production. − The fuel could be gaseous fuels (such as syngas, NG, and propane), liquid fuels (e.g., diesel, bitumen, and heavy oils) or solid fuels (e.g., coal, biomass, and coke).…”

Section: Introductionmentioning

confidence: 99%

CO₂ Capture with Chemical Looping Combustion of Gaseous Fuels: An Overview

et al. 2017

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The world-wide consumption of natural gas (NG) and other fossil fuels (e.g., coal and crude oil) is ever increasing. However, most CO 2 resulting from either NG combustion or other processes is released into the atmosphere without capture. Chemical looping combustion (CLC) is a two-step combustion technology for power and heat generation with inherent CO 2 capture, using either gaseous fuels or solid and liquid fuels. A previous review focused on CLC of solid fuels or CLC of all types of fuels but did not give an in-depth and specific discussion of gaseous fuel CLC systems. China is one of the largest consumers of NG, coal, and crude oil in the world, and it is essential to develop an alternative technology to take the place of gaseous fuel (e.g., NG) combustion. This Review summarizes recent research and development work on CLC using gaseous fuels, including a technological and economic assessment, types of oxygen carriers (OCs), reactor types, coke formation and OCs poisoning, efficiency and exergy analyses, and model development based on a literature survey. The plant efficiency of NG-CLC can be up to 52−60% (LHV), including CO 2 compression, based on calculations and simulations, which is about 3−5% more efficient than a NG combined cycle with CO 2 capture. Ni-based materials have been widely developed and applied for NG-CLC because of its fast kinetics for methane conversion. CuO−Cu 2 O/Cu, Mn 3 O 4 −MnO, and Fe 2 O 3 −Fe 3 O 4 are typical OCs with high selectivity toward CO 2 and H 2 O. The operating conditions are closely dependent on reactor configurations, hydrodynamics, mass and heat balances, and characteristics of the OCs in the system. CLC and other CO 2 capture technologies are also compared in the present Review, which has rarely been investigated previously. From simulation and process analysis, a conceptual design of a NG-CLC power plant of thermal input 655 MW th is conducted to clarify its technological advantages and economic benefits compared to other power generation processes. The air reactor, fuel reactor, and OCs do not impose significant economic barriers for scale-up and commercialization of CLC.

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Section: Introductionmentioning

confidence: 99%

CO₂ Capture with Chemical Looping Combustion of Gaseous Fuels: An Overview

et al. 2017

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“…Although copper (Cu-)-based oxygen carriers mostly demonstrate higher costs than Fe-based oxygen carriers and lower melting point (1084-1326 °C) than other oxygen carriers, the properties such as high oxygen carrier capacity, high durability, and low environmental impact of Cu-based oxygen carriers increase the interest for them in chemical looping technologies (Adánez et al 2006;Yamaguchi et al 2012). Based on the thermodynamic analysis, Cu-based oxygen carriers strongly support the feasibility of the chemical looping combustion process for solid fuels such as coal, biomass, and solid wastes .…”

Section: Oxygen Carriersmentioning

confidence: 99%

Decarbonising bioenergy through biomass utilisation in chemical looping combustion and gasification: a review

Güleç,

Okolie

2023

Environ Chem Lett

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Biomass valorisation for bioenergy is crucial for establishing a sustainable low-carbon circular bioeconomy and addressing societal and environmental challenges. As global demand for renewable energy grows, effective waste management using biomass becomes increasingly vital. However, successful implementation requires addressing specific local, scientific, and conceptual challenges, including technological intricacies, resource availability, scalability, and environmental impacts. Advancements in chemical looping gasification and chemical looping combustion are reviewed here as essential components of bioenergy with carbon capture and storage technologies. Chemical looping technologies have substantially contributed to decarbonising various industries, supported by precise trends. The review highlights the potential of chemical looping combustion and gasification in biomass utilisation for generating bioenergy and mitigating carbon emissions. Moreover, the advantages of chemical looping processes enhance their feasibility and applicability across different contexts including (1) significant increase in biomass conversion efficiency through chemical looping gasification, leading to substantial reductions in greenhouse gas emissions, (2) progress in chemical looping combustion, enhancing carbon capture and storage capabilities and contributing to a closed carbon cycle, (3) detailed insights into integrating chemical looping technologies into industrial sectors.

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“…Currently, the catalytic reforming of methane using natural gas or light hydrocarbons has been the most widely industrial scale process used for the production of H 2 or synthesis gas [4]. Although the catalytic reforming process is well established, the process efficiency decreases considerably when the scale is decreased [5]. In this aspect, the viability of hydrogen production by chemical looping reforming (CLR) has been demonstrated through several papers described in the literature [5e8].…”

Section: Introductionmentioning

confidence: 99%