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
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, Analytical
Xian Xu, Louwei Cui, Junhe Shi, Jiaojiao Liu, Yonghong Zhu, Yafei Tian, Mingming Ma, Tao Liu, Huaan Zheng, Dong Li
Summary: This study prepared needle coke by co-carbonization of medium and low temperature coal tar refined pitch (RCTP) and high temperature coal tar refined pitch (RHCTP). The effect of co-carbonization of blended refined pitches with different proportions on the structure and properties of needle coke was investigated. It was found that adding RHCTP to RCTP increased the content of aromatic hydrocarbons and reduced the content of heterocyclic compounds, which promoted the evolution and growth of carbonaceous structures. As the ratio of RHCTP in RCTP increased, the needle coke exhibited more fibrous structures, with decreased defects in graphite crystals and increased graphitization.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
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
Zhichen Zhang, Bin Lou, Ning Zhao, Enqiang Yu, Zenghao Wang, Hui Du, Zhaojun Chen, Dong Liu
Summary: The study focused on the production of needle coke using low temperature coal tar (LCT) and heavy oil (HO) through liquid phase carbonization. It found that LCT played a key role in improving material compatibility and reducing structural separation during co-carbonization.
Article
Chemistry, Multidisciplinary
Jung-Chul An, Seong-Young Lee, Joo-Il Park, Manyoul Ha, Joongpyo Shim, Ikpyo Hong
Summary: Various fractionalized solvents with different paraffinicities were used to maximize the efficiency of the QI extraction process for coal tar pitch, with highly pressurized and elevated temperature conditions to accelerate reaction kinetics. The purified coal tar pitch with low QI content was processed into anisotropic coke, showing unique morphological features under a polarized light microscope. The additives and reaction conditions used in this study were found effective and feasible for preliminary processing in needle coke production.
APPLIED SCIENCES-BASEL
(2021)
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
Zhichen Zhang, Kun Chen, Dong Liu, Bin Lou, Min Li, Shuhai Guo, Ran Yu, Bo Wu, Xin Gong, Gang Li
Summary: The study compared needle coke prepared from petroleum feedstock HCTO and coal feedstock LCT, revealing the effects of colloids and phenolic compounds in LCT3 on the carbonaceous structure evolution. Additionally, the calcination process was found to exacerbate structural defects and strains in the pyrolysis products.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Energy & Fuels
Mengyao Qi, Sheng Huang, Shiyong Wu, Youqing Wu, Yonghui Bai, Jinsheng Gao
Summary: In this study, mesophase pitches were prepared by segmental hydrogenation/thermal condensation method using Shenhua coal liquefaction residue refined pitch (CLP) as raw material, and the effects of THN addition and hydrogenation temperature on the structure and properties of the resulting products were investigated. The results showed that THN addition and higher hydrogenation temperature could increase the mesophase content and improve its optical texture. The analysis of hydrogenated pitch structures revealed that THN addition increased the alkyl group content and resulted in more alpha-structures.
Article
Materials Science, Multidisciplinary
Yucheng Tian, Ye Huang, Xinli Yu, Feng Gao, Shenghui Gao, Feili Wang, Dong Li, Xian Xu, Louwei Cui, Xiaoyong Fan, Huan Dong, Jie Liu
Summary: A better mesophase pitch precursor for green needle coke is obtained through a new process, with carbonization temperature and time playing a crucial role in its structure and properties, while aliphatic side chain substitution is beneficial for ordered accumulation, resulting in higher quality green needle coke.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Energy & Fuels
Zhichen Zhang, Xiaoqiao Huang, Lanjie Zhang, Shuhai Guo, Hui Du, Zhaojun Chen, Bo Wu, Gang Li, Dong Liu
Summary: In the process of preparing needle coke from low-temperature coal tar through carbonization, the transformation between COO- and C-O functional groups under the influence of aromatics and high aromaticity materials has been found, leading to a more ordered carbonaceous structure.
Article
Energy & Fuels
Peng Wu, Chun-Ru Zhou, Xin-Yuan Xu, Zhi-Bo Zhang, Tian-Yu Han, Chu-An Xiong
Summary: This paper presents a low-temperature solvothermal method for obtaining carbon mesophase materials using high-temperature coal tar as the raw material and ethanol as the solvent. The method reduces the required temperature from 410 to 230°C and simplifies the process of preparing pitch. The resulting CMs demonstrate impressive adsorption and electrochemical properties, making them highly suitable for a wide range of applications.
