Article
Multidisciplinary Sciences
Felix M. Kirchberger, Yue Liu, Philipp N. Plessow, Markus Tonigold, Felix Studt, Maricruz Sanchez-Sanchez, Johannes A. Lercher
Summary: The presence of water critically influences the kinetics of methanol autocatalytic conversion to hydrocarbons in acid zeolites. The main reactions at the initiation stage involve hydrogen transfer from methanol and DME to surface methoxy groups, leading to methane and formaldehyde in a 1:1 stoichiometry. The kinetic analysis of CH4 formation rates can be used as a unique quantitative parameter to characterize catalyst activity in the methanol-to-hydrocarbon process.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Puneet Kumar Chaudhary, Racha Arundhathi, Mahesh W. Kasture, Chanchal Samanta, Rakesh Vankayala, Chiranjeevi Thota
Summary: Crystalline beta zeolite molecular sieve with a SiO2/Al2O3 molar ratio of 28.5 was synthesized by hydrothermal crystallization and used for methanol dehydration. The micro-mesoporous beta zeolite exhibited good activity between 280 and 450°C. Dimethyl ether (DME) was the predominant product at all reaction temperatures, with a maximum selectivity of 47.9% at 300°C and a methanol turnover frequency (TOFMeOH) of 741.9 h(-1). The crystallinity, porosity, and acidity of beta zeolite were found to change in the reaction environment. Amorphous carbon deposition occurred, leading to a decrease in crystallinity to some extent. Pore broadening was observed at elevated temperatures. Regeneration cycle testing showed stable activity of beta zeolite over a 280-hour time-on-stream period.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Chemistry, Physical
Xinde Sun, Yue Yang, Yanli He, Shukui Zhu, Zhongmin Liu
Summary: By optimizing Si/Al ratio and hydrothermal treatment temperature, a high performance HZSM-5 catalyst was developed for liquid phase dehydration of methanol to dimethyl ether (DME). During a long term test of 6788 hours, DME selectivity remained above 99.96% with only slight deactivation observed, primarily attributed to coking and decline of HZSM-5 crystallinity.
Article
Energy & Fuels
Saeed Sahebdelfar, Parisa Moghimpour Bijani, Fereydoon Yaripour
Summary: The kinetics of deactivation of gamma-alumina catalyst in the dehydration of methanol to dimethyl ether were investigated, revealing a second-order independent deactivation kinetics that accurately fit the experimental data. The activation energies for the main reaction and catalyst deactivation were obtained, with the latter showing a negative value due to reversible partial hydration. At higher temperatures, irreversible sintering of alumina crystallites became the predominant deactivation mechanism.
Article
Engineering, Chemical
Pei He, Jianhao Wang, Ying Li, Shouying Huang, Mei-Yan Wang, Yue Wang, Jing Lv, Xinbin Ma
Summary: Microporous zeolites are commonly used as industrial catalysts, with Bronsted acidity playing a crucial role in their performance and stability. This study demonstrates an efficient synthesis method for MOR zeolite, which maintains specific acidity while shortening the synthesis period. The ultrafast synthesis method shows no negative impact on the textural and acidic properties of zeolites, resulting in improved catalytic activity and stability for MOR.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Multidisciplinary Sciences
Aisyah Ardy, Dwi Hantoko, Jenny Rizkiana, Melia Laniwati Gunawan, Mi Yan, Herri Susanto
Summary: This study aimed to investigate the effect of phosphorus addition on the γ-Al2O3 catalyst for methanol dehydration to DME synthesis. The results showed that the 5%P/gamma-Al2O3 catalyst exhibited good performances with medium acidity for the dehydration of methanol to DME.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
M. A. Armenta, Luis H. Alvarez, V. M. Maytorena, D. A. Buentello-Montoya, R. Silva-Rodrigo, A. Olivas, L. A. Flores-Sanchez
Summary: The wet impregnation method was used to support Ag2O, CuO, and Ag2O-CuO nanoparticles on gamma-chi-Al2O3 to evaluate their catalytic capabilities in the methanol dehydration (MD) reaction for dimethyl ether (DME) production. The Ag2O-CuO/gamma-chi-Al2O3 catalyst showed high catalytic activity and stability.
