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Top 10 Influential Events in carbon neutrality and climate change response for 2023

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Frontiers in Energy 2024年第1期18卷 1-3页

作者： Research Institute of Carbon Neutrality of Shanghai Jiao Tong University Research Institute of Carbon Neutrality Shanghai Jiao Tong UniversityShanghai 200240China

In 2023, the global community intensified its efforts towards achieving carbon neutrality and addressing climate change, witnessing several impactful events. Research Institute of Carbon Neutrality, Shanghai Jiao Tong University compiled the Top 10 Events (in chronological order) in the field of global carbon neutrality and climate change response for 2023, to share with readers these significant moments that document the ongoing ambition and collective efforts of human society.

关键词： neutral collective intensified

Achieving simultaneously high conversion and high selectivity for light olefins directly producing from syngas

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Science China Chemistry 2024年第3期67卷 753-754页

作者： Yuhan Sun Shanxi research institute Huairou Research LaboratoryTaiyuan 030032China institute of carbon neutrality ShanghaiTech UniversityShanghai 201210China

关键词： selectivity simultaneous catalysis

Achieving simultaneously high conversion and high selectivity for light olefins directly producing from syngas

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Science China Chemistry 2023年

作者： Yuhan Sun Shanxi research institute Huairou Research Laboratory institute of carbon neutrality ShanghaiTech University

The activity and selectivity are two primary indexes of a successful catalyst for chemical reactions. However,achieving a high activity and a high selectivity simultaneously is a long-standing challenge in catalysis, the socalled activity–selectivity trade-off. In the article recently published in Science, a research team led by Prof. Xiulian Pan and Prof. Xinhe Bao, from the Dalian institute of Chemical Physics (DICP) of the Chinese Academy of Sciences(CAS), has demonstrated how this is achieved in the direct conversion of syngas into light olefins by using Ge-substituted AlPO-18 (GeAPO-18) in combination with ZnCrOx as a novel bifunctional catalyst [1].

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research on cooling-temperature control strategy of fuel-cell engine test bench

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Clean Energy 2023年第1期7卷 42-52页

作者： Chang Du Tiancai Ma Weikang Lin Kaihang Song Yonghao Liang School of Automotive Studies Tongji UniversityShanghai201804PR China institute of carbon neutrality Tongji UniversityShanghai200092PR China

As one of the important ways to utilize hydrogen energy,fuel cells are receiving more and more attention and research from countries and institutions.To meet the practical needs of testing the performance of high-power fuel-cell systems and simulate the actual application environment as much as possible,a fuel-cell system test bench is usually used to test the system performance,in which the cooling-temperature control of the test bench has a great impact on the results of the performance of the fuel-cell system.This paper studies the cooling-temperature control strategy of a 150-kW-class fuel-cell engine test platform,proposes a new test-bench cooling-system structure with a thermostat and heat exchanger as the main heat-dissipation components,and compares and analyzes the impact of coordinated thermostat and heat-exchanger control on the fuel-cell system test performance.The test results show that the control strategy of the coordinated operation of a thermostat and heat exchanger can maintain the steady-state error to within±0.3℃and maintain the temperature variation to within±1.5℃during the loading-condition test,so as to avoid the limitation of system output performance due to excessive cooling-temperature fluctuation and ensure that the fuel-cell engine performance-test process is carried out smoothly and efficiently.

关键词： fuel-cell engine test bench cooling-temperature control strategy thermostat heat exchanger

氟化高浓电解液实现无水氟化铜正极的可逆循环

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中国科学:材料科学(英文版) 2023年第8期66卷 3039-3045页

作者：戴一铭刘旭阳伍旺炎黄瑛王腾锐宋振友张任远罗巍 institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804China institute of carbon neutrality Tongji UniversityShanghai 200092China

无水氟化铜(CuF_(2))有望成为下一代锂电池正极材料,其高比容量(528 mA h g^(−1))和高工作电压(3.55 V vs.Li/Li^(+))使得其能量密度高达1874 W h kg^(−1).然而,由于充电时铜的溶解,CuF_(2)正极容易失活,这限制了其发展.本研究采用氟化... 详细信息

