Article
Energy & Fuels
Yanpeng Ban, Lijun Jin, Jialong Zhu, Fanggang Liu, Haoquan Hu
Summary: This study investigated the catalytic effects of Ca(OH)2 on the pyrolysis of coal and found that the addition of calcium promoted gas and water release, reduced the yields of char and tar, and affected the composition and distribution of pyrolysis products. The results demonstrated that calcium species could change the thermal reaction process of oxygen-containing functional groups in coal, thereby regulating the distribution of pyrolysis products.
Article
Energy & Fuels
Wei Feng, Mo Zheng, Lijun Jin, Jin Bai, Lingxue Kong, Huaizhu Li, Zongqing Bai, Wen Li
Summary: In this study, the co-pyrolysis behaviors of low-rank coal and polyethylene plastics were systematically explored using a combination of experimental and simulation techniques. The experimental results showed a positive interaction between coal and PE during co-pyrolysis, leading to an increase in volatile yield with PE addition. The simulation results complemented the experimental observations and revealed the bond-breaking reactions and gas evolving trends during the co-pyrolysis process.
Article
Energy & Fuels
Xian-Hou Guo, Xian-Yong Wei, Lin Hu, Xue-Jing Liu, Mei-Xia Chen, Mei-Ling Xu, Zhi-Min Zong
Summary: A middle/low-temperature coal tar from Northern Shaanxi Province was extracted and analyzed by three mass spectrometers, revealing the presence of aliphatics, arenes, oxygen-containing organic compounds and nitrogen-containing organic compounds as the main group components. Further analysis using two-dimensional gas chromatography/time-of-flight mass spectrometry detected nearly 1000 different compounds, including aliphatics, arenes, OCOCs (mainly O-1 and O-2), NCOCs, and SCOCs. Additionally, ESI Orbitrap-mass spectrometry showed the relative abundances of NCOCs, OCOCs, and SCOCs in positive ion mode, as well as OCOCs and NCOCs in negative ion mode, providing insights into the condensation degree of aromatics and existing forms of heteroatoms.
Article
Chemistry, Analytical
Yi Yu, Jichun Jiang, Lei Hua, Yiqian Xu, Chuang Chen, Yi Chen, Haiyang Li
Summary: The ion conversion processes in CH2Cl2-enhanced vacuum ultraviolet photoionization of oxygenated volatile organic compounds (OVOCs) were studied by regulating pressure, humidity, and reaction time in the ionization source. The main characteristic ions changed with varying pressure, and interconversion between ions through ion-molecule reactions was observed with increasing humidity. The intensity of protonated methanol/ethanol ion was linearly correlated with the intensity of hydrated hydronium ions, indicating a proton transfer reaction mechanism. The reaction time was regulated by the electric field strength, and step-by-step ion-molecule reactions were observed. This study provides insights into the formation mechanism of intermediate product ions and hydrated hydronium ions in dopant-enhanced VUV photoionization and helps optimize experimental conditions for enhancing the sensitivity of OVOCs.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jingxiong Yu, Fanggang Liu, Zefeng Deng, Zaifa Shi, Jiangle Zhang, Qiaolin Wang, Jing Yang, Haoquan Hu, Zhengbo Qin, Zichao Tang
Summary: In this study, LIAD-VUVPI-TOFMS technique was used for structural analysis of coal extracts, which provided intact molecular weight information. By separating the extracts using column chromatography, the molecular weight and structure of the components were obtained, and a total of 248 chemical species were observed.