Article
Chemistry, Applied
Miao Yu, Tianyu Mo, Hongyan Li, Songnan Li, Bin Lu, Jingxiang Zhao, Qinghai Cai
Summary: In this study, the surface acidity-basicity of NaZSM-5 was adjusted by simple impregnation in Fe3+ solution, leading to successful dehydration of methanol at lower reaction temperature with a conversion rate of over 90% and a selectivity of 100%. The acidic and basic sites on the catalyst surface were identified as the active sites, and the methanol adsorption behavior revealed the catalytic role of the acid-base balance. Furthermore, the catalyst showed super high stability without coke generation after continuous running for 500 hours.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Chemical
Tianyu Mo, Miao Yu, Hongyan Li, Songnan Li, Bin Lu, Jingxiang Zhao, Qinghai Cai
Summary: CrOx nanoparticle-and H+-modified NaZSM5 composites were prepared and characterized. The composites showed moderate surface acidity and basicity, resulting from the substitution of Cr species or H+ for counter Na+ and the highly dispersed CrOx nanoparticles on zeolites. The composites exhibited excellent performance in catalyzing methanol dehydration to dimethyl ether, with over 90% conversion and nearly 100% selectivity at lower reaction temperature. The activity remained stable over 500 hours of continuous operation, indicating excellent running stability.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Xiujuan Gao, Junfeng Zhang, Faen Song, Qingde Zhang, Yizhuo Han, Yisheng Tan
Summary: Methanol and dimethyl ether (DME) serve as important platform compounds in the coal chemical, petrochemical, and fine chemical industries. The synthesis of methanol/DME has been industrialized, but with a production capacity exceeding market demand. To make better use of these compounds, the selective oxidation of methanol/DME to produce high value-added chemicals has gained significant attention for its green and environmentally friendly nature. This article provides a summary of recent advancements in the synthesis of formaldehyde, methyl formate, dimethoxymethane, and polyoxymethylene dimethyl ethers through selective oxidation of methanol/DME. The article also explores the challenges and prospects in catalyst design and application, aiming to provide theoretical guidance for activating and cleaving C-O, C-H, or O-H bonds in other alcohol/ether molecules and low-carbon alkanes to synthesize high value-added chemicals.
CHEMICAL COMMUNICATIONS
(2022)
Article
Energy & Fuels
M. A. Armenta, V. M. Maytorena, R. Silva-Rodrigo, L. A. Flores-Sanchez, J. M. Quintana, A. Olivas
Summary: In this study, a low-cost synthesis method was used to prepare the Fe2O3/????Al2O3 catalyst, which showed a significant improvement in methanol dehydration conversion rate and selectivity towards DME. The Fe2O3/????Al2O3 catalyst exhibited a stable structure and low activation energy, making it a promising candidate for methanol dehydration under specific conditions.
Article
Chemistry, Physical
Jasper van Kampen, Jurriaan Boon, Martin van Sint Annaland
Summary: Separation enhanced reaction processes are promising for carbon dioxide utilisation. In situ water removal results in high conversions and avoids the drawbacks of conventional methods. Membrane and adsorption technologies have shown great advancements in the direct production of methanol and dimethyl ether.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Energy & Fuels
Fatima Magzoub, Shane Lawson, Fateme Rezaei, Ali A. Rownaghi
Summary: Additive manufacturing, also known as 3D printing, was used to produce customizable heterogeneous catalysts for the conversion of methanol into dimethyl ether. Among the catalysts tested, the one containing 4 wt % Ga2O3 alongside ZSM-5 showed the best performance at 200 degrees C, achieving 85% methanol conversion and 74% DME selectivity.
Article
Chemistry, Multidisciplinary
Andrey Trypolskyi, Alexey Zhokh, Valentina Gritsenko, Mengyao Chen, Jianguo Tang, Peter Strizhak
Summary: The intrinsic kinetics of methanol dehydration to dimethyl ether over commercial ZSM-5 zeolite was studied theoretically and experimentally to establish the rate equation. Kinetic models based on Langmuir-Hinshelwood and Eley-Rideal formalism were proposed, with experimental verification showing a good correspondence with the L-H kinetics. In contrast, the E-R models provided an insufficient description of the methanol dehydration kinetics.
Article
Chemistry, Multidisciplinary
Xin He, Xin Wen, Ke Wu, Haichao Liu
Summary: A novel route for the sustainable synthesis of Vinyl Methyl Ether (VME) from biomass-derived ethylene glycol dimethyl ether (EGDE) catalyzed by CaO-MgO catalyst at atmospheric pressure has been reported. The strongly basic sites on CaO-MgO surfaces facilitated the formation of VME, achieving high efficiency and stability. This work provides a viable and sustainable strategy for the synthesis of VME and other high-value vinyl compounds from biomass.
