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New Frontiers in Chemical Looping Technology for Fuel Conversion
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New Frontiers in Chemical Looping Technology for Fuel Conversion

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I1: Fuel".

Deadline for manuscript submissions: closed (24 May 2022) | Viewed by 5011

Special Issue Editor

Dr. Arturo Cabello

E-Mail Website1 Website2
Guest Editor
CSIC - Instituto de Carboquimica, Combustion and Gasification Group, C. Miguel Luesma Castán, 4, 50018 Zaragoza, Spain
Interests: development of oxygen carriers for chemical looping processes; chemical looping technologies (CLC and CLR) at pressurized conditions; development of techno-economic analyses focused on chemical looping technologies; production of syngas and hydrogen through chemical looping processes using biofuels; new applications of chemical looping: high-temperature thermochemical energy storage, deoxygenation, epoxidation, oxidative dehydrogenation, oxidative coupling of CH4, selective oxidation, fluid catalytic cracking (FCC), etc.

Special Issue Information

Dear Colleagues,

Chemical looping is one of the most promising technologies for efficient fuel conversion with inherent CO2 capture. Most of the research carried out to date in chemical looping has focused on fossil fuel combustion processes for the production of electricity and heat. However, chemical looping technologies exhibit high flexibility and versatility that allow them to use a wide range of fuels, both fossil and renewable, and to be applied to a large number of energy and chemical processes.

One of the main challenges in chemical looping technologies is their application to industrial-scale processes. In this regard, a great effort still needs to be made addressing technical gaps in chemical looping to be on track to validate the processes for the next scale of large pilot demonstrations.

For this Special Issue of Energies (IF: 3.004) entitled “New Frontiers in Chemical Looping Technology for Fuel Conversion”, we would like to encourage original contributions regarding the scale-up of chemical looping processes and new applications of chemical looping. Potential topics include, but are not limited to: the development of oxygen carriers; the design and operational experiences of chemical looping reactors and plants; the development of chemical looping processes under pressurized conditions; chemical looping processes for hydrogen and syngas production; the chemical looping conversion of biofuels; chemical looping modelling and process simulation; techno-economic analysis of chemical looping technologies; chemical looping for high-temperature thermochemical energy storage; chemical looping deoxygenation; chemical looping epoxidation; methane-to-methanol via chemical looping; chemical looping partial oxidation; application of chemical looping in mitigating ventilation air methane (VAM) emissions; chemical looping oxidative dehydrogenation; chemical looping for the oxidative coupling of methane; chemical looping selective oxidation; and the application of chemical looping combustion to fluid catalytic cracking processes (CLC-FCC).

Dr. Arturo Cabello
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • development of oxygen carriers
  • chemical looping combustion
  • chemical looping reforming
  • H2 production
  • syngas production
  • chemical looping at pressurized conditions
  • CO2 capture
  • biofuels
  • negative CO2 emissions
  • chemical looping modelling and process simulation
  • techno-economic analyses
  • chemical looping new applications

Published Papers (3 papers)

