Article
Energy & Fuels
Renze He, Hui Liu, Qiuxiang Lu, Yanwei Zhao, Xianyang Wang, Xiaoguang Xie, Xiaoling Deng, Shenfu Yuan
Summary: This study investigates the effects of Si and Al on Fe catalyst, as well as the activity of promoters (K, Na, Ca, and Mg) on Fe catalyst. The results show that an appropriate amount of Si or Al can enhance the activity of Fe catalyst, while high concentrations inhibit the activity. Si inhibits the reduction of FeO to Fe, while Al inhibits FeO reduction through the generation of FeO·Al2O3. Additionally, Ca-Fe compounds facilitate the formation of H2, while Mg-Fe compounds promote the generation of liquid.
Article
Polymer Science
Tianyi Ma, Rui Wang, Wenqing Wang, Weiwen Gu, Ye Yuan, Anying Zhang, Jianfei Wei
Summary: The thermal degradation mechanism of PET and CEPPA/PET copolymer was investigated by experimental and theoretical methods. The results showed that CEPPA/PET copolymer degraded more easily than PET and produced more 4-carboxybenzaldehyde.
POLYMER DEGRADATION AND STABILITY
(2022)
Article
Thermodynamics
Xun Zhang, Bing Lu, Ling Qiao, Cong Ding
Summary: This study investigates the influence of OH free radicals on the reactivity of aromatic rings and their side chain active groups through simulations and experiments. The results show that the reaction energy barriers of OH radicals with aromatic hydrocarbons are low and phenolic hydroxyl and benzene rings further enhance the reactivity of the aromatic ring C-H. It is concluded that OH radicals participate in the formation of the phenolic hydroxyl structure and catalyze the oxidation reaction of coal at low temperatures.
Article
Energy & Fuels
Zhongxun Tian, Bin Chen, Xihe Qiu, Weijun Liu, Yun Guo
Summary: This study investigated the impact of electric field on kerogen, the main component of oil shale, using density functional theory. The results showed that electric field has different effects on certain elementary reactions, and the change in reaction energy barrier is primarily attributed to the electrostatic interaction influenced by the electric field. Additionally, the reactivity of kerogen can be enhanced by electric field.
Review
Green & Sustainable Science & Technology
S. M. Gouws, Marion Carrier, J. R. Bunt, H. W. J. P. Neomagus
Summary: Thermochemical conversion via co-pyrolysis has the potential to efficiently convert biomass to bio-energy and bio-refinery products. Torrefied biomass prior to co-pyrolysis shows fundamental advantages such as decreased limitations and improved oil quality, making it a promising option for bioenergy production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Pharmacology & Pharmacy
Mario Saletti, Marco Paolino, Lavinia Ballerini, Germano Giuliani, Gemma Leone, Stefania Lamponi, Marco Andreassi, Claudia Bonechi, Alessandro Donati, Daniele Piovani, Alberto Giacometti Schieroni, Agnese Magnani, Andrea Cappelli
Summary: An easy and viable crosslinking procedure using click-chemistry was developed for hyaluronic acid. The resulting crosslinked materials showed no cytotoxic effects, tunable water affinity, and rheological properties, suggesting potential applications in different biomedical fields.
Article
Chemistry, Multidisciplinary
Qinghua Guo, Yuchen Huang, Qing He, Yan Gong, Guangsuo Yu
Summary: The study found that coal char prepared by wet impregnation had higher reactivity, and the optimal addition method is wet impregnation with a 2% catalyst. The iron-based catalyst can accelerate the gasification rate and provide higher catalytic activity.
Article
Chemistry, Multidisciplinary
R. R. Dirgarini Julia Nurlianti Subagyono, Wardina Masdalifa, Siti Aminah, Rudy Agung Nugroho, Mamun Mollah, Veliyana Londong Allo, Rahmat Gunawan
Summary: The co-pyrolysis of green microalgae Botryococcus braunii and Victorian brown coal was studied using different methods for thermogravimetric analysis. Results showed that mixing the two samples increased the thermal decomposition temperature and average activation energy, mainly due to the presence of compounds in the brown coal that require higher temperatures for pyrolysis.
