Article
Chemistry, Applied
Xusheng Zhang, Xiaodong Tian, Yan Song, Jinru Wu, Tao Yang, Zhanjun Liu
Summary: This study prepared activated carbons (ACs) with unique structure using air pre-oxidation assisted KOH activation technology. The results showed that pre-oxidation promoted the development of pore and the regulation of surface chemical composition of the obtained ACs. The as-prepared AC-330 exhibited suitable oxygen functional groups, high specific surface area, high small-sized mesopore volume, and satisfactory specific capacity and capacity retention, as well as high energy-power density parameters.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Dongyang Zhu, Qianqian Yan, Yifan Zhu, Xinbo Tong, Alec Ajnsztajn, Muhammad M. Rahman, Pulickel M. Ajayan, Rafael Verduzco
Summary: This study demonstrates that the degree of pore collapse in nanoporous materials COFs can be precisely controlled by using a mixture of high and low surface tension solvents. The study also reveals that pore collapse is an irreversible process, and solvent surface tension is the most important characteristic that governs pore collapse.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Chao Li, Yuannian Li, Yuewen Shao, Lijun Zhang, Shu Zhang, Shuang Wang, Bin Li, Zhenhua Cui, Yonggui Tang, Xun Hu
Summary: In the chemical activation of biomass, directly mixing an activating agent and feedstock leads to poor activation efficiency. This study proposed the use of volatilized KOH to activate biomass by placing them in separate beds. The results showed that this method resulted in higher yield and better quality of activated carbon compared to direct activation. It also reduced environmental impact and improved material efficiency.
Article
Multidisciplinary Sciences
A. A. Adeleke, J. K. Odusote, P. P. Ikubanni, A. S. Olabisi, P. Nzerem
Summary: This study focuses on the physicomechanical durability and energy content of briquettes made from subbituminous coal and torrefied biomass using bentonite as a binder. The density of the briquettes increased with an increase in bentonite content, while the water resistance decreased. The briquettes made with 2% bentonite content exhibited better physicomechanical durability with equivalent energy content.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Long Gao, Yonggang Wang, Yiting Zhao, Jingdong Yang, Haiyong Zhang, Xiongchao Lin
Summary: This study investigates the effect of n-heptane soluble (HS) content in refined coal tar pitch (RCTP) on the preparation of needle coke (NC). The results show that with the decrease of HS content, the aromaticity of RCTPs increases, and the amount and length of branched chains decrease. The quality differences in NCs are attributed to different types and orientations of mesophase structures formed by RCTPs with different HS content. The study suggests that the HS content should be controlled not less than 15.9% when preparing RCTP by the solvent method.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Applied
Anna A. Kudinova, Maria E. Poltoratckaya, Renat R. Gabdulkhakov, Tatiana E. Litvinova, Viacheslav A. Rudko
Summary: Low-quality sulfur petroleum coke can be activated to obtain highly porous carbon material for various applications. By using a laboratory coking unit and chemical activation with KOH, the properties of the produced coke were studied. It was found that using coke from vacuum residue as a carbon feedstock resulted in the highest surface area and porosity.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Chemistry, Physical
Zhao Jin, Zhengwei Cui, Xiangyi Long, Marcos Millan, Guanming Yuan, Zhijun Dong, Ye Cong, Jiang Zhang, Yanjun Li, Xuanke Li
Summary: The macroscopic and microscopic structures of pitch-derived cokes can be controlled by adjusting the synthetic precursors, impacting the electrochemical performance in lithium-ion batteries. Introduction of C9 resin leads to a shift in the microstructure of resulting PCs from oriented lamellar texture to fine-grained mosaic texture.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Jong Hoon Cho, Byong Chol Bai
Summary: The study demonstrated that the use of pressurized coking process can increase yield through the involvement of low-boiling point materials in polymerization reaction while maintaining properties such as conductivity and density of the prepared coke and graphite.
Article
Energy & Fuels
Lin Wang, Yongbin Yang, Yang Ou, Peiyao Tang, Chen Liu, Xiaoxuan Zhang, Qiang Zhong, Qian Li, Tao Jiang
Summary: In this study, coke breeze was used as a solid waste fuel and recycled with coal tar pitch as the binder to produce metallurgical coke substitute. The activation of trimethylbenzene on the binding properties of coal tar pitch was investigated, and its addition improved the compressive strength and density of the formed coke products. The results met the Chinese secondary metallurgical coke standard.
Article
Energy & Fuels
Zhao He, Jinliang Song, Zheng Wang, Xiaohui Guo, Zhanjun Liu, T. James Marrow
Summary: Two kinds of microcrystalline graphite based UGIG were prepared and compared with pitch coke based UGIG. The microcrystalline graphite based UGIG exhibited superior structure and property advantages, making it suitable for molten salt applications.
Article
Chemistry, Multidisciplinary
Jie Lei, Jing Liu, Ningning Tang, Haibo Han, Zhi Li, Kang Li, Teng Zhai, Hui Chen, Hui Xia
Summary: This study demonstrates for the first time the gram-scale synthesis of carbon nano-onions with outstanding microporous structure and specific capacitance, providing a practical pathway for commercial applications.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Energy & Fuels
Yuzhu Zhang, Xiang Liu, Shihao Gu, Lidong Yan, Yaming Zhu, Chaoshuai Hu, Xitao Yin, Xuefei Zhao
Summary: Through the co-carbonization of coal liquefaction pitch (CLP) and refined soft pitch, high-quality needle coke has been successfully synthesized. Blending CLP and refined soft pitch allows for the adjustment of the thermal stability of the pitch mixture, and co-carbonization is an effective technique for preparing high-quality needle coke.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Environmental Sciences
Brett J. Valentine, John H. Krahling, Stephen D. Mueller
Summary: This study quantifies the amount of coal and carbonaceous combustion by-products in sediments from the Kinnickinnic River using organic petrology techniques. Contaminants like PAHs are known to readily adsorb to coal and combustion byproducts, presenting concerns. Overall, the modified ASTM method provided a means to quantify the abundance of carbonaceous material present in the sediments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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
Multidisciplinary Sciences
Oliver K. L. Strong, Elmira Nazari, Tyler Roy, Kevin Scotland, Paul R. Pede, Andrew J. Vreugdenhil
Summary: Activation of petroleum coke with KOH results in high surface area materials that are predominantly microporous, limiting their adsorption kinetics. Additional heat cycles were applied to oxidize residual potassium metal from initial activation, resulting in an increase in mesoporosity and improved adsorption kinetics.
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)
