Effects of Support and Oxygen Vacancies on the Energetics of NiO reduction with H2 for the Chemical Looping Combustion (CLC) Reaction; A DFT Study

2021 ◽  
Author(s):  
Negar Manafi Rasi ◽  
Alexander S. Hyla ◽  
Sathish Ponnurangam ◽  
Nader Mahinpey
Keyword(s):  
Metal Oxides ◽  
Energy Conversion ◽  
Carbon Footprint ◽  
Fossil Fuels ◽  
Oxygen Vacancies ◽  
Dft Study ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Conversion Technology

Chemical looping combustion (CLC) technology is an innovative energy conversion technology that employs oxygen carriers (OC), typically metal oxides, to burn fossil fuels with a minimal carbon footprint. The performance...

scholarly journals Comparison of oxygen carriers for chemical-looping combustion

2006 ◽  
Vol 10 (3) ◽  
pp. 93-107 ◽  
Author(s):  
Marcus Johansson ◽  
Tobias Mattisson ◽  
Anders Lyngfelt
Keyword(s):  
Fossil Fuels ◽  
Oxygen Carrier ◽  
High Reactivity ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Reducing Conditions ◽  
Different Temperatures ◽  
Combustion Technology ◽  
Separation Of Co2

Chemical-looping combustion is a combustion technology with inherent separation of the greenhouse gas CO2. This technique involves combustion of fossil fuels by means of an oxygen carrier which transfers oxygen from the air to the fuel. In this manner a decrease in efficiency is avoided for the energy demanding separation of CO2 from the rest of the flue gases. Results from fifty oxygen carriers based on iron-, manganese- and nickel oxides on different inert materials are compared. The particles were prepared using freeze granulation, sintered at different temperatures and sieved to a size 125-180 mm. To simulate the environment the particles would be exposed to in a chemical-looping combustor, reactivity tests under alternating oxidizing and reducing conditions were performed in a laboratory fluidized bed-reactor of quartz. Reduction was performed in 50% CH4/50% H2O while the oxidation was carried out in 5% O2 in nitrogen. In general nickel particles are the most reactive, followed by manganese. Iron particles are harder but have a lower reactivity. An increase in sintering temperatures normally leads to an increase in strength and decrease in reactivity. Several particles investigated display a combination of high reactivity and strength as well as good fluidization behavior, and are feasible for use as oxygen carriers in chemical-looping combustion.

Evaluation of Novel Ceria-Supported Metal Oxides As Oxygen Carriers for Chemical-Looping Combustion

2012 ◽  
Vol 51 (39) ◽  
pp. 12796-12806 ◽  
Author(s):  
Ali Hedayati ◽  
Abdul-Majeed Azad ◽  
Magnus Rydén ◽  
Henrik Leion ◽  
Tobias Mattisson
Keyword(s):  
Metal Oxides ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Supported Metal Oxides ◽  
Supported Metal

scholarly journals Promising Impregnated Mn-based Oxygen Carriers for Chemical Looping Combustion of Gaseous Fuels

2017 ◽  
Vol 114 ◽  
pp. 334-343 ◽  
Author(s):  
T.R. Costa ◽  
P. Gayán ◽  
A. Abad ◽  
F. García-Labiano ◽  
L.F. de Diego ◽  
...  
Keyword(s):  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Gaseous Fuels

Effect of Manganese Oxide over Cu–Mn-Based Oxygen Carriers for Chemical Looping Combustion

2018 ◽  
Vol 18 (9) ◽  
pp. 6475-6483 ◽  
Author(s):  
Yong Han Jeong ◽  
Tae Jin Lee ◽  
Misook Kang ◽  
Jeom-In Baek ◽  
Ho-Jung Ryu ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers

Nickel- and Copper-Based Oxygen Carriers for Chemical Looping Combustion

2009 ◽  
Vol 32 (3) ◽  
pp. 443-449 ◽  
Author(s):  
A. Hoteit ◽  
M. K. Chandel ◽  
A. Delebarre
Keyword(s):  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers

Enhanced performance of chemical looping combustion of methane by combining oxygen carriers via optimizing the stacking sequences

2018 ◽  
Vol 230 ◽  
pp. 696-711 ◽  
Author(s):  
Xianming Cheng ◽  
Kongzhai Li ◽  
Xing Zhu ◽  
Yonggang Wei ◽  
Zhouhang Li ◽  
...  
Keyword(s):  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers
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