Article
Energy & Fuels
Vanessa Hernandez-Tapia, Elizabeth Vera, Rosa-Maria Ramirez-Zamora, Brenda Alcantar-Vazquez
Summary: This study synthesized two slag-derived Li4SiO4 using metallurgical slags as silica sources and investigated their application as CO2 sorbents. The CO2 desorption process was studied under fixed temperature, with varying CO2 partial pressure and desorption temperature. The kinetic parameters of CO2 desorption were analyzed using the Avrami-Erofeev and zero-order models. The results showed that the activation energy calculated with the Avrami model was significantly higher than the reported sorption values and that Li4SiO4 derived from electric arc furnace slag exhibited less temperature dependence compared to that derived from blast furnace slag. Furthermore, the desorption kinetics were found to decrease with lower partial pressures of CO2, and the cyclic study revealed the formation of secondary phases in the slag-derived silicates.
Article
Chemistry, Multidisciplinary
Foster Amoateng Appiah, Dzifa Nugloze, Lois Sandra Sai-Obodai, Paweesuda Natewong, Raphael O. Idem
Summary: This study evaluated the influence of an activated carbon catalyst synthesized through hydrothermal treatment and furnace activation on CO2 absorption in a 4M BEA/AMP amine blend, comparing it with a KMgO/CNTs (1:4) catalyst. The results showed that activated carbon increased the linear rate of CO2 absorption by 33.3%, while for KMgO/CNTs, it was 25.5%. The higher surface area and stronger basic sites of activated carbon provided effective reaction sites for CO2 absorption, enhancing the absorption rate.
Article
Engineering, Environmental
Umair H. Bhatti, Haider Sultan, Gwan Hong Min, Sung Chan Nam, Il Hyun Baek
Summary: This study presents a new class of inexpensive and abundant montmorillonite clay-based catalysts, which can be tuned by ion-exchange to enhance surface area and surface acidity, effectively promoting CO2 desorption reactions at low temperatures. The prepared catalysts exhibit good separability and stability, making them promising for industrial applications in CO2 capture.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Cristian Villa-Perez, Pierre Arneodo Larochette, Delia B. Soria, Fabiana C. Gennari
Summary: Tri-lithium borate is a high-capacity CO2 sorbent that can be modified to improve its CO2 absorption kinetics and capacity by adding alkali fluorides. The modification process enhances the formation of a eutectic melt phase, resulting in fast kinetics and high CO2 capture capacity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jiaqi Ruan, Yichao Tong, Jingyu Ran, Changlei Qin
Summary: A large amount of discarded lithium batteries, especially LiFePO4, pose a great threat to the environment, while preparing Li4SiO4 sorbents from spent LiFePO4 batteries has potential for waste recycling and reducing CO2 capture costs. This study developed an effective preparation scheme by optimizing key variables and achieved Li4SiO4 sorbents with superior CO2 adsorption performance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Chemical
Qiang Sun, Jia Xiong, Hongxia Gao, Wilfred Olson, Zhiwu Liang
Summary: This study evaluates the catalytic effect of environmentally friendly imidazole series ionic liquids for CO2 desorption. The [Bmim]PF6 catalyst shows excellent catalytic activity, increasing CO2 release and reducing heat duty. The results suggest the potential application of this desorption technology for CO2 capture with lower energy consumption.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Chemistry, Applied
Shuzhen Chen, Changlei Qin, Weiyang Yuan, Dawid P. Hanak, Jingyu Ran
Summary: This study investigates the regeneration process of the high-temperature CO2 adsorbent Li4SiO4 and introduces the dependence of the regeneration rate on CO2 pressure for the first time. The findings show a correlation between the reaction order and the difference between equilibrium pressure and CO2 pressure, as well as provide apparent activation energy values for Li4SiO4 and KLi4SiO4 regeneration. The proposed power law model with m = 4/3 is suggested to be the most probable mechanism function for Li4SiO4-based sorbents regeneration.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Environmental Sciences
