Article
Chemistry, Physical
Lichao Ma, Chuanmin Ding, Junwen Wang, Hong Xu, Kan Zhang
Summary: In this study, in situ X-ray photoelectron spectroscopy was used to investigate the surface chemical properties of ceria supported precious metals materials under different gas conditions and reaction temperatures. The results show that the changes in oxygen vacancies and Pt valence on catalyst surface have a significant impact on the reaction performance. At low temperatures, gas-phase oxygen cannot be directly utilized, but can absorb on the oxygen vacancies and Pt, leading to the reduction of oxygen vacancies and oxidation of Pt. Only when the temperature is higher than 400 degrees C, reactive oxygen species can be generated and participate in the reaction, promoting the reaction continuous.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Donger Chen, Li-Hua Gan
Summary: Both partial oxidation and CO2 reforming can be used to produce syngas from natural gas. This study explores the possibility of combining the two methods using computational fluid dynamics and detailed chemical reaction mechanisms. The results show that the methane partial oxidation reactor used in industry can be directly used to convert CH4 and CO2 into syngas. The optimal overall ratio of reactants is 5:4:1 for CH4 to O-2 to CO2, and the optimal preheating temperature and inlet velocity are 923 K and 200-300 m/s, respectively.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Allan A. Rojas, Mojtaba Rezaei Koochi, Mikhail A. Varfolomeev, Vladislav A. Sudakov
Summary: This study investigated the catalytic activation mechanism of thermochemical fluids or binary mixtures (BMs) based on ammonium nitrate and sodium nitrite, and evaluated their activation effects under different reservoir conditions. The results showed that poor reservoir quality and injection rate were the dominant requirements for achieving more aggressive reservoir fracking, and the activation of BM in porous media exhibited a high pressure response. These findings are important for understanding the geology-injection requirements and the potential of using BM for well cleaning in thermal development.
Article
Engineering, Chemical
Yeojin Kim, Yesol Woo, Hyeon Park, Youngmin Kim, Ho-Jeong Chae, Myung-June Park
Summary: This paper proposes a kinetic model for the chlorination of methane in the presence of a catalyst. The model accurately describes the experimental data and provides insights into the factors influencing the reaction.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Polymer Science
Laura Matesanz-Nino, Carla Aguilar-Lugo, Pedro Pradanos, Antonio Hernandez, Camino Bartolome, Laura Palacio, Alfonso Gonzalez-Ortega, Michele Galizia, Cristina Alvarez, Angel E. Lozano, Jose G. de la Campa
Summary: Aromatic copolyimides and aromatic-aliphatic copolyimides were synthesized, and membranes with high thermal stability and good mechanical properties were obtained by selectively removing the PEO component. The presence of carboxylic groups minimized shrinkage during the cross-linking process. Membranes containing 10 mol% DABA exhibited excellent separation performance and resistance to plasticization.
Review
Chemistry, Physical
Shakir Ul Azam, Beata Orlinska
Summary: Carbon nanotubes and functionalized carbon nanotubes have significant applications as catalysts and catalytic supports in the liquid-phase aerobic oxidation of hydrocarbons. However, their catalytic activity is influenced by impurities in carbon nanotubes.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Yang Zhao, Di Wu, Ying Chen, Yang Li, Xiaobin Fan, Fengbao Zhang, Guoliang Zhang, Wenchao Peng
Summary: This study demonstrates that nitrogen-doped graphene with structural defects can effectively activate peroxymonosulfate for bisphenol A degradation. The synergistic effect between doped nitrogen atoms and created structural defects enhances the catalytic performance. The nonradical pathway is proposed to play the dominant role in the PMS activation process.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Michal Mlotek, Michalina Perron, Katarzyna Tutaj, Krzysztof Krawczyk
Summary: Biomass is a promising renewable energy source that can be converted into biogas and further into a mixture of hydrogen and carbon monoxide, broadening its potential applications and increasing the content of combustible gases. Water vapor content affects the conversion of reaction products and reduces soot formation. The use of a reduced cobalt catalyst leads to higher hydrogen content.
Article
Chemistry, Physical
Gianluca Pauletto, Nicole Libretto, Daria C. Boffito, Jeffrey T. Miller, Andreas Jentys, Gregory S. Patience, Johannes A. Lercher
Summary: Stranded natural gas has high operating and investment costs with conventional technologies, but milli-second reactors with high GHSV can reduce investment. A proposed Ni-based catalyst on FeCrAl knitted gauze can partially oxidize CH4 in air to syngas with high selectivity. Ru promoted catalysts have higher turnover rates in CH4 activation and Pt-containing catalysts form refractory carbon species. 2.25% Ni with 0.1% Ru shows the highest CH4 turnover rate and CO selectivity under specific conditions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Arnau Call, Giorgio Capocasa, Andrea Palone, Laia Vicens, Eric Aparicio, Najoua Choukairi Afailal, Nikos Siakavaras, Maria Eugenia Lopez Salo, Massimo Bietti, Miquel Costas
Summary: This research report presents a simple and general method for the synthesis of chiral γ-lactones through enantioselective oxidation of nonactivated primary and secondary C(sp(3))-H bonds in readily available carboxylic acids. The use of robust sterically encumbered manganese catalysts allows for outstanding enantioselectivities (up to >99.9%) and yields (up to 96%) using hydrogen peroxide as the oxidant. The resulting γ-lactones are of immediate interest for the preparation of natural products and recyclable polymeric materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Mathematics, Interdisciplinary Applications
Wenjing Zhu, Zijie Ling, Yonghui Xia, Min Gao
Summary: This paper investigates the bifurcations of exact solutions for the time-space fractional complex Ginzburg-Landau equation with parabolic law nonlinearity. Different kinds of first integrals for the corresponding traveling wave systems are found for different parameters. Using a dynamical systems method and different from previous works, the phase portraits of the corresponding traveling wave systems are obtained. Additionally, exact parametric representations of various wave solutions are derived under different parameter conditions.
