Article
Energy & Fuels
Ewelina Ksepko, Rafal Lysowski
Summary: In this study, the applicability of five bimetallic Fe2O3-MnO2 oxygen carriers supported on TiO2 for direct hard coal combustion via chemical looping path was evaluated. The oxygen carriers were prepared by mechanical mixing and high-temperature calcination. The composition of the carriers and the process temperature were found to impact their reactivity with hard coal. The amount of manganese in the carriers positively correlated with their reactivity towards the fuel. It was concluded that the presented oxygen carriers exhibited good physicochemical stability after eight reaction cycles.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Chunqiang Lu, Rongrong Deng, Ruidong Xu, Yannan Zhao, Xing Zhu, Yonggang Wei, Kongzhai Li
Summary: The CeO2/MnCo2O4 oxygen carrier significantly improves the redox stability for methane combustion in Chemical Looping Combustion (CLC). Among different compositions, the 10% CeO2/MnCo2O4 sample shows the highest stability during successive CLC testing, with a methane combustion capacity of 2.22 mmol/g and average methane conversion rate of over 90%.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Muhammad Qasim, Muhammad Ayoub, Aqsha Aqsha, Muhammad Zulfiqar
Summary: Efficient oxygen carriers in chemical looping combustion have achieved significant progress in CO2 capture. Various types of oxygen carriers were prepared and characterized using different techniques. The Pr/Ce/gamma-Al2O3-based oxygen carriers showed higher thermal stability and excellent oxygen capacity.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Energy & Fuels
Arturo Cabello, Alberto Abad, Pilar Gayan, Francisco Garcia-Labiano, Luis F. de Diego, Juan Adanez
Summary: The study evaluated the activation process of a CaMn0.775Mg0.1Ti0.125O2.9-delta perovskite material in chemical looping combustion, showing that pre-activation and lowering the phi ratio can improve reactivity and combustion efficiency.
Article
Energy & Fuels
Milena de Santana Santos, Roger Frety, Luciana Lisi, Stefano Cimino, Soraia Teixeira Brandao
Summary: Perovskite oxides LaNi1-xCoxO3 (x = 0.0; 0.2; 0.5; 1.0) were studied in chemical looping combustion of methane. Nickel substitution for cobalt decreased active oxygen, while cobalt insertion improved re-oxidation rates and reduced coke deposits. The best CLC sample in the series was found to be LaNi0.5Co0.5O3 due to its faster complete reduction and resistance to coke formation.
Article
Energy & Fuels
Shuoxin Zhang, Yuchuan Feng, Xin Guo
Summary: The study found that copper doping enhanced the activities of iron-based oxygen carriers, but excessive copper would reduce their reactivity due to melting and agglomeration. Hydrogen temperature-programmed reduction (H-2-TPR) analysis, fixed-bed experiments, and density functional theory (DFT) calculations confirmed that Cu promoted the deep reduction of Fe2O3. The oxygen carrier doped with 1 wt % CuO was the most suitable material for CLH, with the highest hydrogen yield sustained at a high and stable level in multiple redox cycles.
Article
Engineering, Environmental
Wei-Hsin Chen, Kuan-Hsiang Chen, Aristotle T. Ubando, Wen-Jhy Lee, Man -Hin Chio
Summary: Chemical looping combustion (CLC) using iron-based oxygen carriers can efficiently capture carbon dioxide and produce high yields of CO2 and H2O under specific operating conditions. Fe3O4 and Fe2O3 are the major components of iron in OCs during most reduction and oxidation reactions. Decreasing oxygen input leads to increased carbon formation in the system.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Dingshan Cao, Cong Luo, Fan Wu, Liqi Zhang, Xiaoshan Li
Summary: Chemical looping steam methane reforming (CL-SMR) is a novel process using solid oxygen carriers to produce syngas and hydrogen from methane. This study screened perovskites and found LaFeO3-CeO2 as an optimal oxygen carrier with high hydrogen production, stable reaction performance, and high purity hydrogen. CeO2 loading provides lattice oxygen for syngas production and enhances hydrogen production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Xiaohua Chen, Jia Lin, Yong Zheng, Yingying Zhan, Wen Zhang, Yihong Xiao, Ying Zheng, Lilong Jiang
Summary: The addition of MOx as a second promoter positively influences the performance of Pd/γ-Al2O3 catalyst, enhancing its reducing capability and providing richer palladium step sites. Additionally, the MOx dopant increases surface oxygen species, inhibits the accumulation of OH/H2O, and improves both activity and moisture-tolerance of the catalyst.