Lei Wang, Yi Yao, Trinh Tran, Patrick Lira, Richard Davis, Zhao Sun, Qinghua Lai, Sam Toan, Jianmin Luo, Yudai Huang, Yun Hang Hu, Maohong Fan, P. E. Steven Sternberg
Summary: The synthesis of mesoporous MgO nanoparticles with a new method improves CO2 sorption and desorption kinetics, overcoming the limitations of conventional CO2 capture technologies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Chemical
Zhan Tan, Shangshang Zhang, Xinwei Yue, Fangfan Zhao, Fengcao Xi, Dejian Yan, Hao Ling, Rui Zhang, Feiying Tang, Kuiyi You, He'an Luo, Xiaowen Zhang
Summary: This study utilized low-cost and environmentally friendly clay catalysts to accelerate CO2 desorption in amine-based CO2 capture technology, leading to improved efficiency. Among the catalysts, attapulgite demonstrated better catalytic activity and stability. This research contributes to the development of low-energy consuming CO2 capture technology.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Ali Hassan Bhatti, Mamoona Waris, Wajahat W. Kazmi, Umair H. Bhatti, Gwan Hong Min, Byung Cheol Park, Sungjoon Kweon, Il Hyun Baek, Sung Chan Nam
Summary: One of the main challenges of absorption-based CO2 capture is the high energy penalty during solvent regeneration. The addition of a solid acidic catalyst can optimize CO2 desorption at low temperatures and reduce the regeneration penalty. Metal-supported activated carbon catalysts were synthesized and evaluated, showing significant improvement in amine solvent regeneration. Using scalable and inexpensive materials can greatly reduce energy requirements for CO2 capture, advancing catalytic CO2 capture towards industrial implementation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Loren Acher, Tristan Laredo, Thierry Caillot, Akim Kaddouri, Frederic C. Meunier
Summary: This study investigated CO2 capture and methanation using solid adsorbents, microwave absorbers, and a methane catalyst. The research demonstrated the potential of using inexpensive microwave technology to convert trapped CO2 into valuable products.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Environmental
Shuzhen Chen, Jinze Dai, Changlei Qin, Weiyang Yuan, Vasilije Manovic
Summary: Research indicates that the equilibrium temperature for CO2 adsorption/desorption of Li4SiO4-based sorbents at high temperatures is higher than theoretical values, with silicon precursors and Ce/Fe dopants having minimal effects on equilibrium. Sorbents with K/Na exhibit significant drops in equilibrium temperature at 0.5 atm of CO2, and higher K doping results in lower turnover temperatures.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Construction & Building Technology
Marina Lopez-Arias, Carlos Moro, Vito Francioso, Husam H. Elgaali, Mirian Velay-Lizancos
Summary: This study investigates the effect of nano-TiO2 addition on the CO2 uptake rate of cement pastes and shows that it enhances the rate, enabling a more efficient capture of CO2.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Environmental
Zhijun He, Yaozu Wang, Yihe Miao, Heying Wang, Xuancan Zhu, Jia Li
Summary: This study adopts the concept of mixed polyamines to prepare efficient CO2 capture materials in mesoporous SBA-15. The synergy of TEPA and DEA enhances amine efficiency and reduces regeneration temperature, while the introduction of hydroxyl groups from DEA improves CO2 adsorption and desorption kinetics. The SBA-15 loaded mixed polyamine with a weight ratio of TEPA to DEA equaling to 4 exhibits promising CO2 adsorption performance and potential application.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Hitesh D. Rawate, Prakash D. Vaidya
Summary: The catalytic regeneration of N-ethylethanolamine (EEA) solvent using commercially available metal oxide catalysts was investigated in this study. The results showed that the Al2O3 catalyst performed well in lowering temperature and reducing energy consumption, while the CO2 desorption efficiency and energy consumption were improved when ZrO2 catalyst was impregnated with SO4(2-).