FRACTAL AND FRACTIONAL
(2023)
Review
Energy & Fuels
Iren A. A. Makaryan, Eugene A. A. Salgansky, Vladimir S. S. Arutyunov, Igor V. V. Sedov
Summary: This review presents a comparative analysis of studies on hydrogen and syngas production through partial oxidation processes of natural gas and other gas feedstock. Non-catalytic autothermal partial oxidation of hydrocarbons shows high potential for gas chemistry and energetics, overcoming the limitations of traditional syngas production technologies. The features of non-catalytic partial oxidation, experimental results, kinetic modeling, industrial implementation, and alternative options are discussed, as well as the possibility of obtaining other chemical products.
Article
Chemistry, Multidisciplinary
Xiao-Lei Jiang, Yue-E Jiao, Sheng-Li Hou, Liang-Chen Geng, Hao-Zhe Wang, Bin Zhao
Summary: The study has successfully synthesized a copper-based framework with good catalytic performance, achieving high conversion rates and turnover frequencies in the reaction of propargylamines with CO2. This is a significant step towards achieving a green conversion process without solvents and co-catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Environmental
Paula Rapado, Laura Faba, Salvador Ordonez
Summary: This study investigates the potential of hydrogen peroxide as an oxidizing agent for furfural partial oxidation. A comprehensive mechanistic kinetic model is presented, which analyzes the activity of different catalysts and the selectivity for various oxidation products. The results highlight the crucial role of acidity, basicity, redox properties, and metal particle size in determining the selectivity of the process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Chih-Han Liu, Kevin Giewont, Todd J. Toops, Eric A. Walker, Caitlin Horvatits, Eleni A. Kyriakidou
Summary: Experimental results showed that NO in a diesel exhaust gas mixture can be oxidized without a catalyst due to the presence of decane, with ethylene also facilitating the oxidation process to a lesser degree. Density functional theory (DFT) calculations were conducted to investigate the possible initiating steps during decane consumption and NO oxidation process.
Review
Biotechnology & Applied Microbiology
Xiaoping Guan, Jinhao Bai, Jingchang Zhang, Ning Yang
Summary: This paper presents an overview of multiphase flow characteristics and modeling methods in polymer electrolyte membrane water electrolysis (PEMWE), emphasizing the significance of regulating the microstructure of the transport layer and distinguishing the effects of multiphase flow in the flow channel from those in the transport layer.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2024)
Article
Biotechnology & Applied Microbiology
Natasha J. Chrisandina, Shivam Vedant, Eleftherios Iakovou, Efstratios N. Pistikopoulos, Mahmoud M. El-Halwagi
Summary: This paper provides a brief review of recent progress in conceptual frameworks and quantitative metrics for analyzing and designing resilience-aware process systems, as well as discussing key research opportunities in the field of process system resilience, specifically the challenges in integrating resilience throughout the life cycle and across the spatiotemporal scales.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2024)
Article
Biotechnology & Applied Microbiology
Ya-Nan Yang, Jie Jin, Li-Tao Zhu, Yin-Ning Zhou, Zheng-Hong Luo
Summary: This article reviews the application of thermal runaway criteria, with emphasis on the significance of the divergence criterion. The general application procedures of the divergence criterion are illustrated through examples in process safety assessment, process parameter optimization, and process monitoring and control.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2024)
Article
Biotechnology & Applied Microbiology
Edirisooriya Mudiyanselage Nimanthi Thiloka Edirisooriya, Huiyao Wang, Sankha Banerjee, Karl Longley, William Wright, Walter Mizuno, Pei Xu
Summary: This study evaluates the economic feasibility of using alternative water sources for agriculture and identifies strategies to address the challenges. In the Southwest United States, the reuse of filtered disinfected municipal wastewater is the most cost-effective option. Using alternative water for irrigation faces challenges such as high costs, energy demand, concentrate disposal, and soil salinity management. Economic feasibility can be improved by implementing renewable energy-powered decentralized desalination systems.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2024)
Article
Biotechnology & Applied Microbiology
Manoj Kolel-Veetil
Summary: Recent advances in nonthermal plasma technology have led to remarkable progress in the remediation of PFAS, occurring at the water-bubble/air interface and increasingly in the bubble interiors, with simultaneous presence of multiple oxidative and reductive species.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2024)