无水氟化铜(CuF_(2))有望成为下一代锂电池正极材料,其高比容量(528 mA h g^(−1))和高工作电压(3.55 V vs.Li/Li^(+))使得其能量密度高达1874 W h kg^(−1).然而,由于充电时铜的溶解,CuF_(2)正极容易失活,这限制了其发展.本研究采用氟化高浓电解液抑制铜的溶解,从而实现了CuF_(2)正极的可逆循环.采用氟化高浓电解液后,CuF_(2)正极的容量在30次循环后仍保有228 mA h g^(−1),是使用传统碳酸酯类电解液的电池容量的近三倍.综上,本研究提出了一种电解质工程策略,可以实现CuF_(2)正极的可逆充放电.

关键词：锂电池正极材料电池容量可逆循环电解液高比容量能量密度工作电压碳酸酯

Green Technology Innovation under China's New Development Concept:The Effects of Policy-Push and Demand-Pull on Renewable Energy Innovation

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Social Sciences in China 2023年第1期44卷 158-180页

作者： Huang Yanghua 崔静波 Lin Shen School of Applied Economics and institute for carbon Peak and carbon neutrality Renmin University of China Division of Social Sciences and Environmental research Center Duke Kunshan University institute of World Economics and Politics and National institute for Global Strategy Chinese Academy of Social Sciences

Green technology innovation meets the dual expectation of innovative development and green development perspectives.Under the canonical demand-pull and policy-push theories,a long-term mechanism for green technology innovation could be formed through upstream policy push and downstream demand-pull.Leveraging China's regional carbon emission trading scheme pilots as a quasi-natural experiment,this paper examines the policy-push and demand-pull effects on innovation in renewable energy patents.The data pertain to the city-level renewable energy patents from 2000 to 2020.Based upon the triple difference-in-difference method,results suggest that both policy-push and demandpull factors exert positive effects on innovation.This paper further explores the practical and theoretical implications of green technology innovation under the new development perspective.

关键词： new development perspective green technology innovation demand pull policy push carbon emission trading

Observations of Dynamic Turbulence in the Lower Stratosphere over Inner Mongolia Using a High-resolution Balloon Sensor Constant Temperature Anemometer

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Advances in Atmospheric Sciences 2022年第3期39卷 519-528页

作者： Xiaoyu REN Yi LIU Zhaonan CAI Yuli ZHANG carbon neutrality research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China University of Chinese Academy of Sciences Beijing 100049China

We present characterizations of the dynamic turbulence in the lower stratosphere measured by a new balloon-based system designed for detecting finer scale dynamic turbulence. The balloon-based system included a constant temperature anemometer(CTA) operating at a sampling rate of 2 k Hz at an ascent speed of 5 m s^(-1)(corresponding to a vertical resolution of 2.5 mm), an industrial personal computer, batteries, sensors for ambient temperature and humidity, an A/D converter, and others. The system was successfully launched to 24 km altitude over Bayannur City, Inner Mongolia Province. Results show the spatial intermittence of the turbulence layers, with clear boundaries between turbulent and nonturbulent regions. This is the first time that the dynamic turbulence spectrum down to the viscous sub-range has been obtained throughout the lower stratosphere over China. With that, the energy dissipation rates of dynamic turbulence could be calculated with high precision. The profile of the dissipation rates varied from 7.37 × 10^(-7) to 4.23 W kg^(-1) and increased with altitude in the stratosphere.