Article
Energy & Fuels
Weixiang Zhang, Lina Zhang, Sijia Pei, Jiarui Wang, Dawei Liu, Xiaoxun Ma, Maohong Fan, Long Xu
Summary: One of the most significant topics in chemical looping reforming technology is the design and preparation of appropriate oxygen carriers with high reactivity and excellent stability. This study focuses on the chemical looping reforming of methane using cobalt-doped Ce-based oxygen carriers synthesized via the solution combustion method with the assistance of coconut shell. The introduction of cobalt decreases the crystallite size, increases oxygen vacancy concentration and lattice oxygen mobility, and the addition of coconut shell further enhances these positive changes and the interaction between Ce and Co.
Article
Chemistry, Applied
Xingyun Li, Zhishan Li, Chunqiang Lu, Danyang Li, Zhiqiang Li, Jian Gao, Jiali Wei, Kongzhai Li
Summary: This study proposes a modified NiO/LaFeO3 oxygen carrier to enhance the activity of lattice oxygen in methane partial oxidation. The results demonstrate that the loading of Ni has a significant impact on methane conversion rate and product selectivity, and 5 wt% Ni/ LaFeO3 oxygen carrier exhibits higher methane conversion rate and CO selectivity.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Zichen Di, Duygu Yilmaz, Arijit Biswas, Fangqin Cheng, Henrik Leion
Summary: Industrial materials containing spinel ferrite structure can be potential substitutes for synthetic oxygen carriers in chemical looping combustion, showing similar reactivity and stability but lower oxygen transport capacity.
Article
Energy & Fuels
Sonu Kumar, Pinak Mohapatra, Rushikesh K. Joshi, Matthew Warburton, Liang-Shih Fan
Summary: We propose a new low-temperature chemical looping combustion scheme for natural gas conversion into CO2 and NOx purification. The process utilizes NiO/ZrO2 as the oxygen carrier and operates at temperatures close to the flue gas temperature of 400-500 degrees C. Thermodynamic studies show that the presence of CO2 does not significantly affect NOx purification performance. Comparative analyses indicate improvements in exergy efficiency and effective thermal efficiency compared to conventional NOx selective catalytic reduction (SCR) processes.
Article
Engineering, Environmental
Sunkyu Kim, Leelavathi Annamalai, Raul F. Lobo
Summary: The combination of methane dehydroaromatization (MDA) and chemical looping (CL) combustion of hydrogen can overcome the thermodynamic constraints limiting conversion. The development of selective hydrogen-oxidation oxygen carriers in the CL is crucial for improving MDA performance. A novel oxygen carrier, silica-encapsulated Fe2O3, demonstrated high overall methane conversion and aromatics yield in a recirculating system. The silica layer prevented aromatics diffusion and promoted hydrogen transport and oxidation, while close physical contact between iron oxide particles and silica facilitated hydrogen conversion without full depletion of iron oxides.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xiaofeng Jiang, Hao Zheng, Yazhou Wu, Zhuo Cheng, Liang Zeng, Liang-Shih Fan
Summary: A novel chemical looping preferential oxidation (CL-PROX) process has been proposed and demonstrated for efficient elimination of trace level CO from H-2-rich streams. The process shows excellent CO removal performance and high H-2 recovery using a ceria-supported gamma-Fe2O3 oxygen carrier.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Ivan Gogolev, Amir H. Soleimanisalim, Carl Linderholm, Anders Lyngfelt
Summary: The study successfully demonstrated the conversion of high and low volatile biomass into electricity with high carbon capture efficiency using a newly designed chemical looping combustion pilot. The strong alkali absorption characteristics of ilmenite bed material were identified as the key determinant of gas-phase release of biomass alkali in the conducted experiments.
Article
Chemistry, Applied
Daofeng Mei, Amir H. Soleimanisalim, Carl Linderholm, Anders Lyngfelt, Tobias Mattisson
Summary: Testing a new manganese ore as oxygen carrier in Chemical Looping Combustion (CLC) with different biomass fuels showed high reactivity and low oxygen demand. Controlling temperature, solids circulation, and fuel power can improve carbon capture efficiency in the experiment.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Applied
Viktor Andersson, Amir H. Soleimanisalim, Xiangrui Kong, Fredrik Hildor, Henrik Leion, Tobias Mattisson, Jan B. C. Pettersson
Summary: The study investigates the interactions of alkali metal-containing compounds with reactor walls at high temperatures, showing complex effects on adsorption and re-evaporation, with the potential formation of new stable potassium-rich phases under reducing conditions. Transient changes in alkali concentration during redox cycles are observed, indicating the extensive and dynamic nature of these wall effects.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Daofeng Mei, Amir H. Soleimanisalim, Anders Lyngfelt, Henrik Leion, Carl Linderholm, Tobias Mattisson
Summary: Manganese ore EB exhibits higher reactivity with syngas but lower reaction rate with CH4 compared to other manganese ores. Improving the contact between volatiles and bed material is crucial for enhancing combustion performance in the CLC process.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Ali Hedayati, Amir H. Soleimanisalim, Tobias Mattisson, Anders Lyngfelt
Summary: The performance of two oxygen carriers in CLC and CLG conditions were tested, showing higher syngas yield and methane conversion, better mechanical properties and less dust formation.
