Spatiotemporal Distributions Of Typical Contaminants From The In-Situ Pyrolysis Of Tar-Rich Coals,
2024
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an University of Science and Technology, Xi’an 710054, China
Spatiotemporal Distributions Of Typical Contaminants From The In-Situ Pyrolysis Of Tar-Rich Coals, Tian Hua, Zhang Ruolin, Wang Qianji, Wu Xiaoyu, Zhang Lei, Zhang Lingru, Fang Siyuan
Coal Geology & Exploration
Objective and Methods Under high temperatures, oil and gas produced from the in situ pyrolysis of tar-rich coals will migrate toward and accumulate in the overburden strata after passing through the fracture zones on the coal seam roof, causing potential contamination risks for the underground environment. To understand the release and distribution characteristics of typical contaminants generated from the underground pyrolysis of tar-rich coals, this study investigated the typical tar-rich coals from the Shenfu mining area of the Jurassic coalfield in northern Shaanxi Province. Based on data on the stratigraphic structures and lithology and using the self-developed equipment for similarity …
Downhole Heaters For In-Situ Pyrolysis Of Tar-Rich Coals：A Review And Prospects,
2024
Key Laboratory of Coal Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi’an 710021, China; Shaanxi Coal Geology Group Co., LTD., Xi’an 710021, China
Downhole Heaters For In-Situ Pyrolysis Of Tar-Rich Coals：A Review And Prospects, Wang Zhendong, Duan Zhonghui, Yang Fu, Ma Li
Coal Geology & Exploration
Significance China boasts abundant tar-rich coal resources, which prove to be potential coal-based oil and gas resources capable of ensuring China's energy security. Extracting hydrogen while preserving carbon through the in-situ pyrolysis of tar-rich coals has developed into a trend in the clean and low-carbon utilization of coal resources. Downhole heaters serve as critical equipment for the efficient in-situ pyrolysis of tar-rich coals. Advances Based on investigations and the systematic collection of relevant information and data, this study offers a brief introduction of the currently used methods for in-situ convection heating, focusing on the present situation of the research and …
Exploring The Pyrolysis Of Tar-Rich Coals Under The Catalysis Of Cerium-Modified Magnetic Core-Shell Hzsm-5,
2024
School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi’an 710021, China
Exploring The Pyrolysis Of Tar-Rich Coals Under The Catalysis Of Cerium-Modified Magnetic Core-Shell Hzsm-5, Zhou Anning, Zhang Zhi, Chen Yongan, Zhang Huaiqing, Bai Zhuangwei, Shi Zhiwei, He Xinfu
Coal Geology & Exploration
Objective Tar-rich coals are valuable resources integrating coal, tar, and gas properties. Catalytic pyrolysis serves as a significant approach for achieving green and low-carbon development of tar-rich coals. However, the research and development of efficient and recyclable catalysts for the pyrolysis of tar-rich coals remains highly challenging. Methods With HZSM-5@SiO2@MgFe2O4 (HSMF) as the raw material, this study prepared HZSM-5@SiO2@MgFe2O4 (mHSMF) with a hierarchical porous structure using the hydrothermal method and alkali modification, followed by the preparation of cerium-modified mHSMF (5-CeO2/mHSMF) using the precipitation method. Employing a fixed-bed reactor, …
Table Of Contents,
2024
China Coal Technology and Engineering Group (CCTEG)
Strategic Value And Scientific Exploration Of In-Situ Pyrolysis Of Tar-Rich Coals,
2024
Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an University of Science and Technology, Xi’an 710054, China; College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
Strategic Value And Scientific Exploration Of In-Situ Pyrolysis Of Tar-Rich Coals, Wang Shuangming, Shi Qingmin, Sun Qiang, Cui Shidong, Kou Bingyang, Qiao Junwei, Geng Jishi, Zhang Lei, Tian Hua, Jiang Pengfei, Cai Yue, Liu Lang
Coal Geology & Exploration