Article
Chemistry, Applied
Maoyi Yi, Jie Li, Mengran Wang, Xinming Fan, Bo Hong, Zhian Zhang, Aonan Wang, Yanqing Lai
Summary: In this study, polyacrylic acid (PAA) was used as a binder for the cathode in all-solid-state batteries. Through H+/Li+ exchange reaction, a uniform PAA-Li coating layer was formed on the cathode surface, improving the stability of the cathodic interface and the crystal structure. The SC-NCM83-PAA cathode exhibited superior cycling performance compared to traditional PVDF binder.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Yonghan Zhou, Zhongfeng Ji, Wenrui Cai, Xuewei He, Ruiying Bao, Xuewei Fu, Wei Yang, Yu Wang
Summary: By learning from the pencil-writing process, a solid-ink rubbing technology (SIR-tech) has been invented to develop durable metallic coatings on diverse substrates. The composite metallic skin by SIR-tech outperforms pure liquid-metal coating and shows great potential for various applications.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Ruiqi Tian, Hehe Zhang, Zeyu Yuan, Yuehua Man, Jianlu Sun, Jianchun Bao, Ming-Sheng Wang, Xiaosi Zhou
Summary: In this study, polypyrrole-encapsulated Sb2WO6 microflowers were synthesized and demonstrated to exhibit excellent potassium storage properties and cycling stability. The improved performance of Sb2WO6@PPy was attributed to the unique microflower structure, enhanced electronic conductivity, and protective PPy coating.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Review
Chemistry, Applied
Longxing Wu, Zhiqiang Lyu, Zebo Huang, Chao Zhang, Changyin Wei
Summary: This paper presents a comprehensive survey on physics-based state of charge (SOC) algorithms applied in advanced battery management system (BMS). It discusses the research progresses of physical SOC estimation methods for lithium-ion batteries and presents future perspectives for this field.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Honggang Huang, Yao Chen, Hui Fu, Cun Chen, Hanjun Li, Zhe Zhang, Feili Lai, Shuxing Bai, Nan Zhang, Tianxi Liu
Summary: The d-d orbital coupling induced by crystal-phase engineering effectively adjusts the electronic structure of electrocatalysts, improving their activity and stability, which is significant for electrocatalyst research.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Quanzhen Sun, Yifan Li, Caixia Zhang, Shunli Du, Weihao Xie, Jionghua Wu, Qiao Zheng, Hui Deng, Shuying Cheng
Summary: In this study, indium (In) ions were introduced into flexible Cu2ZnSn(S,Se)(4) (CZTSSe) solar cells to modify the back interface and passivate deep level defects in CZTSSe bulk. The results showed that In doping effectively inhibited the formation of secondary phase and V-Sn defects, decreased the barrier height at the back interface, passivated deep level defects in CZTSSe bulk, increased carrier concentration, and significantly reduced the V-OC deficit. Eventually, a flexible CZTSSe solar cell with a power conversion efficiency of 10.01% was achieved. This synergistic strategy of interface modification and bulk defects passivation through In incorporation provides a new approach for fabricating efficient flexible kesterite-based solar cells.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Negah Hashemi, Jafar Hussain Shah, Cejun Hu, Subhajit Nandy, Pavlo Aleshkevych, Sumbal Farid, Keun Hwa Chae, Wei Xie, Taifeng Liu, Junhu Wang, Mohammad Mahdi Najafpour
Summary: This study investigates the effects of Fe on the oxygen-evolution reaction (OER) in the presence of Au. The study identifies two distinct areas of OER associated with Fe and Au sites at different overpotentials. Various factors were varied to observe the behaviors of FeOxHy/Au during OER. The study reveals strong electronic interaction between Fe and Au, and proposes a lattice OER mechanism based on FeOxHy.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Yingshi Su, Yonghui Cheng, Zhen Li, Yanjia Cui, Caili Yang, Ziyi Zhong, Yibing Song, Gongwei Wang, Lin Zhuang
Summary: This study systematically investigates the key roles of Nafion on Cu nanoparticles electrocatalyst for CO2RR. The Nafion modifier suppresses the hydrogen evolution reaction, increases CO2 concentration and mass transfer process, and activates CO2 molecule to enhance C2 product generation. As a result, the selectivity of the hydrogen evolution reaction is reduced and the efficiency of C2 products is significantly improved.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Daijie Deng, Honghui Zhang, Jianchun Wu, Xing Tang, Min Ling, Sihua Dong, Li Xu, Henan Li, Huaming Li