Review
Chemistry, Multidisciplinary
Kostiantyn Kozoriz, Olha Shkel, Kyung Tae Hong, Dong Hoon Kim, Yun Kyung Kim, Jun-Seok Lee
Summary: Despite advancements in genome sequencing, the complete molecular interaction networks of gene products are still not well understood due to a lack of robust profiling techniques. The photo-cross-linking technique is a promising tool for studying molecular interactions in live cells, as it allows for the capture and labeling of biomolecules. This Account provides an overview of recent advances in multifunctional photo-cross-linkers for drug target identification and bioimaging, showcasing their potential in the rational design of new therapeutic approaches.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Energy & Fuels
Xiao Ye, Anyao Jiao, Hai Zhang, Bin Chen, Sha Wang, Jun Shen, Zhenrong Yan, Shengxiang Deng, Xiangxin Han, Xiumin Jiang, Mengxue Yuan
Summary: This paper investigates the thermochemical reaction of organic carbon and H free radical during oil shale retorting process using transition state theory and density functional theory. The study explores the effect of different functional groups on the reactions and elucidates the mechanisms through multiple reaction paths. The presence of H free radical promotes cracking process of carbon chains in kerogen and changes the H adsorption capacity of organic carbons due to charge re-distribution caused by functional groups.
Article
Energy & Fuels
Bin Hu, Wen-luan Xie, Yu-ting Wu, Ji Liu, Shan-wei Ma, Ti-peng Wang, Shu Zheng, Qiang Lu
Summary: Furfural (FF) is a promising platform compound that can be selectively produced by the fast pyrolysis of xylan-based biomass in the presence of zinc chloride (ZnCl2). The catalytic effect of ZnCl2 on the pyrolysis reactions involves binding of Zn and O atoms initially, with electron exchange between them, promoting FF formation. The distinct influence of ZnCl2 on different reactions changes the rate-determining steps and alters the competitiveness of FF formation pathways.
Article
Polymer Science
Manoj Kumar Maurya, James Wu, Manjesh Kumar Singh, Debashish Mukherji
Summary: Understanding the heat flow in polymers is crucial for designing advanced functional materials. Traditional approaches to increase the thermal conductivity involve semicrystallinity and cross-linking, but a combination of both effects does not always result in an increase of thermal conductivity. Instead, the tunability of thermal conductivity in polymer networks is determined by a delicate competition between lattice periodicity, cross-linker types, and bond density.
Article
Chemistry, Applied
M. V. Pazo-Cepeda, N. S. Nastasiienko, T. V. Kulik, B. B. Palianytsia, E. Alonso, S. G. Aspromonte
Summary: The adsorption of aqueous ferulic acid (FA) solution on protonic zeolites was investigated. Three types of zeolites and various adsorption parameters were analyzed and optimized. The HY zeolite with a SiO2/Al2O3 ratio of 12 exhibited a high adsorption percentage of 90% at 30°C, 5 minutes, 10 g L-1, and pH <= 3. UV-Vis DRS and FTIR spectroscopies revealed the structures of the adsorption complexes formed by the interaction between the FA molecule and the zeolite surface, involving phenol and carboxyl groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Engineering, Chemical
Zhongyun Liu, Wulin Qiu, Wenying Quan, Yang Liu, William J. Koros
Summary: Thermally cross-linkable 6FDA-based polyimides containing carboxyl groups were synthesized and cross-linked to dense films via decarboxylation-induced thermal crosslinking. The content of 3,5-diaminobenzoic acid significantly affected the structure evolution during the crosslinking process. These materials provide attractive gas separation performance and plasticization resistance, making them a versatile platform for various aggressive natural gas feeds encountered in practice.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Qingmin Shi, Bingyang Kou, Shuangming Wang, Qiang Sun, Weifeng Xue, Ruijun Ji, Yue Cai
Summary: This study investigated the evolution of closed pores during pyrolysis of bituminous coal. The results showed that closed pores less than 0.09 μm increased with temperature, while closed pores in the range of 2-50 nm first decreased and then increased with temperature. Thermal swelling of the coal matrix at 300°C led to the generation of closed pores in the range of 50-90 nm. Volatiles generated at 500°C reduced the number of closed mesopores and increased the number of large closed pores. Condensation polymerization at 700°C increased the number of closed pores of all sizes.
NATURAL RESOURCES RESEARCH
(2023)
