Article
Chemistry, Multidisciplinary
Xiaolong Wang, Xin He, Xiaohua Wang
Summary: The study investigated the single-stage extraction of coal tar residue using acetone, CS2, and acetone/carbon disulphide solvent. The results showed that different solvents extracted different components, with acetone and CS2 dissolving more aromatic structures containing fatty side chains, and mixed solvents extracting more phenolic substances. The infrared analysis revealed changes in the aromatic structure due to extraction, with increased proportions of tetrasubstituted or trisubstituted benzene rings and a significant decrease in pentasubstituted benzene rings. This research provides a reference basis for the separation and purification technology of coal tar residue, supporting the development of China's coal chemical industry.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Chaoshuai Hu, Hongyu Chu, Yaming Zhu, Yunliang Xu, Junxia Cheng, Lijuan Gao, Shiquan Lai, Xuefei Zhao
Summary: The study found that mesophase cokes derived from extract-based coal tar pitch have larger and more orderly graphite structure, while residue-based cokes have higher micro-strength intensity. The Tmax values of the two cokes are opposite, and all data of the two cokes exhibit bipolar distribution.
Article
Chemistry, Multidisciplinary
Phiciato Phiciato, Yudi Nugraha Thaha, Nono Darsono, Miftahul Huda
Summary: In this study, a feasible extraction method using benzene was proposed to refine the size of spherical mesophase. It was found that the solubility of the spherical mesophase in benzene is size-dependent, and can selectively dissolve spherical mesophases smaller than 5 μm. As a result, a monodisperse spherical mesophase was obtained.
Article
Energy & Fuels
Zhi-Hao Ma, Sheng Li, Chun Guo, Xue-Qian Dong, Jin-Hu Wang, Min Li, Xian-Hou Guo, Mei-Ling Xu, Xing-Shun Cong, Zhi-Min Zong, Xian-Yong Wei
Summary: A low-temperature coal tar (LTCT) was separated by dual-solvent systems, and the extraction process was intensively characterized using nonlinear fitting, linear fitting, GC/MS, and FTIR. The cumulative extract yield (CEY) conformed to a logistic model with a determination coefficient of 0.97. The highest extract yield was obtained using petroleum ether, followed by methanol and carbon disulfide. The LTCT and extracts contained various compounds categorized into 85 group components. The separation mechanism was explained by hydrogen bonds and van der Waals force, supported by quantum chemical calculations.
Article
Engineering, Environmental
Tao Zhang, Xiaobin Bing, Dan Wang, Jun Gao, Lianzheng Zhang, Dongmei Xu, Yuping Zhang, Yinglong Wang
Summary: In this study, two kinds of tetramethylguanidine-based ionic liquids were used to extract indole from low temperature coal tar model oil. The [TMG][Lac] showed higher extraction efficiency compared to [TMG][ClO4]. The extraction mechanism was found to be driven by hydrogen bonding interactions between the indole and the ILs, which can help in designing ILs for separating nitrogen-containing aromatic hydrocarbons from LTCT.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Metallurgy & Metallurgical Engineering
Shuang Sun, Dan Zou, Ji Chen, Yuefeng Deng
Summary: This study investigates the removal of radioactive Th(IV) from high-purity Sc2O3 using DEHEHP and the extraction behavior of Sc(III) from HNO3 solution using DEHEHP. The results show that DEHEHP exhibits excellent separation ability for Sc(III) and Th(IV) from HNO3 solution.
Article
Materials Science, Multidisciplinary
Erik Prasetyo, Corby Anderson, Arya Fitra Jaya, Widya Aryani Muryanta, Anton Sapto Handoko, Muhammad Amin, Muhammad Al Muttaqii, Fathan Bahfie
Summary: Solvent extraction and precipitation methods were used to separate and purify copper, cobalt, manganese, and nickel from the leachate of spent lithium-ion batteries. The metal separation was achieved by adjusting the pH and using different extractants.
Review
Energy & Fuels
Kapil Mamtani, Kaveh Shahbaz, Mohammed M. Farid
Summary: This study summarizes the application of deep eutectic solvents (DESs) in biodiesel production, including their roles as catalysts, cosolvents, and extracting solvents. The research shows that DESs demonstrate good performance and recyclability in all roles. More research is needed to explore the potential of deep eutectic solvents in the field of biodiesel production in the future.