Background Given China's significant demand shortfall of oil and gas, numerous constraints on oil and gas supply, an arduous task of green and low-carbon energy transition of coals, tar-rich coals, a type of coal resource integrating the properties of coal, oil, and gas, have great potential for increasing the oil and gas supply of the country. Advances Despite the successful engineering test conducted in Yulin, Shaanxi Province, in-situ pyrolysis of tar-rich coals remains in its exploratory stage. This technology holds great strategic value in two aspects: (1) It enables reduced demand shortfall of oil and gas in China to enhance …
Numerical Simulations Of The Evolutionary Patterns Of Multi-Physical Fields During The In-Situ Pyrolysis Of Tar-Rich Coals,
2024
Shaanxi Coal Geology Group Co. Ltd., Xi’an 710021, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi’an 710021, China
Numerical Simulations Of The Evolutionary Patterns Of Multi-Physical Fields During The In-Situ Pyrolysis Of Tar-Rich Coals, Yang Fu, Cheng Xiangqiang, Li Mingjie, Wu Zhiqiang, Wei Jinjia, Cao Husheng
Coal Geology & Exploration
Objective The in-situ pyrolysis of tar-rich coals, an emerging technology for coal resource utilization characterized by cleanliness, high efficiency, and safety, is still in its initial development stage. This technology is greatly influenced by the evolutionary patterns of multi-physical fields and critical process parameters. Methods A numerical simulation model involving multi-physical fields was established by coupling fluid flow, heat transfer, and chemical reactions, and its reliability was verified by comparing the numerical simulation results with the pyrolysis experimental results of cylindrical coal samples. Based on the pilot test conditions, the impacts of permeability, heat-carrier flow rate, and fracture zone height …
Impacts Of The Caking Property Of Tar-Rich Coals On Their Pore Structure Evolution And Seepage During Pyrolysis,
2024
School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Impacts Of The Caking Property Of Tar-Rich Coals On Their Pore Structure Evolution And Seepage During Pyrolysis, Chang Zhibing, Wang Chuchu, Kuang Wenhao, Tang Ying, Wu Xiaodan, Liu Shuqin
Coal Geology & Exploration
Objective The in-situ pyrolysis of tar-rich coals stands as a technique whereby coal seams are heated underground to produce tar and gas products. During the in-situ pyrolysis, the injection of heating media and the production of tar and gas are affected by the pore structure and permeability of coal seams. Since pyrolysis of caking tar-rich coals is accompanied by the formation of colloids, the pore structure and permeability of caking tar-rich coals differ from those of non-caking tar-rich coals. Methods Caking tar-rich coals were pyrolyzed at 300, 400, 500, and 600 ℃. During the pyrolysis, the pore parameters of the …
Identification Of Tar-Rich Coal Based On The True Density And Natural Gamma Ray Response Of Coals,
2024
Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an University of Science and Technology, Xi’an 710054, China; College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
Identification Of Tar-Rich Coal Based On The True Density And Natural Gamma Ray Response Of Coals, Shi Qingmin, Geng Xuhu, Wang Shuangming, Cai Yue, Han Bo, Wang Shengquan, Zhang Zhehao, He Yufei
Coal Geology & Exploration
Objective Tar yield, derived from the Gray-King assay, serves as the sole metric for evaluating tar-rich coal. However, insufficient exploration data hinder its effective application in the fine-scale evaluation of extensive tar-rich coal. Methods Based on binary classification, this study proposed the optimal thresholds for tar-rich coal identification using true density (ρ) and natural gamma-ray (GR) log. Moreover, this study elucidated the intrinsic mechanisms behind the significant petrophysical parameter responses of tar-rich coal. Results and Conclusions Key findings are as follows: (1) Coals with various metamorphic grades differ in identification threshold. For instance, long-flame tar-rich coal, the optimal …
A Log-Based Method For Evaluating The Tar Yield Of Tar-Rich Coal,
2024