Article
Environmental Sciences
Bongekile Vilakati, Sivasankar Venkataraman, Hlengilizwe Nyoni, Bhekie B. Mamba, Kiyoshi Omine, Titus A. M. Msagati
Summary: A pyrolysis GC-ToF-MS-based analytical study was conducted to identify microplastics in the freshwater of Rietvlei dam in Gauteng Province, South Africa. The study found that the microplastics contained different plastic polymers and additives, with PA being the most dominant polymer. The presence of microplastics in the freshwater is likely caused by industrial activities and poor waste management, and it can have negative impacts on the ecosystem and human health.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biochemical Research Methods
Diego de O. Rogerio, Reinaldo L. Cavasso-Filho, Alexsandre F. Lago
Summary: The dissociative photoionization dynamics of the chloroacetone molecule in the gas phase induced by VUV synchrotron radiation has been investigated. The appearance energies for relevant cation fragments, fragmentation pathways, and cation species have been analyzed and discussed. In addition, structural and energetic parameters of the cations were examined based on quantum chemical numerical calculations.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2021)
Article
Chemistry, Analytical
Yunfei Wu, Jialong Zhu, Juan Yang, Lijun Jin, Haoquan Hu
Summary: The co-pyrolysis mechanism of Pingshuo coal and low-density polyethylene was explored using in-situ pyrolysis time-of-flight mass spectrometry with vacuum ultraviolet photoionization and electron para-magnetic resonance. The results showed that different mixing configurations had a significant impact on the release of volatiles.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Plant Sciences
Reda F. A. Abdelhameed, Sameh S. Elhady, Alaa Sirwi, Hanan Samir, Elsayed A. Ibrahim, Ama Kyeraa Thomford, Alaa El Gindy, Ghada M. Hadad, Jihan M. Badr, Mohamed S. Nafie
Summary: The study investigated the antioxidant and cytotoxic activities of Thonningia sanguinea whole-plant extract, showing significant cytotoxic activity against MCF-7 and HepG2 cells through apoptosis induction and antioxidant activation. The phenolic extract exhibited promising bioactivity, suggesting the potential for further development as a novel anti-cancer agent.
Article
Biotechnology & Applied Microbiology
S. I. Ekonomou, F. F. Parlapani, M. Kyritsi, C. Hadjichristodoulou, I. S. Boziaris
Summary: This study monitored the storage of vacuum-packed hot smoked rainbow trout fillets from two different smokehouses in Greece at different temperatures and observed changes in microbiology. The shelf-life of the products differed between the two smokehouses. The study also identified and classified microbial communities grown at different pH levels.
Article
Chemistry, Physical
Shuaidan Li, Jiazhu Li, Jie Xu
Summary: The study found that the changes of pyrolysis products during the co-pyrolysis process of biomass and coal are similar to that in the separate pyrolysis process, with main pyrolysis products released at different temperatures. Additionally, most of the raw materials are independently pyrolyzed during the co-pyrolysis process, and the addition of biomass does not significantly affect the content variations of aromatic compounds.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Yuan Jiang, Peijie Zong, Bin Tian, Xue Ming, Fanfan Xu, Yuanyu Tian, Yingyun Qiao, Dawei Li, Qingshuo Song, Qiankun Yu
Summary: Studying the pyrolysis behavior of the saturate component in coal, which mainly consists of volatile substances, through the combined utilization of TG-FTIR and Py-GC/MS revealed a free radical reaction mechanism. The research provides a methodological model for exploring other group components and reveals specific details about the pyrolysis of coal.
Article
Chemistry, Multidisciplinary
Hao Yin, Jie Lu, Guijian Liu, Zhiyuan Niu, Xiangping Zha, Dun Wu, Airong Feng, Yanyun Hu
Summary: Investigating the molecular composition of coal pyrolysis products can improve nonfuel utilization of coal, although it remains a challenge due to the complexity of coal. The study found that bituminous coal pyrolysis products can be classified into aromatic and aliphatic groups, and different types of coal can be explained based on their depositional environments and δC-13(VPDB) values.
Article
Energy & Fuels
Peixuan Xue, Ming Liu, Haiping Yang, Han Zhang, Yingquan Chen, Qiang Hu, Shihong Zhang, Hanping Chen
Summary: Accurately revealing the interactions between biomass components is crucial for selectively preparing and exploiting pyrolysis products. Using an online photoionization time-of-flight mass spectrometer (PI-TOF-MS), the study examines a simplified coupled cross-pyrolysis process to depict the real complicated pyrolysis reactions and elucidate the interaction mechanism. Results show that the interaction only affects product distribution and does not create new pyrolysis reaction pathways. The findings contribute to improving knowledge of biomass pyrolysis interaction and can be used as a reference for targeted biomass utilization and catalytic pyrolysis optimization strategies.
Article
Environmental Sciences
Zhi-Cong Wang, Pei-Gao Duan, Kai Wang
Summary: A Pyroprobe 5000 pyrolyzer connected to Py-GC-TOF-MS was used to analyze the decomposition behavior of waste tires. The study found that temperature and time had significant effects on the molecular composition and relative contents of the liquid products. The addition of zeolites also greatly affected the composition of the liquid products.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)