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
Green & Sustainable Science & Technology
Birgitta Narindri Rara Winayu, Chun-Ta Li, Hsin Chu
Summary: Calcined ilmenite was used as an oxygen carrier in chemical looping combustion (CLC) and achieved high conversion rates. Increasing syngas concentration, operating temperature, and superficial velocity improved the reaction rate and oxygen carrier utilization, but the application of CO and CH4 caused carbon deposition and surface blocking. High redox cycles had a negative effect on the performance of the oxygen carrier.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Guicai Liu, Haiming Wang, Severin Deplazes, Andrei Veksha, Christian Wirz-Toendury, Apostolos Giannis, Teik Thye Lim, Grzegorz Lisak
Summary: The study investigated the simultaneous high-temperature HCl removal and syngas combustion over barium-decorated oxygen carriers. Coating iron ore with Ba and Al compounds enhanced combustion efficiency and enabled sorbent regeneration through treatment with a mixture of CO2 and H2O. The findings demonstrate the potential of using Ba-Al-decorated iron ore as a bifunctional material in CLC processes.
COMBUSTION AND FLAME
(2021)
Article
Engineering, Environmental
Chat How Joewin Koh Yang, Guicai Liu, Wei Ping Chan, Ya Zhao, Mei Ping Vernette Chin, Wen Liu, Teik Thye Lim, Grzegorz Lisak
Summary: The utilization of ferric sludge as an oxygen carrier (OC) for chemical looping combustion (CLC) of municipal solid waste (MSW) syngas was explored. The performance of ferric sludge in CLC and simultaneous HCl removal was evaluated and compared with iron ore as a benchmarked OC. The results showed that ferric sludge performed better than iron ore in terms of syngas combustion efficiency and HCl removal. Temperature comparison revealed that ferric sludge performed better at lower CLC temperature. Agglomeration was observed when ferric sludge was used in extended CLC cycles, but it was reduced when inert alpha-Al2O3 support was used.
CHEMICAL ENGINEERING JOURNAL
(2023)
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
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
Energy & Fuels
Ambrose Ugwu, Mogahid Osman, Abdelghafour Zaabout, Shahriar Amini
Summary: Gas switching dry reforming (GSDR) efficiently converts CO2 and CH4 into syngas for GTL syntheses through redox cycles with alternating supply of reducing and oxidizing gases. Experimental demonstrations show achievable H-2/CO molar ratios suitable for methanol production.
Article
Engineering, Environmental
Lei Liu, Zhenshan Li, Zuoan Li, Yngve Larring, Ningsheng Cai
Summary: This study investigates the effect of SO2 on the redox kinetics of a CaMn0.375Ti0.5Fe0.125O3-delta perovskite oxygen carrier, revealing that SO2 has minimal impact on reduction reactivity at high temperatures but decreases oxidation reactivity. The sulfur mainly exists in the form of sulfates/sulfides on the particle surface, leading to sulfur poisoning effect during oxidation and reduction processes.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Multidisciplinary
Nhut Minh Nguyen, Falah Alobaid, Paul Dieringer, Bernd Epple
Summary: Biomass gasification is a promising renewable energy source that can replace fossil fuels, but faces challenges such as tar formation and low efficiency. Chemical looping gasification is considered a suitable pathway for producing valuable products from biomass. The review paper provides insights into the recent developments of biomass-based chemical looping gasification process.
APPLIED SCIENCES-BASEL
(2021)
Article
Biotechnology & Applied Microbiology
Zhen Fan, Neng Huang, Kunlei Liu
Summary: Chemical looping combustion (CLC) is a fuel combustion technology that has less energy penalty for CO2 removal. This study systematically analyzes the feasibility of autothermal operation in CLC and discusses the selection of oxygen carrier, capacity and impact of support materials, circulation rate, heat-up feeds, aeration gas, reaction kinetics, and CLC operation, aiming to provide insights and approaches for the development of oxygen carriers.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Guicai Liu, Chia Chyi Chang, Ya Zhao, Andrei Veksha, Apostolos Giannis, Teik Thye Lim, Grzegorz Lisak
Summary: The influence of alkali earth metals (AEMs) doping on CuO/Al2O3 oxygen carrier in chemical looping combustion (CLC) was investigated. The doping of AEMs enhanced the performance and stability of the oxygen carrier, and deferred the agglomeration. The improved performance was attributed to the enhanced redox kinetics and the migration of AEM species during the synthesis process.
JOURNAL OF CLEANER PRODUCTION
(2022)
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
Pietro Bartocci, Alberto Abad, Arturo Cabello Flores, Margarita de las Obras Loscertales
Summary: To address the scale-up challenges of Chemical Looping Processes, the development of efficient and affordable oxygen carriers is crucial. Ilmenite, an ore-derived oxygen carrier, has been identified as an abundant and low-cost option. This paper provides insights into its preparation, reactivity, and performance compared to other carriers, along with its thermodynamic properties and kinetics. The paper also explores its compatibility with various fuels (solid, liquid, gaseous, including biofuels) and discusses important considerations such as cost, environmental sustainability, oxygen transport capacity, as well as issues related to fluidized bed reactors, such as agglomeration and attrition behavior. Furthermore, the paper investigates the interaction between ilmenite and fuels, including the impact of impurities and coke deposition on the gasification rate of solid fuels.
Article
Green & Sustainable Science & Technology
Haiming Wang, Guicai Liu, Andrei Veksha, Xiaomin Dou, Apostolos Giannis, Teik Thye Lim, Grzegorz Lisak
Summary: The redox performances of iron ore modified with different alkaline earth metals as oxygen carriers for chemical looping combustion of municipal solid waste derived syngas were evaluated. It was found that BaO-modified iron ore demonstrated the best reactivity, and AEM oxides showed superior performance compared to AEM aluminates due to their strong interaction with Fe2O3.
JOURNAL OF CLEANER PRODUCTION
(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.