College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China; Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China
A Log-Based Method For Evaluating The Tar Yield Of Tar-Rich Coal, Tian Han, Li Ning, Wang Shuangming, Wu Hongliang, Feng Zhou, Wang Kewen, Wang Guiwen
Coal Geology & Exploration
Objective As a kind of coal-based oil and gas resource, tar-rich coal is significant for the supply of oil and gas resources, as well as the clean and efficient utilization of coals. Presently, the identification of tar-rich coals primarily depends on the Gray-King assay. In contrast, there is a lack of studies on the accurate identification and evaluation of tar-rich coal using geophysical methods. Methods This study investigated coals in the Jurassic Xishanyao and Badaowan Formations in Santanghu Basin, Xinjiang. Based on petrophysical experiments, as well as the typical log response characteristics of tar-rich coal, this study developed a new …
A Method For Predicting The Tar Yield Of Tar-Rich Coals Based On The Bp Neural Network Using Multiple Indicators Of Coal Petrography And Coal Quality,
2024
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China Shaanxi; Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an University of Science and Technology, Xi’an 710054, China; Geological Research Institute for Coal Green Mining, Xi’an University of Science and Technology, Xi’an 710054, China
A Method For Predicting The Tar Yield Of Tar-Rich Coals Based On The Bp Neural Network Using Multiple Indicators Of Coal Petrography And Coal Quality, Qiao Junwei, Wang Changjian, Zhao Hongchao, Shi Qingmin, Zhang Yu, Fan Qi, Wang Duo, Yuan Dandan
Coal Geology & Exploration
Objective Tar yield, the most important coal quality parameter for coal utilization through low-temperature pyrolysis, determines the clean utilization of tar-rich coals. However, various constraints result in limited test data on tar yield in the geological exploration stage of coals, substantially restricting the fine-scale assessment and efficient utilization of tar-rich coals. Methods To achieve more scientific and accurate fine-scale tar-rich coal assessments, this study examined 1073 sets of lithotype and coal quality data obtained previously from a Jurassic coalfield in northern Shaanxi. From these data, 141 sets with 20 lithotype and coal quality parameters regarding macerals, proximate analysis, ultimate analysis, …
Performance Of Carbon Foams Based On Heavy Tar Produced By Tar-Rich Coal Pyrolysis,
2024
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Shaanxi Coal Geology Group Co., Ltd., Xi’an 710021, China
Performance Of Carbon Foams Based On Heavy Tar Produced By Tar-Rich Coal Pyrolysis, Zhang Lei, Liu Chunjiang, Song Ruikang, Wang Qi, Chen Ya, Huang Pengcheng
Coal Geology & Exploration
Objective Preparing graphitized foam materials using heavy tar produced by the pyrolysis of tar-rich coals plays a significant role in the high-value utilization of tar-rich coal resources. Methods This study aims to prepare high-performance carbon foam materials by investigating the relationships between various reaction conditions and carbon foam performance. First, using mesophase asphalt prepared with heavy tar as the precursor, carbon foams were developed via the high-temperature self-foaming method. Then, the effects of different reaction temperatures, heating rates, and reaction pressures on the performance of coal tar-based carbon foams were examined. Finally, quadratic multinomial regression equations were established using Box-Behnken …
“Lucid Waters And Lush Mountains Are Invaluable Assets”: Pathways And Prospects For Ecological Gdp In The Yellow River Basin,
2024
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
“Lucid Waters And Lush Mountains Are Invaluable Assets”: Pathways And Prospects For Ecological Gdp In The Yellow River Basin, Guangqian Wang
Bulletin of Chinese Academy of Sciences (Chinese Version)