Article
Chemistry, Applied
Viktor Andersson, Amir H. Soleimanisalim, Xiangrui Kong, Henrik Leion, Tobias Mattisson, Jan B. C. Pettersson
Summary: The study investigates the interactions between alkali and an oxygen carrier in Chemical-Looping Combustion (CLC) to better understand the fate of alkali in the process. Results show that alkali uptake is limited under oxidizing conditions but significant during stable reducing conditions.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Victor Purnomo, Daofeng Mei, Amir H. Soleimanisalim, Tobias Mattisson, Henrik Leion
Summary: Chemical looping gasification is an emerging process for producing valuable chemical feedstocks. This study found that the variation of the oxygen carrier mass conversion degree indirectly affects the conversion of biomass char, and validated the models used for evaluating the char conversion. The use of ilmenite in this process is unlikely to suffer from major agglomeration or fluidization issues.
Article
Energy & Fuels
Fredrik Hildor, Amir H. Soleimanisalim, Martin Seemann, Tobias Mattisson, Henrik Leion
Summary: This study investigates the effect of using steel converter slag as an oxygen-carrying bed material on tar species generated in a dual fluidized bed biomass gasifier. The findings suggest that steel converter slag possesses catalytic properties, resulting in a decreased ratio of heavy tar components compared to ilmenite and sand. Temperature and fuel load have a significant effect on tar generation compared to the circulation and steam ratio.
Article
Energy & Fuels
Victor Purnomo, Ivana Stanicic, Daofeng Mei, Amir H. Soleimanisalim, Tobias Mattisson, Magnus Ryden, Henrik Leion
Summary: Iron sand, a by-product of the industry, has a reasonable iron content and low cost. It has been found that iron sand can be used as an oxygen carrier in chemical looping gasification (CLG), with an oxygen transfer capacity lower than ilmenite. Utilizing iron sand leads to higher conversion rates of pine forest residue char to CO and H2 compared to ilmenite. The study also presents novel findings on the crystalline phase transformation of iron sand at different oxidation levels.
Article
Chemistry, Applied
Muhammad Nauman Saeed, Mohammad Shahrivar, Gajanan Dattarao Surywanshi, Tharun Roshan Kumar, Tobias Mattisson, Amir H. Soleimanisalim
Summary: The second-generation bio aviation fuel production via Chemical Looping Gasification (CLG) combined with downstream Fischer-Tropsch (FT) synthesis is a possible way to decarbonize aviation sector. This study models the full chain process of biomass to liquid fuel (BtL) with LD-slag and Ilmenite as oxygen carriers using Aspen Plus software, validates the results with experiments, and conducts a techno-economic analysis of the process.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Mohammad Shahrivar, Muhammad Nauman Saeed, Gajanan Dattarao Surywanshi, Tobias Mattisson, Amir H. Soleimanisalim
Summary: The second-generation bio aviation fuel production via Chemical Looping Gasification (CLG) of biomass combined with downstream Fischer-Tropsch synthesis is a possible way to decarbonize the aviation sector. To increase carbon utilization and biofuel yield, incorporation of two types of electrolyzers, Polymer Electrolyte Membrane (PEM) and Molten Carbonate Electrolysis Cell (MCEC), for syngas conditioning has been investigated. Techno-economic analysis indicates that syngas conditioning using PEM and MCEC electrolyzers would result in an increase of the annual profit by a factor of 1.4 and 1.7, respectively, when compared to using only WGS reactors.
Article
Green & Sustainable Science & Technology
Daofeng Mei, Ivan Gogolev, Amir H. Soleimanisalim, Anders Lyngfelt, Tobias Mattisson
Summary: The steel slag from the Linz-Donawitz process, known as LD-slag, was investigated as an oxygen carrier in a chemical-looping combustor with biomass fuels. Heat treatment at high temperatures was required to improve operability. The results showed that with LD-slag as the oxygen carrier, a lower oxygen demand could be achieved with high solids circulation.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2023)
Article
Engineering, Environmental
Ali Hedayati, Amir H. Soleimanisalim, Carl Johan Linderholm, Tobias Mattisson, Anders Lyngfelt
Summary: Two manganese ores were investigated as oxygen carriers for chemical looping conversion of simulated biomass volatiles with different iron content. The ore with higher iron content showed significant oxygen release at 900 degrees C and full conversion of various gases at low fuel flow rates, while the ore with lower iron content obtained a slightly higher syngas fraction and H-2 to CO ratio in the product stream. The formation of fines, particle size distribution, and bulk density of the oxygen carriers were measured to evaluate their mechanical properties during the chemical looping process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Amir H. Soleimanisalim, Mohamad Hashem Sedghkerdar, Davood Karami, Nader Mahinpey
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
