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
Chemistry, Applied
Doki Yamaguchi, Liangguang Tang, Jose Orellana, Trevor D. Hadley, Sankar Bhattacharya, Kok-Seng Lim
Summary: The study developed a compact fully looped chemical looping reactor and found that the CLC performance increased with increasing operation time over 36 hours, as indicated by the increase in the CO2/CO molar ratio. The morphology changes and ash interaction of the Australian ilmenite did not noticeably affect the CLC performance or operation during continuous operation.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Applied
Yunchang Dong, Yanan Wang, Jinchen Ma, Hengfeng Bu, Chuanbao Zheng, Haibo Zhao
Summary: In this study, composite oxygen carriers were prepared using extrusion-spheronization method with fine iron and copper ores as raw materials and inert aluminosilicates as binders. After optimization, the oxygen carriers showed good performance in terms of reactivity and stability, indicating the suitability of the method for large-scale preparation of oxygen carrier particles.
FUEL PROCESSING TECHNOLOGY
(2021)
Review
Energy & Fuels
Dunyu Liu, Chaoran Wang, Yunpei Fan, Qiuqi Liu, Xudong Wang, Kailong Xu, Jing Jin, Jingjing Ma, Jinchen Ma
Summary: Chemical looping combustion (CLC) of coal for carbon capture utilization and storage is an effective technology to reduce carbon emission. However, there is uncertainty in mercury emission from both air and fuel reactor. This paper aims to reveal the mechanisms for the transformation of mercury-related species.
Article
Thermodynamics
Haodong Huang, Jinchen Ma, Haibo Zhao, Chuguang Zheng
Summary: This work investigates the behavior of coal-derived chlorine in chemical looping combustion (CLC) and the potential adverse impacts of primary gaseous chlorine (HCl) on a Cu-based oxygen carrier (OC). The inactivation mechanism of the sol-gel-derived CuO/Al2O3 OC is studied. It is found that HCl is the main gaseous chlorine in coal CLC and shows high reactivity towards CuO. The presence of HCl can result in corrosion and degradation of the OC.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Energy & Fuels
Giovanny S. de Oliveira, Ciro E. S. Lobo, Carlos E. A. Padilha, Domingos F. S. Souza, Juan A. C. Ruiz
Summary: Brazil aims to reduce its CO2 emissions by utilizing glycerin in Chemical Looping Combustion (CLC). The study evaluates the feasibility of using glycerin in CLC and finds that the addition of ethanol improves combustion efficiency, while the addition of methanol reduces efficiency.
Article
Energy & Fuels
Huan Zhou, Guoqiang Wei, Qun Yi, Zheming Zhang, Yingjie Zhao, Yuke Zhang, Zhen Huang, Anqing Zheng, Kun Zhao, Zengli Zhao
Summary: Chemical looping gasification (CLG) of Yunnan lignite with Fe-Mn mixed oxygen carriers (OCs) was conducted to produce high-purity synthesis gas and reduce pollutant emissions. The Fe-Mn composite OCs exhibited oxygen decoupling characteristics and synergistic effects between active components, making them suitable for the gasification process.
Article
Engineering, Environmental
Ming Luo, Yanjun Qin, Jianjun Cai, Lili Qian, Shuxiang Wang, Haiyan Zhang, Lunzheng Zhou, Peng Liu
Summary: This study investigated the release and migration characteristics of sulfur in the chemical looping combustion of coal with two different synthetic oxygen carriers. The results showed that sulfur behavior varied under different conditions, with sulfur mainly migrating to metal sulfides at lower temperatures and peroxide coefficients.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Chemistry, Applied
M. T. Izquierdo, F. Garcia-Labiano, A. Abad, A. Cabello, P. Gayan, L. F. de Diego, J. Adanez
Summary: This study evaluated the stability of a CuO/Al2O3 impregnated oxygen carrier during methane chemical looping combustion at high oxygen carrier to fuel ratios. The research found that low oxygen carrier conversion variation reduced copper loss from particles, but reoxidizing the oxygen carrier at high temperatures was difficult due to the formation of CuAlO2. Operating at temperatures around 800 degrees C with low solid conversion variation is recommended to limit copper loss while maintaining physical stability.