This study, following Xi Jinping’s ecological civilization philosophy and the two mountains concept, explores pathways for realizing ecological value and mechanisms for ecological GDP in the Yellow River Basin. The research demonstrates that the two mountains concept breaks through the limitations of traditional development paradigms, providing a foundational guide for ecological conservation and high-quality development in the Yellow River Basin. The research shows that constructing an ecological asset system and incorporating it into GDP accounting is the key to addressing the challenges of ecological value transformation. This requires adherence to the principles of “requisition-compensation balance” and “market-based transaction”, coupled with …
Theoretical Connotations And Chinese Practices Of Nature-Based Solutions,
2024
State Key Laboratory of Regional and Urban Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Theoretical Connotations And Chinese Practices Of Nature-Based Solutions, Bojie Fu, Jun Wang
Bulletin of Chinese Academy of Sciences (Chinese Version)
The global ecological environment is confronted with severe challenges such as intensified climate change, drastic reduction of biodiversity and land degradation, which seriously affect the sustainable development of human beings. These challenges promote profound reflection on the relationship between human beings and nature. Nature-based Solutions (NbS) has emerged as an innovative concept of global ecological governance thateffectively responds to societal challenges. Its development has gone through embryonic stage, developmental stage and comprehensive application stage. Multidisciplinary principles such as restoration ecology and landscape ecology constitute the theoretical foundation of NbS. China has effectively integrated the concept of NbS with the construction …
Scientific Understanding And Transformation Pathways For “Ice And Snow Are Also As Valuable As Gold And Silver”,
2024
Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
Scientific Understanding And Transformation Pathways For “Ice And Snow Are Also As Valuable As Gold And Silver”, Qi Feng, Shijin Wang, Rongfang Zhao, Bao Wang
Bulletin of Chinese Academy of Sciences (Chinese Version)
“Lucid waters and lush mountains are invaluable assets”, and “ice and snow are also as valuable as gold and silver”. Excellent ecology, ecological enrichment, and happy life are concrete manifestations of the Chinese-style modernization featuring harmonious coexistence between human beings and nature. Compared with lucid waters and lush mountains, ice and snow covered land is mostly concentrated in winter and spring, making it rather difficult to transform them into mountains of gold and silver. How to forge a pathway of high-quality development of the ice and snow economy to drive the revitalization of rural industries in winter and spring is …
Three-Stage Transformation And Practical Path Of “Lucid Waters And Lush Mountains Are Invaluable Assets” Concept,
2024
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
Three-Stage Transformation And Practical Path Of “Lucid Waters And Lush Mountains Are Invaluable Assets” Concept, Lei Shen, Chao Zhang, Shuai Zhong
Bulletin of Chinese Academy of Sciences (Chinese Version)
“Lucid waters and lush mountains are invaluable assets” concept (hereinafter referred to as two mountains concept) serves as the important component for China’s ecological civilization construction, breaking the dilemma of traditional development and environmental protection, and fostering the synergy between economy and ecology. Based on a framework integrating conceptual evolution, institutional construction, and practical implementation, this study examines the three stages: the awakening of paradigm and local breakthroughs during the ice-breaking period (2005–2012), system construction and national promotion in the establishment period (2013–2017), and value transformation and global contribution in the sublimation period (2018–present). The analysis reveals that the two …
Editorials,
2024
Chinese Academy of Sciences
Editorials
Bulletin of Chinese Academy of Sciences (Chinese Version)
No abstract provided.