Article
Energy & Fuels
Zhichen Zhang, Zenghao Wang, Lanjie Zhang, Junjie Cui, Shuhai Guo, Honghai Ji, Yanjun Liu, Guoli Zhao, Wei Zhu, Chong Jiao, Yonggang Cao, Dong Liu
Summary: In the needle coke industry, the utilization of raffinate oil from raw material refining has been improved through co-carbonization to enhance the structural evolution of aromatic feedstock. By investigating the carbonization behavior and structural evolution of blended materials, this study optimized the industrial structure of needle coke preparation process, resulting in increased yield and quality of derived products.
Article
Energy & Fuels
M. Wojtaszek, R. Wasielewski
Summary: The study demonstrates that adding waste ion exchange resins to coke can improve its mechanical strength, but may have adverse effects on quality parameters such as sulfur content and abrasion. Furthermore, chars created from WIER in the coke matrix are more reactive than coke matter originated from coal.
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
Oncology
Xuefei Zhao, Xia Xia, Xinyue Wang, Mingze Bai, Dongdong Zhan, Kunxian Shu
Summary: This study established proteomic subtypes of gastric cancer and identified significant survival rate differences between two subtypes (S-I and S-II). It showed that S-I subtype is sensitive to chemotherapy and patients benefit from adjuvant chemotherapy. These findings were validated in an independent set, demonstrating the utility and potential of the deep learning-based workflow in prognosis prediction and therapeutic decision-making.
FRONTIERS IN ONCOLOGY
(2022)
Article
Physiology
Yu Zhang, Xuefei Zhao, Xin Man, Yue Ma, Wei Zhang, Yu Wang, Xing Lei, Suying Bai
Summary: The research found that muscone in muskrat musk can regulate the development of muskrat prostate by inhibiting apoptosis.
AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY
(2022)
Article
Engineering, Chemical
Chunyang Zhang, Yilin Fang, Yaming Zhu, Hongyu Chu, Chaoshuai Hu, Yunliang Xu, Xuefei Zhao, Yonghui Bai
Summary: Coal pitch is an important raw material for producing artificial carbon/graphite materials. Its pyrolytic behavior plays a crucial role in determining the quality of the derived materials. The molecular structure and aromaticity of coal pitch significantly affect the carbon crystalline content, micro-strength, and resistance of the pyrolytic products.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Biomedical
Qingsong Ai, Mengyuan Zhao, Kun Chen, Xuefei Zhao, Li Ma, Quan Liu
Summary: This paper presents an optimized neural network architecture for brain-computer interface technology. By removing artifact components, augmenting data, and using ensemble learning and transfer learning methods, the control of a robotic arm with multiple degrees of freedom is achieved. Experimental results demonstrate improved classification accuracy and model generality.
JOURNAL OF NEURAL ENGINEERING
(2022)
Article
Chemistry, Physical
Lidong Yan, Yilin Fang, Jianfeng Deng, Yaming Zhu, Yuzhu Zhang, Junxia Cheng, Xuefei Zhao
Summary: This study investigates the synthesis of MCMBs using high-temperature coal tar pitch and coal pyrolytic extracts. The addition of coal pyrolytic extracts can alter the molecular structure of the blending pitch, promoting the generation of MCMBs. The MCMBs obtained through co-polycondensation exhibit good sphericity, lower surface morphology defects, and lower charge transfer resistance.
Article
Chemistry, Applied
Fukuan Zhang, Xuefei Zhao, Jie Zhang, Lili Zhao, Lin Li, Jiayi Yang, Hao Li, Haiqing Luo
Summary: In this study, an electrochemically induced method for regio- and stereoselective (E)-beta-C(sp(2))-H trifluoromethylation of enamides was disclosed. The method features catalyst-free, simple setup, and broad substrate scopes, allowing for the synthesis of products with exclusive E-selective control under mild conditions.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
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
Integrative & Complementary Medicine
Xuefei Zhao, Jianjun He, Jue Liu
Summary: Positive psychological nursing combined with free posture can significantly improve the prognosis of primipara with singleton spontaneous delivery, by shortening labor stages, reducing pain, and improving delivery outcomes.
EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE
(2022)
Review
Chemistry, Physical
Jingying Shi, Xuefei Zhao, Can Li
Summary: Surface passivation engineering is a crucial approach to enhance the performance of photoelectrodes in photoelectrochemical (PEC) water splitting. This review summarizes various passivation materials and their preparation methods, characterizations by PEC measurements and related spectral technologies. The distinct features of the passivation effect, separate from other modifications such as cocatalyst decoration, are highlighted. Significant progress in combining surface passivation engineering with other interfacial modification strategies for the rational design of photoelectrodes is demonstrated. Ideas for future research on surface passivation modification to improve the performance of photoelectrodes are also proposed.
Review
Endocrinology & Metabolism
Cunqing Yang, Xuefei Zhao, Xuedong An, Yuehong Zhang, Wenjie Sun, Yuqing Zhang, Yingying Duan, Xiaomin Kang, Yuting Sun, Linlin Jiang, Fengmei Lian
Summary: Diabetic peripheral neuropathy is a chronic metabolic disease that seriously affects patients' quality of life and can lead to amputation and neuropathic pain. Current treatment options only address symptoms and do not reverse nerve damage. Understanding the underlying mechanisms is crucial for prevention and the development of new therapies.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Review
Endocrinology & Metabolism
Xuefei Zhao, Xuedong An, Cunqing Yang, Wenjie Sun, Hangyu Ji, Fengmei Lian
Summary: Insulin resistance (IR) is crucial in metabolism-related diseases and provides a basis for understanding chronic diseases. This study reviewed the causes, mechanisms, and treatments of IR. Various factors including genetics, obesity, and disease lead to abnormalities in the insulin signaling pathway and development of IR. Therapeutic strategies include exercise, dietary changes, chemotherapy, and traditional Chinese medicine treatments. Further research is needed to define biomarkers and explore targeted drug treatments for IR to improve patients' quality of life.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Shushuang Sun, Yaming Zhu, Zishuo Gu, Hongyu Chu, Chaoshuai Hu, Lijuan Gao, Xuefei Zhao
Summary: In this study, bamboo fiber activated carbon (BAC) with high specific surface area and pore volume was prepared through the optimized process using response surface method. Characterization methods were used to analyze the micro-structure of BAC, which showed that BAC maintained the original pores of the bamboo fiber. The adsorption capacity of BAC for crystal violet in simulated wastewater reached a removal rate of 99.96%, and the adsorption process conformed to the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. BAC has great application prospects in dye wastewater treatment.
Article
Chemistry, Multidisciplinary
Yuzhu Zhang, Xiang Liu, Miaomiao Tian, Yaming Zhu, Chaoshuai Hu, Xuefei Zhao
Summary: This study investigated the feasibility of producing high-quality needle coke from coal liquefaction pitch. The co-carbonization of coal liquefaction pitch and anthracene oil was found to be an essential method for controlling the microstructure and properties of the derived needle coke. The addition of anthracene oil was a suitable method for adjusting the properties of coal liquefaction pitch and producing high-quality needle coke.
Article
Spectroscopy
Fan Qing-jie, Song Yan, Lai Shi-quan, Yue Li, Zhu Ya-ming, Zhao Xue-fei
Summary: This paper investigates the structural changes of soft coal tar pitch (SCTP) at different carbonization temperatures using CarbX software and X-ray diffraction (XRD) data. The results provide valuable insights into the microstructure of SCTP and its potential for producing high-quality needle coke.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2022)
Article
Spectroscopy
Hu Chao-shuai, Xu Yun-liang, Chu Hong-yu, Cheng Jun-xia, Gao Li-juan, Zhu Ya-ming, Zhao Xue-fei
Summary: The regulation of molecular structure and thermal conversion behavior of coal tar pitch is essential for preparing high-quality carbon materials. This study investigated the relationship between pyrolysis behavior and molecular structure of coal tar pitch by extracting 8 kinds of extracts using different organic solvents. The infrared spectra analysis revealed that the extracts are complex compounds composed of condensed aromatic ring structures with aliphatic hydrocarbon side chains containing oxygen and nitrogen. The thermal weight loss behavior of the extracts was studied using thermogravimetric analysis, and the pyrolytic activation energies were calculated. The results showed that the pyrolytic activation energies are closely related to the structure and content of functional groups. The aromaticity index and degree of branching were found to be the main indicators determining the pyrolysis activation energy. The fitting relationship model between the pyrolytic activation energy and the infrared spectral structure indexes was established, providing a better understanding of coal tar pitch's pyrolysis.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2022)