Article
Energy & Fuels
Jingchun Yan, Tianxu Shen, Peng Wang, Xianglei Yin, Xiao Zhu, Shouxi Jiang, Laihong Shen
Summary: An innovative fluidized bed thermogravimetric analyzer was designed to study the performance of oxygen carriers in chemical looping combustion processes, revealing that high-grade manganese ore with less silicon content is more suitable for industrial CLC pilots.
Article
Engineering, Environmental
K. Y. Kwong, R. Mao, S. A. Scott, J. S. Dennis, E. J. Marek
Summary: This research developed an analytical model to evaluate the impact of CLOU materials on the combustion rate, showing that the presence of CLOU material significantly increased the combustion rate of char particles.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Dennis Y. Lu, Yewen Tan, Marc A. Duchesne, David McCalden
Summary: Biomass, a complex fuel containing organic and inorganic matter, can cause ash-related problems in combustion systems. This study focuses on estimating the potential for potassium absorption by bed materials in high-potassium biomass fuel combustion. Experiments were conducted to examine the effects of various factors on potassium capture. The results show that temperature and potassium salt type have a significant impact on potassium capture, while the gas atmosphere has a less notable effect.
Article
Green & Sustainable Science & Technology
Hetian Chi, Miguel A. Pans, Chenggong Sun, Hao Liu
Summary: In this study, the use of molochite and dolomite as bed additives in a fluidised bed combustor was investigated to counter agglomeration during the combustion of wheat straw and miscanthus pellets. The results showed that dolomite was superior to molochite in prolonging defluidisation time when firing wheat straw. Lime addition to fuel had the most significant improvement on combustion performance for both fuels. The oxy-fuel combustion atmosphere had a great impact on the effectiveness of dolomite but little influence on the effectiveness of molochite.
Article
Chemistry, Applied
Qi Hong, Peng Wang, Ziying Chen, Zhen Huang, Laihong Shen, Tao Song
Summary: Red mud shows low reactivity with methane and better reactivity with biomass char. It exhibits stable reactivity during oxygen carrier cycles, but tends to agglomerate during methane fluidized bed experiments.
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
Anders Lyngfelt, David Pallares, Carl Linderholm, Fredrik Lind, Henrik Thunman, Bo Leckner
Summary: Chemical looping combustion (CLC) has the potential to avoid the high costs and energy penalties of existing CO2 capture technologies. It transfers oxygen to the fuel using an oxygen carrier, separating air and fuel. This results in separate streams of CO2 and H2O, with relatively pure CO obtained after condensation of H2O. The circulation of oxygen and heat to the fuel reactor is crucial in CLC, which is typically a dual fluidized bed process. While many oxygen carriers have been successfully used in pilot operation, little consideration has been given to achieving sufficient circulation in an industrial-scale system.
Article
Thermodynamics
Eduardo Garcia, Hao Liu
Summary: The study found that using ilmenite as the bed material can reduce CO emissions, decrease efficiency loss, but increase NOx emissions. Ilmenite can also reduce the size of agglomerates and decrease the tendency towards defluidisation.
Article
Chemistry, Physical
Cao Kuang, Shuzhong Wang, Song Lv, Jianjun Cai, Ming Luo, Jun Zhao
Summary: Cu-based oxygen carriers modified by iron ore and chrysotile showed enhanced performance in in-situ gasification and chemical-looping with oxygen uncoupling processes, improving energy conversion efficiency, stability, and high-temperature tolerance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Li Yang, Wenbin Chen, Chen Song, Caifu Li, Jinlong Chen, Xi Zhang, Fang Liu
Summary: Chemical looping combustion (CLC) is a technique that utilizes oxygen carriers (OCs) to transfer oxygen and heat between fuel reactor and air reactor. The attrition of OCs is a major impediment to the large-scale application of CLC technology. In this study, the effects of different biomass ashes on the reactivity and attrition resistance of red mud OCs were investigated. The results showed that the rape straw ash promoted the reactivity of OCs, while the bagasse ash improved the attrition resistance. The corn straw ash was found to be an effective material for strengthening the skeleton structure of OCs, enhancing both reactivity and attrition resistance.
Article
Energy & Fuels
Ivan Gogolev, Toni Pikkarainen, Juho Kauppinen, Carl Linderholm, Britt-Marie Steenari, Anders Lyngfelt
Summary: Chemical looping combustion (CLC) of biomass is a promising technology for power generation with integrated carbon capture, but the alkali content of biomass may lead to bed agglomeration and oxygen carrier absorption issues. Studies have shown that gas-phase alkali emissions in CLC operation can be up to 15 times higher than in OCAC operation, mainly due to steam accelerating the decomposition of alkali compounds in the biomass.