FUEL PROCESSING TECHNOLOGY
(2021)
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
Ashwani Kumar Dubey, Arunkumar Samanta, Pinaki Sarkar, Vinod Kumar Saxena
Summary: The study examined the effectiveness of CuO as an oxygen carrier in the chemical looping with oxygen uncoupling (CLOU) process using three Indian coals. It was found that the combustion reaction was most suitable at a mass ratio of 1:30 and 850 degrees C, with good repeatability over multiple cycles and minor agglomeration. Additionally, the kinetic analysis indicates that the combustion reaction kinetics is likely diffusion-dominated, with apparent activation energies in the range of 38.3-60.1 kJ/mol and 102.6-129.0 kJ/mol for different temperature zones.
Article
Engineering, Environmental
A. Cabello, A. Abad, T. Mendiara, M. T. Izquierdo, L. F. de Diego
Summary: Chemical looping combustion (CLC) allows for the simultaneous combustion of a fuel and the capture of CO2. In this study, tests were conducted in a lab-scale CLC unit using a promising Cu-based oxygen carrier to determine its combustion performance and durability. Operating conditions were carefully selected to maximize the oxygen carrier's durability while achieving complete CH4 combustion. The results showed that the Cu-based oxygen carrier exhibited excellent mechanical resistance, making it suitable for continuous CLC operation at 900 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Siqi Liu, Fang He, Kun Zhao, Haibo Zhao, Zhen Huang, Guoqiang Wei, Wen Yang
Summary: Coal chemical looping gasification (CCLG) is a promising technology with high resource utilization rate and environmental protection properties, requiring suitable oxygen carriers and optimized operating conditions for coal conversion and H2&CO production. This study tested a Cu-Fe bi-ore oxygen carrier and found that the optimal gasification conditions were at 950 degrees C with a oxygen carrier-to-coal mass ratio of 3:1 and steam rate of 0.08 ml/min, achieving a syngas yield of 58 mmol/g, 75.2% syngas selectivity, and 85.3% carbon conversion.
Article
Energy & Fuels
Richard A. Newby, Dale L. Keairns, Robert W. Stevens
Summary: The objective of this study was to estimate the cost of commercial production of oxygen carriers (OCs) for large-scale application in the chemical looping combustion (CLC) power generation industry. Two production facility scenarios were considered, and two OC production techniques were addressed. The estimated OC product costs can be used to guide development and determine the maximum OC makeup rate for achieving a designated cost-of-electricity (COE) reduction goal.
Article
Engineering, Environmental
Zhenwu Miao, Laihong Shen, Haibo Zhao
Summary: A study found that a single natural ore oxygen carrier (OC) is limited in its industrial application due to its weak reactivity and cyclic stability. Chemical looping combustion (CLC) cycle tests were conducted on a composite hematite and copper ore OC prepared by spray drying granulation using a fluidized bed thermogravimetric analyzer (FB-TGA). The results revealed a high attrition rate of OC in the early stage of fluidization, which stabilized after 6 minutes at 0.28%/h. The redox cycle reaction subjected the OC to chemical and thermal stresses, leading to decreased mechanical strength, increased particle attrition and sintering. This hindered the oxidation stage and resulted in deep reduction of OC, causing particle agglomeration and loss of fluidization. Therefore, reducing the oxygen transfer capacity and residence time in the fuel reactor is beneficial for the safe operation of OC in industry.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Arturo Cabello, Alberto Abad, Maria T. Izquierdo, P. Gayan, Luis F. de Diego, Francisco Garcia-Labiano, Juan Adanez
Summary: Chemical looping combustion (CLC) is a cost-effective technology for CO2 capture, and the development of reliable oxygen carrier materials is essential for its scale-up. A low-cost method using thermogravimetric analysis has been developed to accelerate the identification of long-lasting materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Ivan Sampron, Luis F. de Diego, Francisco Garcia-Labiano, Maria T. Izquierdo
Summary: This study investigates the impact of different iron content oxygen carriers on the performance of the BCLG system. The research indicates that oxygen carriers with varying iron levels exhibit similar gasification parameters and tar production under changes in oxygen-to-fuel ratio and fuel reactor temperature.