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Peng Zhou, Si-Xuan Guo, Linbo Li, Tadaharu Ueda, Yoshinori Nishiwaki, Liang Huang, Zehui Zhang, Jie Zhang
Summary: In this study, highly efficient carbon supported Ni-MoO2 heterostructured catalysts were reported for the electrochemical hydrogenation (ECH) of phenol in 0.10 M aqueous sulfuric acid (pH 0.7) at 60 degrees C. Catalysts with high and low densities of oxygen vacancy (O-v) sites achieved the highest yields of cyclohexanol and cyclohexanone, 95% and 86%, respectively, with faradaic efficiencies of approximately 50%. The enhanced phenol adsorption strength attributed to the O-v density was found to be responsible for the superior catalytic efficiency. This work provides a promising avenue for the rational design of advanced electrocatalysts for the upgrading of phenolic compounds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Runping Ye, Yuan-Yuan Huang, Chong-Chong Chen, Yuan-Gen Yao, Maohong Fan, Zhangfeng Zhou
Summary: This article reviews various approaches to synthesize ethylene glycol (EG) from CO2 and its derivatives under mild conditions, including thermocatalysis, photocatalysis, and electrocatalysis. The coal-to-ethylene glycol technology, a mature thermal catalytic method, still faces challenges in industrialization. The recent progress in the development of coal-to-ethylene glycol technology is discussed, with a focus on achieving EG synthesis under mild conditions through strategies such as doping promoters, support modification, and catalyst design. The emerging technological progress of photocatalytic and electrocatalytic EG synthesis under ambient conditions is also introduced, highlighting the need to address issues for large-scale production. Future development issues and prospects for ambient EG synthesis using different catalytic routes are proposed.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Lulu Ping, Yuan Zhang, Baojun Wang, Maohong Fan, Lixia Ling, Riguang Zhang
Summary: Based on the advantages of ethane oxidative dehydrogenation and the challenge of low ethylene selectivity, chemical looping oxidative dehydrogenation (CL-ODH) over the IrO2 catalyst was studied. The study revealed that both S-IrO2 and R-IrO2 states exist for the IrO2 catalyst in the dehydrogenation and regeneration processes, and the optimal reaction conditions were determined. This research expands the understanding of ethane CL-ODH over metal oxide catalysts and provides valuable information for process optimization and catalyst development.
Article
Nanoscience & Nanotechnology
Yuan Zhang, Baojun Wang, Maohong Fan, Lixia Ling, Riguang Zhang
Summary: In this study, a strategy to improve the catalytic performance of Pt-Sn alloy catalysts in ethane dehydrogenation (EDH) is proposed by engineering the shell surface structure and thickness. Density functional theory (DFT) calculations and kinetic Monte Carlo (kMC) simulations are used to understand the influences of catalyst surface structure, temperature, and reactant partial pressures. The results demonstrate that Pt@Pt3Sn catalysts generally have higher C2H4(g) activity and lower selectivity compared to Pt3Sn@Pt catalysts, due to their unique surface geometrical and electronic properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Lulu Chai, Jinlu Song, Yanzhi Sun, Xiaoguang Liu, Xifei Li, Maohong Fan, Junqing Pan, Xueliang Sun
Summary: This study proposes a smart dual-oxygen electrode for high-specific-energy batteries, which addresses the issues of energy efficiency decay, wide charge-discharge gap, and catalyst peeling. The electrode consists of a switch control module, OER and ORR catalysis layers, and an ion conductive | electronic insulating membrane. The electrode shows an ultralow energy efficiency decay rate and enables a high energy efficiency in zinc-air batteries.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Wantong Zhao, Xuebai Lan, Baojun Wang, Maohong Fan, Riguang Zhang
Summary: In this study, the inverse Mo6C4/Cu catalyst is modeled and predicted to promote C2 oxygenates formation in syngas transformation. The results show that the inverse Mo6C4/Cu catalyst greatly improves catalytic performance and facilitates C2 oxygenate production compared to previous catalysts. This is attributed to the synergistic effect between Mo6C4 cluster with Cu catalyst, which easily activates CO to produce CH2 monomer and facilitates CO insertion into CH2 to CH2CO.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
Kunpeng Li, Hui Hu, Maohong Fan, Mi Zhang, Zhongming Chen, Ruibin Lv, Hao Huang
Summary: An advanced oxidation process (AOPs) using Fe(II) activated peracetic acid (PAA) was investigated for the simultaneous removal of SO2 and NO from flue gas. The maximum removal efficiencies obtained were 92.3% for NO and 99.5% for SO2 under optimal conditions. Reactive oxidizing species and organic radicals were generated in the Fe(II)/PAA system, with organic radicals confirmed to be the major factors affecting NO oxidation. The main products of SO2 and NO removal were identified as SO42- and NO3-.