Article
Chemistry, Applied
Buryan Petr, Tomas Hlincik
Summary: Adding Sorbacal SP to calcined limestone enhances desulphurisation capacity, while adding Sorbacal H 90 is detrimental to the technology of brown-coal fluidised-bed boilers.
ADSORPTION SCIENCE & TECHNOLOGY
(2021)
Article
Energy & Fuels
Jianzheng Xu, Tao Song
Summary: This study conducted experiments and modeling on the CO2-gasification of rice husk char using a bed of red mud oxygen-carrier. The effects of oxygen carrier, temperature, and CO2 concentration were evaluated and modeled. The results showed that the red mud significantly enhanced the gasification of char. A model coupling the kinetics of char gasification and mass transfers within and surrounding the char was established and showed a good agreement with experimental results. The study also revealed the presence of mass transfer resistance within the char particle, which led to pore structure changes at a carbon conversion of about 0.3.
Article
Energy & Fuels
Ranjani Siriwardane, Jarrett Riley, William Benincosa, Samuel Bayham, Michael Bobek, Douglas Straub, Justin Weber
Summary: The Copper-Ferri-Manganese-Aluminate spinel oxygen carrier developed at NETL has shown promising results for chemical looping combustion with methane, with high attrition resistance and oxygen transfer capacity. The carrier prepared at a commercial manufacturing facility displayed similar performance to lab scale preparations, demonstrating satisfactory methane conversion and high particle durability during testing.
Article
Energy & Fuels
Daofeng Mei, Anders Lyngfelt, Henrik Leion, Tobias Mattisson
Summary: Chemical looping combustion (CLC) is a technology that can generate heat and power while capturing CO2. Using biomass in CLC (bio-CLC) allows for negative CO2 emissions. This study investigates the interaction between alkalis in biomass and the process, focusing on charcoal impregnated with alkali chlorides. The results show that impregnation with alkalis improves the gasification rate, with carbonates resulting in earlier and more permanent defluidization compared to chlorides. Partial agglomeration and retention of alkalis in the oxygen carrier are observed, with similar reactivity noticed with CH4 and H2.
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
Inaki Adanez-Rubio, Tobias Mattisson, Marijke Jacobs, Juan Adanez
Summary: Chemical Looping with Oxygen Uncoupling (CLOU) is a technology that separates the oxygen for fuel combustion using an oxygen carrier in a fuel reactor. This study investigates the behavior of Mn/Mg/Si system as oxygen carriers for CLOU. The most reactive oxygen carriers without Si in the structure were found to be M24Mg76 and M48Mg51. These carriers showed good reactivity and mechanical stability in a batch fluidized bed reactor.
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
Fredrik Hildor, Tobias Mattisson, Carl Linderholm, Henrik Leion
Summary: This study investigates the effect of adding small amounts of more reactive elements into steel converter slag, which improves its reactivity towards CO and CH4, and increases the conversion rate of benzene.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Agricultural Engineering
Francisco M. Baena-Moreno, Daofeng Mei, Henrik Leion, David Pallares
Summary: The calcium looping technology is a promising method for CO2 capture and storage. Previous studies have focused on evaluating this technology using combustion flue gas, while little is known about its performance when capturing CO2 from biogas or gases resulting from hydrothermal carbonization. This experimental study assesses the performance of calcium looping for biogas and finds improved CO2-capture performance compared to combustion flue gas.
BIOMASS & BIOENERGY
(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
Energy & Fuels
Daofeng Mei, Anders Lyngfelt, Henrik Leion, Tobias Mattisson
Summary: Chemical looping combustion (CLC) is a technology that can generate heat and power while capturing CO2. Using biomass in CLC (bio-CLC) allows for negative CO2 emissions. This study investigates the interaction between alkalis in biomass and the process, focusing on charcoal impregnated with alkali chlorides. The results show that impregnation with alkalis improves the gasification rate, with carbonates resulting in earlier and more permanent defluidization compared to chlorides. Partial agglomeration and retention of alkalis in the oxygen carrier are observed, with similar reactivity noticed with CH4 and H2.
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)
Review
Engineering, Environmental
Yuru Liu, Ke Yin, Jiawei Wu, Daofeng Mei, Jukka Konttinen, Tero Joronen, Zhifeng Hub, Chao He
Summary: This review systematically analyzes the impact of ash compositions on the oxygen carrier in the chemical looping process (CLP), providing insights into the agglomeration and melting process caused by ash deposition. Strategies are proposed to mitigate the adverse effects of ash and recycle useful metals.
CHEMICAL ENGINEERING JOURNAL
(2023)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)