Summary: By doping sulfur into vanadium nitride, the S-VN/Co/NS-MC catalyst exhibits enhanced oxygen reduction reaction activity and catalytic performance. When applied in liquid and flexible ZABs, it shows higher power density, specific capacity, and cycling stability.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Review
Chemistry, Applied
Yi Li, Fei Zhang
Summary: Self-assembly of metal halide perovskite nanocrystals holds significant application value in the fields of display, detector, and solar cell due to their unique collective properties. This review covers the driving forces, commonly used methods, and different self-assembly structures of perovskite nanocrystals. Additionally, it summarizes the collective optoelectronic properties and application areas of perovskite superlattice structures, and presents an outlook on potential issues and future challenges in the development of perovskite nanocrystals.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Anki Reddy Mule, Bhimanaboina Ramulu, Shaik Junied Arbaz, Anand Kurakula, Jae Su Yu
Summary: Direct growth of redox-active noble metals and rational design of multifunctional electrochemical active materials play crucial roles in developing novel electrode materials for energy storage devices. In this regard, silver (Ag) has attracted great attention in the design of efficient electrodes. The construction of multifaceted heterostructure cobalt-iron hydroxide (CFOH) nanowires (NWs)@nickel cobalt manganese hydroxides and/or hydrate (NCMOH) nanosheets (NSs) on the Ag-deposited nickel foam and carbon cloth (i.e., Ag/ NF and Ag/CC) substrates is reported. The as-fabricated Ag@CFOH@NCMOH/NF electrode delivered superior areal capacity value of 2081.9 μA h cm-2 at 5 mA cm-2. Moreover, as-assembled hybrid cell based on NF (HC/NF) device exhibited remarkable areal capacity value of 1.82 mA h cm-2 at 5 mA cm-2 with excellent rate capability of 74.77% even at 70 mA cm-2. Furthermore, HC/NF device achieved maximum energy and power densities of 1.39 mW h cm-2 and 42.35 mW cm-2, respectively. To verify practical applicability, both devices were also tested to serve as a self-charging station for various portable electronic devices.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Zanling Huang, Shuqi Zhu, Yuan Duan, Chaoran Pi, Xuming Zhang, Abebe Reda Woldu, Jing-Xin Jian, Paul K. Chu, Qing-Xiao Tong, Liangsheng Hu, Xiangdong Yao
Summary: In this study, it was found that Ni sites act as a host to attract Fe(III) to form Fe(Ni)(III) binary centers, which promote the oxygen evolution reaction (OER) activity and stability by cyclical formation of intermediates. Additionally, other ions can also catalyze the OER process on different electrodes.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Jie Zeng, Jian Bao, Ya Zhang, Xun-Lu Li, Cui Ma, Rui-Jie Luo, Chong-Yu Du, Xuan Xu, Zhe Mei, Zhe Qian, Yong-Ning Zhou
Summary: The balance between cationic redox and oxygen redox is crucial for achieving high energy density and cycle stability in sodium batteries. This study demonstrates the reversible Mn2+/Mn4+ redox in a P3-Na0.65Li0.2Co0.05Mn0.75O2 cathode material through Co substitution, effectively suppressing the contribution of oxygen redox and improving structure stability.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Daniela M. Josepetti, Bianca P. Sousa, Simone A. J. Rodrigues, Renato G. Freitas, Gustavo Doubek
Summary: Lithium-oxygen batteries have high energy density potential but face challenges in achieving high cyclability. This study used operando Raman experiments and electrochemical impedance spectroscopy to evaluate the initial discharge processes in porous carbon electrodes. The results indicate that the reaction occurs at the Li2O2 surface and the growth of Li2O2 forms a more compact and homogeneous structure.
JOURNAL OF ENERGY CHEMISTRY
(2024)
Article
Chemistry, Applied
Ziqi Zhang, Jinyun Xu, Yu Zhang, Liping Zhao, Ming Li, Guoqiang Zhong, Di Zhao, Minjing Li, Xudong Hu, Wenju Zhu, Chunming Zheng, Xiaohong Sun
Summary: This paper explores the challenge of increasing global CO2 emissions and highlights the role of porous metal oxide materials in electrocatalytic reduction of CO2 (CO2RR). Porous metal oxides offer high surface area and tunability for optimizing CO2RR reaction mechanisms.
JOURNAL OF ENERGY CHEMISTRY
(2024)