关键词： dynamic turbulence stratosphere balloon payload high spatial resolution dissipation rates Inner Mongolia

Effect of deformation parameters on the austenite dynamic recrystallization behavior of a eutectoid pearlite rail steel

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 833-841页

作者： Haibo Feng Shaohua Li Kexiao Wang Junheng Gao Shuize Wang Haitao Zhao Zhenyu Han Yong Deng Yuhe Huang Xinping Ma institute for carbon neutrality University of Science and Technology BeijingBeijing 100083China institute for Steel Sustainable Technology Liaoning Academy of MaterialsShenyang 110004China Pangang Group Panzhihua Iron and Steel research institute Co.Ltd. Panzhihua 617000China

Understandings of the effect of hot deformation parameters close to the practical production line on grain refinement are crucial for enhancing both the strength and toughness of future rail steels.In this work,the austenite dynamic recrystallization(DRX)behaviors of a eutectoid pearlite rail steel were studied using a thermo-mechanical simulator with hot deformation parameters frequently employed in rail production lines.The single-pass hot deformation results reveal that the prior austenite grain sizes(PAGSs)for samples with different deformation reductions decrease initially with an increase in deformation temperature.However,once the deformation temperature is beyond a certain threshold,the PAGSs start to increase.It can be attributed to the rise in DRX volume fraction and the increase of DRX grain with deformation temperature,respectively.Three-pass hot deformation results show that the accumulated strain generated in the first and second deformation passes can increase the extent of DRX.In the case of complete DRX,PAGS is predominantly determined by the deformation temperature of the final pass.It suggests a strategic approach during industrial production where part of the deformation reduction in low temperature range can be shifted to the medium temperature range to release rolling mill loads.

关键词： eutectoid pearlite rail steel prior austenite grain size dynamic recrystallization single-pass hot deformation three-pass hot deformation

大气CO_(2)观测支持核校我国2018~2021年人为碳排放与陆地碳交换

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Science Bulletin 2023年第20期68卷 2467-2476,M0006页

作者：仲峻霆张小曳郭立峰王德英苗长虹张希良 Monitoring and Assessment Center for Greenhouse Gases and carbon neutrality Key Laboratory of Atmospheric Chemistry of China Meteorological AdministrationChinese Academy of Meteorological SciencesBeijing 100081China Laboratory of Climate Change Mitigation and carbon neutrality Henan UniversityZhengzhou 450001China institute of Energy Environment and EconomyTsinghua UniversityBeijing 100084China

准确估算人为碳排放和自然碳交换对我国实现碳中和目标至关重要.当前自下而上的排放清单在区域尺度上存在不确定性,且缺乏大气观测的独立验证.本文利用我国39个高精度CO_(2)地基观测站,自上而下反演获得45 km×45 km分辨率的人为碳排放... 详细信息

准确估算人为碳排放和自然碳交换对我国实现碳中和目标至关重要.当前自下而上的排放清单在区域尺度上存在不确定性,且缺乏大气观测的独立验证.本文利用我国39个高精度CO_(2)地基观测站,自上而下反演获得45 km×45 km分辨率的人为碳排放与自然碳交换,实现了对排放清单的核校支持.结果表明,2018~2021年反演获得的我国年均人为碳排放总量约为125亿吨CO_(2),高于自下而上的五套排放清单约15%.扣除人和动物呼吸排放后,2018~2021年我国年均人为碳排放约为115亿吨CO_(2).从逐年变化看,2021年我国人为二氧化碳排放总量较前一年增加4%,高于2020年同比增速(1.1%),略高于2019年同比年增速(3.7%),与我国观测到的大气中的CO_(2)年增量趋势一致.扣除农田碳汇、非CO_(2)碳排放、水蚀及火点排放后,2018-2021年我国年均陆地生态系统碳汇约为21亿吨CO_(2),高于大多数全球反演模式,占同期人为碳排放约17%.陆地生态系统自然碳交换受气候变化年际波动影响较大,其中2019年受弱厄尔尼诺事件影响,碳汇同比降幅最大,2020年碳汇有所增加,2021年同比2020年增加13.7%.自上而下反演给出了大气观测视角下CO_(2)源汇时空变化,并重点突出了不同省份在实现碳中和目标时面临的挑战.

关键词：碳排放碳中和排放清单碳交换自上而下气候变化独立验证不确定性