Article
Engineering, Environmental
Inaki Adanez-Rubio, Francisco Garcia-Labiano, Alberto Abad, Luis F. de Diego, Juan Adanez
Summary: The use of bio-oil produced by biomass fast pyrolysis in Chemical Looping Reforming can efficiently generate hydrogen gas while reducing carbon deposition.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Ivan Sampron, Luis F. de Diego, Francisco Garcia-Labiano, Maria T. Izquierdo, Juan Adanez
Summary: A major challenge in biomass chemical looping gasification (BCLG) is converting CH4 to syngas for bioliquid fuel production. This study evaluates the catalytic effect of oxygen carriers on CH4 reforming reaction in BCLG process. Synthetic oxygen carriers, especially Cu-based carrier at high temperature, show better catalytic performance.
Article
Energy & Fuels
Inaki Adanez-Rubio, Ivan Sampron, Maria Teresa Izquierdo, Alberto Abad, Pilar Gayan, Juan Adanez
Summary: This study investigates the combustion and CO2 capture efficiency of coal and biomass using a magnetic Cu-based oxygen carrier. The results show that complete combustion of the fuel to CO2 and H2O can be achieved, with CO2 capture efficiency reaching up to 97% at the appropriate temperature.
Article
Energy & Fuels
M. de las Obras Loscertales, A. Abad, F. Garcia-Labiano, L. F. de Diego, P. Gayan, J. Adanez
Summary: Four different physico-chemical characteristics of Ca-based sorbents were evaluated as suitable precursors for CaSO4-based oxygen carriers in CLC systems.
Article
Energy & Fuels
Alberto Abad, Raul Perez-Vega, Maria Teresa Izquierdo, Pilar Gayan, Francisco Garcia-Labiano, Luis F. de Diego, Juan Adanez
Summary: Different chemical looping processes using metal oxide based material as oxygen carrier allow for the combustion or gasification of solid fuels and capture of CO2, improving efficiency. The challenge lies in separating the oxygen carrier from the ash, which requires the recovery of synthetic oxygen carriers. This study focuses on designing low reactive Mn-Fe based materials with magnetic properties as support material for highly reactive phases, exhibiting suitable mechanical and magnetic characteristics for solid separation.
Article
Energy & Fuels
Alberto Abad, Pilar Gayan, Francisco Garcia-Labiano, Luis F. de Diego, Maria T. Izquierdo, Teresa Mendiara, Juan Adanez
Summary: Chemical looping combustion (CLC) is an innovative technology that combines fuel combustion with CO2 capture using oxygen carriers. This study investigated the performance of CuO/Al2O3 and Fe2O3/Al2O3 particles as oxygen carriers in a CLC unit, and developed a mathematical model to simulate their behavior. The model successfully predicted the combustion performance of these materials in both a smaller-scale unit and a larger-scale unit.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Arturo Cabello, Teresa Mendiara, M. Teresa Izquierdo, Francisco Garcia-Labiano, Alberto Abad
Summary: This study investigated the use of a low-cost Fe-based residue as an oxygen carrier in the Chemical Looping Combustion (CLC) and Chemical Looping Reforming (CLR) processes with biogas. The results showed that the methane combustion efficiency in the CLC process was higher (around 86%) compared to other low-cost Fe-based materials. The dry reforming of biogas in the CLR process achieved about 55% methane conversion and a yield of 1.3 mol (CO + H2)/mol CH4 for syngas production.
Article
Engineering, Chemical
Inaki Adanez-Rubio, Amirhossein Filsouf, Merve Durmaz, Teresa Mendiara, Pilar Gayan, Juan Adanez
Summary: This study focuses on testing a Cu-based oxygen carrier with enhanced mechanical properties due to the addition of kaolin in the combustion of different biomass types in a continuous CLOU unit. Complete combustion of the biomass types was achieved and higher CO2 capture efficiencies were observed at 800-950 degrees C compared to without kaolin doping. The oxygen carrier retained its magnetic properties without any agglomeration problems after 80 hours of hot circulation operation.
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)