Article
Environmental Sciences
Feiyue Gao, Chuncai Zhou, Zihao Wang, Weiwei Zhu, Wang Xin, Guijian Liu
Summary: Microwave-assisted extraction was studied to separate tar and residue in coal tar residue (CTR) in order to reduce the content of polycyclic aromatic hydrocarbons (PAHs). Experimental results showed that using a solvent with cyclic structure achieved a high extraction performance and increasing the solvent addition amount, radiation temperature, or radiation time within a certain range improved the extraction efficiency. The optimized conditions were determined as benzene as the extractant, solvent-solid ratio of 5:1 mL/g, radiation temperature of 75 degrees C, and radiation time of 10 min. The relative extraction efficiency of CTR was 28.70% and the reduction efficiency of 16 priority control PAHs was 92.82%. Extracted residue (MCTR) and tar (MCT) can be converted into value-added products (carbon materials, solid fuels, or chemicals) based on their characteristics under the optimum experimental conditions. Microwave-assisted extraction for solid-oil separation is a safe and high-valued utilization approach for CTR.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Qi Li, Tao Wang, Dongling Wu, Nannan Guo, Hong Meng
Summary: This study investigated the extraction of phenolic compounds from real coal tar using three novel halogen-free choline dihydrogen citrate (CDC)-alcohols deep eutectic solvents (DESs). The results showed that the extraction efficiency decreased with the extension of alkyl chain of alcohols. CDC-EG was selected as the appropriate extractant with an extraction efficiency of 89.3% under the optimal conditions. The hydrogen bond interaction between CDC and EG, as well as the hydrogen bond interactions between phenolic compounds and DES, were found to be the main driving forces for the separation of phenolic compounds from coal tar by DES.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
B. Avid, M. Battsetseg, B. Purevsuren, G. Shiirav, P. N. Kuznetsov, L. Kuznetsova, E. S. Kamenskii
Summary: The study found that coal tar was a more favorable solvent for coal dissolution compared to heavy cycle oil, and the properties of the extracts varied depending on the solvent used. There was a good correlation between extract aromaticity and the content of toluene insolubles, and the carcinogenic substance benzo(a)pyrene concentrations differed in the extracts depending on the solvents used.
Article
Energy & Fuels
Hu Wang, Hu Wen, Zhenbao Li, Rui Liang, Fengshuang Wang, Shixing Fan, Rijun Li
Summary: Liquid CO2 injection into coal seam for CH4 displacement is an important approach to enhance gas extraction and carbon sequestration. Research findings show that liquid CO2 interacts with coal through processes like liquid phase seepage-phase transformation supercharging-gas-liquid mass transfer, leading to changes in coal's pore distribution, surface chemical properties, and adsorption characteristics. By combining theoretical analysis, numerical simulation, and experimental testing, the study investigates the modification of coal body through liquid CO2 extraction. The results indicate that higher extraction pressure increases the diffusion rate of small organic molecules in coal, facilitates their dissolution, and affects the precipitation of small molecular organic matter in larger pores. Furthermore, liquid CO2 extraction does not significantly damage the macromolecular structure of coal, as observed from the similarity in infrared spectra between raw coal and residual coal after extraction. This research provides valuable insights for liquid CO2 antireflection coal seam and geological storage.
Article
Engineering, Chemical
He Li, Tariro Mabhiza, Yadong Ning, Zhihui Yu, Caixia Lv, Xiaobo Shen, Guangye Wei, Jingkui Qu
Summary: This research explored the purification and recovery of beryllium from a multi-component solution using a solvent extraction method. It was found that under optimal conditions, 98.66% of the beryllium could be extracted using naphthenic acid as the extractant. The study also developed a process flowsheet for the separation of beryllium from multiple impurities using naphthenic acid, which showed high efficiency and a favorable beryllium-aluminium separation effect.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yingwei Lv, Yubo Liu, Baozhong Ma, Chengyan Wang, Yongqiang Chen
Summary: This study focuses on the recovery of rubidium from high concentration impurity solution through solvent extraction, and further purification and refinement of rubidium salt products. The results show that rubidium can be completely extracted after four-stage countercurrent extraction, accompanied by 18.84% of potassium entering the organic phase. By further scrubbing and HCl stripping, high-purity rubidium chloride and rubidium carbonate products can be obtained.
