Chemical Looping Systems for Fossil Energy Conversions

Fan, Liang‐Shih

doi:10.1002/9780470872888

Cited by 292 publications

(483 citation statements)

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“…Gupta et al (2007) analyzed the equilibrium phase diagrams of numerous Ni-, Cd-, Cu-Co-, Mn-, Snand Fe-based metal oxides as reacted with CO and H 2 that would be fully oxidized by these metal oxides. Cao and Pan (2006) (Fan, 2010). Beside of these properties, the use of support materials for better performance on reactivity and mechanical strength are summarized in the last column of Table 1 for reference (Adanez et al, 2012).…”

Section: Oxygen Carriers For Chemical Looping Processmentioning

confidence: 99%

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Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Chiu

2012

Aerosol Air Qual. Res.

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Chemical looping is a novel energy technology that undertakes inherent CO 2 capture and has better energy efficiency than existing CO 2 capture technologies. Metal oxides (also known as oxygen carriers) are applied for the chemical looping process in place of air to offer oxygen for fuel combustion, thus enhancing CO 2 purity in the effluent stream. This article introduces the major aspects of chemical looping technology, including the oxygen carrier, reactor and fuel. Fe-, Ni-and Cu-based metal oxides were found to be suitable oxygen carriers for the chemical looping process based on the evaluation indexes of oxygen capacity, cost, reactivity, and mechanical strength. The modification of oxygen carriers by supporting materials is the typical research regime for enhancing mechanical strength and reactivity. The reactor systems currently used for the chemical looping process include fluidized and moving bed reactors. Fluidized bed reactors are well developed for gaseous fuel combustion applications, while moving bed reactors operated with a counter-flow mode between the solid fuel and oxygen carriers would enhance combustion efficiency, and reduce the operating solid inventory of oxygen carriers. Gaseous fuels, including natural gas and syngas gasified from coal, could achieve complete fuel conversion and high CO 2 yield for different combinations of oxygen carrier and reactor system. Gasification of solid fuels, including coal, petroleum coke and biomass in the fuel reactor, is a critical step that might reduce overall combustion efficiency. To improve solid fuel combustion and CO 2 yield, modification of the reactor design or operational conditions are necessary for the combustion of solid fuels by a chemical looping process.

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Section: Oxygen Carriers For Chemical Looping Processmentioning

confidence: 99%

“…Howard Lane designed a fixed bed reactor for steam-iron process to generate H 2 in 1904 (Fan, 2010). In the steam-iron process, iron was the chemical intermediate that oxidized by steam to generate H 2 , and was reduced by CO or H 2 to complete the chemical looping reaction scheme (Hurst, 1939;Hacker et al, 2000).…”

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confidence: 99%

Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Chiu

2012

Aerosol Air Qual. Res.

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“…Do zagadnień badanych eksperymentalnie w instalacjach pilotażowych należy spalanie węgla brunatnego w atmosferze mieszaniny tlen-ditlenek węgla [10,11]. W monografii [16] szeroko omówiono podstawy oraz rodzaje technologii spalania w pętli węgla. Systemy spalania w pętli chemicznej przebiegają w dwóch reaktorach: powietrznym oraz paliwowym.…”

Section: Węgiel Brunatnyunclassified

Nowe materiały i procesy w konwersji oraz przechowywaniu energii – wybrane zagadnienia

Zoń

Gnutek

2015

ZN PRz Mechanika

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“…After reduction and purge stages for 90 and 30 min, respectively, the reduced FT-04 oxygen carriers could be subsequently employed for chemical looping hydrogen generation (CLHG) through steam oxidation, as described by reactions from (7) to (9), as analyzed by the previous study (Fan, 2010). Thus, the temperature adopted in the steam oxidation phase had a limited impact on the total amounts of H 2 gas.…”

Section: Effect Of Reaction Temperature On Co 2 Yield and H 2 Generationmentioning

confidence: 99%

Fabrication of Fe2O3/TiO2 Oxygen Carriers for Chemical Looping Combustion and Hydrogen Generation

Liu

Tseng

et al. 2016

Aerosol Air Qual. Res.

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The characteristics and application of TiO 2 -supported Fe 2 O 3 oxygen carriers were investigated for chemical looping combustion (CLC) and hydrogen generation (CLHG) in this study. Prepared Fe 2 O 3 /TiO 2 oxygen carriers with 20-30 wt% of TiO 2 were demonstrated to achieve satisfactory results even after 30-cycle operation by thermogravimetric analyzer (TGA). Oxygen carriers contain more than 33 wt% TiO 2 were observed to be more porous and fragile after continuous high-temperature operation. Conversely, the reactivity of oxygen carriers contain less 10 wt% TiO 2 was rapidly decayed after operated for merely 3 redox cycles because of their dense structure. The CO 2 and H 2 conversions through syngas combustion and steam oxidation, respectively, for experiments were demonstrated to be feasible using sieved oxygen carriers at higher operation temperatures from 400 to 1000°C in fixed bed reactor (FBR) system.

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Chemical Looping Systems for Fossil Energy Conversions

Cited by 292 publications

References 0 publications

Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Chemical Looping Process - A Novel Technology for Inherent CO2 Capture

Nowe materiały i procesy w konwersji oraz przechowywaniu energii – wybrane zagadnienia

Fabrication of Fe2O3/TiO2 Oxygen Carriers for Chemical Looping Combustion and Hydrogen Generation

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