Review
Chemistry, Multidisciplinary
Tongtong Wang, Zhe Chen, Weibo Gong, Fei Xu, Xin Song, Xin He, Maohong Fan
Summary: Carbon nanofibers (CNFs) have diverse applications in sensor manufacturing, electrochemical catalysis, and energy storage. Electrospinning is a powerful commercial large-scale production technique for CNFs due to its simplicity and efficiency. This paper discusses the working theory of manufacturing electrospun CNFs, current efforts in upgrading CNF properties, and the corresponding applications. Future development of CNFs is also discussed.
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.
Editorial Material
Multidisciplinary Sciences
Jie Ding, Runping Ye, Yanghe Fu, Yiming He, Ye Wu, Yulong Zhang, Qin Zhong, Harold H. Kung, Maohong Fan
Summary: Urea, a crucial nitrogen fertilizer, plays a vital role in meeting global food demand. However, its current production method is energy-intensive and environmentally unfriendly. In this commentary article, the authors propose strategies to address and overcome these challenges.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhao Sun, Shufan Yu, Sam Toan, Rufat Abiev, Maohong Fan, Zhiqiang Sun
Summary: In this study, CuCr2O4-based catalytic oxygen carriers were designed for low-temperature methanol reforming. The activation of methanol at relatively low temperatures was achieved through the reinforcement of the Cu-O-Cr structure and the induction of highly reactive lattice oxygen. The hydrogen production rate was significantly increased by 53.2% with the application of CuCr2O4-based catalytic oxygen carriers. Furthermore, the Cu-O-Cr structure demonstrated satisfactory cyclic stability.
Article
Energy & Fuels
Chengda Li, Yueli Wen, Bin Wang, Maohong Fan, Wenlong Liu, Zheng Cui, Wei Huang
Summary: Activation and desorption of hydrogen in toluene methyl is the rate-limiting step for side-chain alkylation of toluene with methanol. In this study, two dehydrogenation strategies were employed to enhance catalytic performance by introducing Cu as a dehydrogenation component in PAl-NaX catalyst and adjusting the acid-base properties through varying NaOH loading. The relationship between the percentage of acid-base sites, low valence Cu species, and catalytic performance was investigated using various characterization techniques and ternary regression analysis. The results showed that Cu, especially low valence Cu species, promoted the selectivity of side-chain alkylation products to some extent, but base sites played a more critical role in enhancing selectivity.
Article
Chemistry, Physical
Lulu Ping, Yuan Zhang, Baojun Wang, Maohong Fan, Lixia Ling, Riguang Zhang
Summary: Based on favorable thermodynamics and coking resistance, chemical looping oxidative dehydrogenation (CL-ODH) of ethane over IrO2 catalyst was studied. Two extreme states of the IrO2 surface structure, S-IrO2 and R-IrO2, were considered. It was found that the mechanisms of ethane dehydrogenation over S-IrO2 and R-IrO2 catalysts were different. The present study contributes to the understanding of ethane CL-ODH over metal oxide catalysts and provides valuable insights for process optimization and catalyst development.
Article
Chemistry, Multidisciplinary
Bo Chen, Lei Zhang, Huihui Luo, Liang Huang, Peipei He, Gaijun Xue, Hongliang Liang, Wen Dai
Summary: This article describes a manganese oxide-catalyzed auto-tandem catalysis strategy that enables direct synthesis of amides from unsaturated hydrocarbons by coupling oxidative cleavage with amidation. This method features excellent functional group tolerance, a broad substrate scope, flexible late-stage functionalization, facile scalability, and a cost-effective and recyclable catalyst.
Article
Chemistry, Multidisciplinary
Runping Ye, Lixuan Ma, Xiaoling Hong, Tomas Ramirez Reina, Wenhao Luo, Liqun Kang, Gang Feng, Rongbin Zhang, Maohong Fan, Riguang Zhang, Jian Liu
Summary: This study presents a strategy to enhance the low-temperature CO2 activation through regulating the local electron density of active sites. An optimized Ni/ZrO2 catalyst exhibits excellent performance for CO2 methanation, with high CO2 conversion, CH4 selectivity, and stability, making it one of the best Ni-based catalysts for CO2 methanation to date.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