Article
Energy & Fuels
Olakunle R. Ogunsakin, Stefan Holberg, Xinyan Wang, Alexander Goroncy, Jeramie Adams, Patrick Johnson
Summary: The demineralization of coal by hydrochloric acid treatment can significantly increase the extraction yield of subbituminous coal, without affecting the coal's composition and structure.
Article
Chemistry, Applied
S. Melendi-Espina, R. Alvarez, M. A. Diez, M. D. Casal
FUEL PROCESSING TECHNOLOGY
(2015)
Article
Chemistry, Applied
M. F. Vega, A. M. Fernandez, E. Diaz-Faes, M. D. Casal, C. Barriocanal
FUEL PROCESSING TECHNOLOGY
(2017)
Article
Chemistry, Analytical
L. Florentino-Madiedo, D. Casal, E. Diaz-Foes, C. Barriocanal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2017)
Article
Energy & Fuels
M. D. Casal, M. F. Vega, E. Diaz-Faes, C. Barriocanal
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Agricultural Engineering
M. V. Gil, P. Oulego, M. D. Casal, C. Pevida, J. J. Pis, F. Rubiera
BIORESOURCE TECHNOLOGY
(2010)
Article
Agricultural Engineering
M. V. Gil, D. Casal, C. Pevida, J. J. Pis, F. Rubiera
BIORESOURCE TECHNOLOGY
(2010)
Article
Thermodynamics
M. D. Casal, M. V. Gil, C. Pevida, F. Rubiera, J. J. Pis
Article
Energy & Fuels
M. G. Plaza, C. Pevida, B. Arias, J. Fermoso, M. D. Casal, C. F. Martin, F. Rubiera, J. J. Pis
Article
Chemistry, Applied
A. G. Borrego, E. Osorio, M. D. Casal, A. C. F. Vilela
FUEL PROCESSING TECHNOLOGY
(2008)
Article
Energy & Fuels
M. D. Casal, M. A. Diez, R. Alvarez, C. Barriocanal
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2008)
Article
Chemistry, Analytical
C. Barriocanal, M. A. Diez, R. Alvarez, M. D. Casal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2009)
Article
Engineering, Environmental
M. G. Plaza, C. Pevida, B. Arias, M. D. Casal, C. F. Martin, J. Fermoso, F. Rubiera, J. J. Pis
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2009)
Article
Chemistry, Physical
M. D. Casal, Gregorio Marban
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
(2020)
Article
Chemistry, Physical
Samantha L. Flores-Lopez, Luis A. Ramirez-Montoya, M. Dolores Casal, Miguel A. Montes-Moran, J. Angel Menendez, Ana Arenillas
Summary: Extensive studies have been conducted on the correlation between synthesis variables and the final properties of resorcinol-formaldehyde carbon gels. Different combinations of synthesis variables can lead to carbon gels with similar pore sizes and porosity, but their behaviors in applications may vary. The distribution and connectivity of polymeric clusters are strongly influenced by factors such as water and methanol content in the precursor solution, affecting pore tortuosity and material permeability. Increasing water content or using a suitable combination of methanol content and precursor solution pH during the polymerization process can result in less tortuous pore structures in carbon gels with the same porosity.
Article
Chemistry, Physical
Maria Dolores Casal, Noel Diez, Sara Paya, Marta Sevilla
Summary: S-doped carbon sheets were easily prepared from cork through ball-milling, achieving >14 wt % S doping using a cost-effective and environmentally benign S dopant. The synthesized materials provided high Na storage capacities and could handle large current densities. Highly porous carbon sheets with a BET surface area > 2700 m(2) g(-1) were also obtained through chemical activation, showing good anion storage capacities. Sodium-ion capacitors assembled with the optimized S-doped carbon sheets and highly porous carbon sheets exhibited excellent energy/power characteristics and cycling stability.
ACS APPLIED ENERGY MATERIALS
(2023)
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)