Exploration And Practice Of Major Function Zoning Based On That “Lucid Waters And Lush Mountains Are Invaluable Assets,
2024
CAS Key Laboratory of Regional Sustainable Development Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China; Institutes of Science and Development, Chinese Academy of Sciences, Beijing 100190, China
Exploration And Practice Of Major Function Zoning Based On That “Lucid Waters And Lush Mountains Are Invaluable Assets, Jie Fan, Jian Gao
Bulletin of Chinese Academy of Sciences (Chinese Version)
President Xi Jinping’s thought of that “lucid waters and lush mountains are invaluable assets” has led China to modernize in a new form of ecological civilization, and it is also the general guideline for upgrading the major function zoning (MFZ) from planning to a national strategy and basic institution. Focusing on key ecological function zones of the MFZ, this study contends that the implementation of the MFZ strategy is a systematic exploration and innovative practice of the two mountains concept. It clarifies that the original intention of the MFZ is to protect lucid waters and lush mountains by combing through …
Practicing Concept Of “Lucid Waters And Lush Mountains Are Invaluable Assets” To Advance High-Quality Development Of Territorial Space,
2024
China Academy of Urban Planning & Design, Beijing 100037, China
Practicing Concept Of “Lucid Waters And Lush Mountains Are Invaluable Assets” To Advance High-Quality Development Of Territorial Space, Kai Wang
Bulletin of Chinese Academy of Sciences (Chinese Version)
The concept of “lucid waters and lush mountains are invaluable assets” (two mountains concept) constitutes an important component of Xi Jinping Thought on Ecological Civilization, providing the fundamental guidance for establishing China’s territorial space planning system and its associated technical framework. This study analyzes the specific manifestations and root causes of the periodic conflicts between urban development space and ecological space in China. It further examines the theoretical value and practical significance of the two mountains concept in fostering a harmonious coexistence between humanity and nature from the perspective of spatial planning. Currently, China is in a critical period for …
Empirical Study On “Lucid Waters And Lush Mountains Are Invaluable Assets” In Harmonious Development Of Human-Mountain Relationship In Southwest Mountainous Regions, China,
2024
Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; China-Pakistan Joint Research Center on Earth Sciences, CAS-HEC, Islamabad 45320, Pakistan
Empirical Study On “Lucid Waters And Lush Mountains Are Invaluable Assets” In Harmonious Development Of Human-Mountain Relationship In Southwest Mountainous Regions, China, Yiping Fang, Xinjun He, Xueyuan Huang
Bulletin of Chinese Academy of Sciences (Chinese Version)
As the country with the largest mountainous area in the world, China’s research on two mountains (“lucid waters and lush mountains are invaluable assets”) concept in mountainous sustainable development holds significant theoretical and practical implications for unleashing green productivity, fostering new quality productive forces, and advancing the modernization of harmonious coexistence between humans and mountains. This study employs emergy analysis and literature review to evaluate the value transformation efficiency of two mountains concept across 37 national two mountains practice bases in mountainous counties of Southwestern China. The results indicate that: (1) the transformation level is higher in urban core areas …
Strategic Insights For Developing Protected Areas System With National Parks As Mainstay In New Era: Marking 20 Years Of “Lucid Waters And Lush Mountains Are Invaluable Assets”,
2024
Institutes of Science and Development, Chinese Academy of Sciences, Beijing 100190, China; School of Public Policy and Management, University of Chinese Academy of Sciences, Beijing 100190, China; National Parks and Protected Areas Research Center, Institutes of Science and Development, Chinese Academy of Sciences, Beijing 100190, China
Strategic Insights For Developing Protected Areas System With National Parks As Mainstay In New Era: Marking 20 Years Of “Lucid Waters And Lush Mountains Are Invaluable Assets”, Baorong Huang, Xuetian Hu, Huizhi Zhang, Ling Tang, Zhi Wang, Zhi Zhang
Bulletin of Chinese Academy of Sciences (Chinese Version)
In the new era, the advancement of Chinese path to modernization places new demands on the development of a protected areas system with national parks as the mainstay. At the same time, as reform deepens, the system faces emerging challenges, including outdated conservation concepts, insufficient systemic integration, proliferation of management exclusions, and weak social functions, hindering the effective transformation of lucid waters and lush mountains into invaluable assets. This study recommends that, guided by the two mountains concept and aligned with the strategic goals of national modernization, China must comprehensively advance the construction and reform of the protected areas system …