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Research

20 pages, 3074 KiB  
Article
Dimensioning Air Reactor and Fuel Reactor of a Pressurized Chemical Looping Combustor to Be Coupled to a Gas Turbine: Part 1, the Air Reactor
by Pietro Bartocci, Alberto Abad, Aldo Bischi, Lu Wang, Arturo Cabello, Margarita de Las Obras Loscertales, Mauro Zampilli, Haiping Yang and Francesco Fantozzi
Energies 2023, 16(5), 2102; https://0-doi-org.brum.beds.ac.uk/10.3390/en16052102 - 21 Feb 2023
Cited by 1 | Viewed by 1264
Abstract
This paper provides a simple methodology for the design of the air reactor of a chemical looping combustor to optimize its characteristics when it is employed connected to a turbo expander to produce power. The design process, given a certain objective (e.g., electric [...] Read more.
This paper provides a simple methodology for the design of the air reactor of a chemical looping combustor to optimize its characteristics when it is employed connected to a turbo expander to produce power. The design process, given a certain objective (e.g., electric power) defines the reactor specifics, namely height and diameter, taking into account the following aspects: solids inventory of the air reactor; gas velocity; air reactor transport disengaging height (TDH); solids concentration profile along the reactor height, dense bed height; freeboard height; pressure drop depending on air reactor injectors design and configuration. The total air reactor height was about 9.5 m, while the diameter was about 1.8 m. The total inventory was about 10,880 kg; while the circulation rate in the air reactor was about 110 kg/s. The operating pressure and temperature were, respectively, 12 bar and 1200 °C. The average velocity of the gases inside the reactor was about 4 m/s. The fluidization regime resulted to be comprised between turbulent and fast fluidization. Further work must be directed into the estimate of the pressure drop of the reactor, which will affect the plant efficiency in a considerable way. Full article
(This article belongs to the Special Issue New Frontiers in Chemical Looping Technology for Fuel Conversion)
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17 pages, 1406 KiB  
Article
Pressurized Chemical Looping for Direct Reduced Iron Production: Carbon Neutral Process Configuration and Performance
by Nicole Bond, Robert Symonds and Robin Hughes
Energies 2022, 15(14), 5219; https://0-doi-org.brum.beds.ac.uk/10.3390/en15145219 - 19 Jul 2022
Cited by 4 | Viewed by 2166
Abstract
To achieve net-zero iron and steel production by 2050, many iron and steel producers are turning to direct reduced iron (DRI)—electric arc furnace (EAF) steel production as an opportunity to achieve significant CO2 emissions reductions relative to current levels. However, additional innovations [...] Read more.
To achieve net-zero iron and steel production by 2050, many iron and steel producers are turning to direct reduced iron (DRI)—electric arc furnace (EAF) steel production as an opportunity to achieve significant CO2 emissions reductions relative to current levels. However, additional innovations are required to close the gap between DRI and net-zero steel. Pressurized chemical looping-DRI (PCL-DRI) is a novel technology explored to meet this target, in which the reformer firebox and fired process gas heaters are replaced with PCL combustion units. Captured CO2 is conditioned and compressed for pipeline transportation and storage/utilization. The performance of two different PCL-DRI configurations relative to traditional DRI processes was explored via process simulation: a Midrex-type process and an Energiron-type process. The PCL-DRI processes were shown to have equivalent or lesser total fuel consumption (8% reduction) compared to the base cases, and greater process water production (170–260% increase), with minimal or no loss in thermal efficiency. PCL-DRI is a strong competitor to alternative methods of reaching net-zero DRI due to lower energy penalties for carbon capture, no required changes to stream chemistry in or out of the EAF, and no requirement for hydrogen infrastructure. Full article
(This article belongs to the Special Issue New Frontiers in Chemical Looping Technology for Fuel Conversion)
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18 pages, 6745 KiB  
Article
Selecting and Testing of Cement-Bonded Magnetite and Chalcopyrite as Oxygen Carrier for Chemical-Looping Combustion
by Mengjun Li, Teng Zheng, Daofeng Mei, Baowen Wang and Jingjing Ma
Energies 2022, 15(14), 5093; https://0-doi-org.brum.beds.ac.uk/10.3390/en15145093 - 12 Jul 2022
Cited by 3 | Viewed by 1167
Abstract
Combining iron and copper ores can generate an oxygen carrier that has a synergic effect of high temperature resistance and high reactivity. In this work, typical cements available in the market were studied as binders to bind magnetite and chalcopyrite to develop a [...] Read more.
Combining iron and copper ores can generate an oxygen carrier that has a synergic effect of high temperature resistance and high reactivity. In this work, typical cements available in the market were studied as binders to bind magnetite and chalcopyrite to develop a suitable oxygen carrier for chemical-looping combustion (CLC). A first selection step suggested that an aluminate cement, namely CA70, could favor the generation of oxygen carrier particles having good crushing strength, good particle yield, and high reactivity. The CA70-bonded oxygen carrier was then subjected to cyclic tests with CH4, CO, and H2 in reduction and in air oxidation at temperatures of 850, 900, and 950 °C with gas concentrations of 5, 10, 15, and 20% in a batch-fluidized bed reactor. The increase in temperature promoted the fuel conversion. At 950 °C, the conversions of CH4 and CO reached up to 80.4% and 99.2%, respectively. During more than 30 cycles, the oxygen carrier kept a similar reactivity to the fresh carrier and maintained its composition and physical properties. The oxygen transport capacity was maintained at 21–23%, and the phases were CuO, Fe2O3, Al2O3, and minor CaS. In the used sample, some grains were observed, but the morphology was not greatly changed. Agglomeration was absent during all the cycles, except for the deep reduction with H2. Full article
(This article belongs to the Special Issue New Frontiers in Chemical Looping Technology for Fuel Conversion)
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