检索结果-内蒙古大学图书馆

emission control status and future perspectives of diesel trucks in China

Journal of environmental Sciences 2025年第2期148卷 702-713页

作者： Shihai Zhang Mingliang Fu Hefeng Zhang Hang Yin Yan Ding State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental SciencesBeijing 100012China Vehicle Emission Control Center Chinese Research Academy of Environmental SciencesBeijing 100012China

Chinese diesel trucks are the main contributors to NOx and particulate matter(PM)vehicle *** increase in diesel trucks could aggravate air pollution and damage human *** Chinese government has recently implemented a series of emission control technologies andmeasures for air quality *** paper summarizes recent control technologies and measures for diesel truck emissions in China and introduces the comprehensive application of control technologies and measures in Beijing-Tianjin-Hebei and surrounding *** onlinemonitoring technology has been adopted according to the China VI standard for heavy-duty diesel trucks,and control measures such as transportation structure adjustment and heavy pollution enterprise classification control continue to support the battle action plan for pollution *** and suggestions are provided for promoting pollution control and supervision of diesel truck emissions:adhere to the concept of overall management and control,vigorously promote the application of systematic and technological means in emission monitoring,continuously facilitate cargo transportation structure adjustment and promote new energy freight *** paper aims to accelerate the implementation of control technologies and measures throughout *** is endeavouring to control diesel truck exhaust *** is willing to cooperate with the world to protect the global ecological environment.

关键词： Air quality Diesel truck emissions emission control technology control measures

来源：评论

学校读者我要写书评

暂无评论

Forest Mercury Deposition Observation in Chongqing: Evaluating Effectiveness of Mercury Pollution control over the Past Decade in Southwestern China

ACS ES&T Air

引用

ACS ES&T Air 2025年第2期2卷 286-294页

作者： Ziyi Zhan Dongwei Lv Huang Zhou Qingru Wu Yuying Cui Lei Duan State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University 100084 Beijing China School of the Environment Nanjing University 210023 Nanjing China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University 100084 Beijing China；State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University 100084 Beijing China

As the largest Hg reservoir in terrestrial ecosystems, forests provide valuable insights into atmospheric Hg levels through observations of mercury deposition. In this study, we conducted a one-year observation of Hg deposition, by both throughfall and litterfall, in a forest located in Chongqing, an industrial hub in southwestern China, in 2021. We compared the results with observations made at the same sampling site in 2010–2011. The results showed that there were significant decreases in both Hg concentrations (from 115 μg·kg–1to 80.2 μg·kg–1for litterfall and from 68.4 ng·L–1to 4.01 ± 2.09 ng·L–1for throughfall) and Hg deposition fluxes (from 89.8 μg·m–2·yr–1to 19.9 μg·m–2·yr–1for total deposition, decreasing by 77.8%) in the forest from 2010 to 2021. The decrease in deposition might result from the synergistic effect of reduction in both anthropogenic (inventory-listed or nonquantitative) and re-emission sources. Over the decade since the initiation of theMinamata Convention on Mercury, atmospheric Hg levels have decreased significantly, mainly due to the co-benefits of conventional air pollutant control, indicating the effectiveness of China’s Hg pollution control policies.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Reconstructing missing NOx emissions in heavy-duty diesel vehicle OBD data: A machine learning approach

引用

Journal of Hazardous Materials 2025年 494卷 138619页

作者： Cao, Zeping Wang, Yanan Zhao, Xiaoyang Yin, Jiawei Jia, Zhenyu Zhan, Yanjie Liu, Yan Zhang, Qijun Mao, Hongjun Tianjin Key Laboratory of Urban Transport Emission Research & State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and Engineering Nankai University Tianjin300071 China Tianjin Youmei Environment Technology Ltd Tianjin300380 China

On-Board Diagnostic (OBD) systems enable real-time monitoring of heavy-duty diesel vehicle operations and NOx emissions. However, existing OBD systems have inherent limitations, including systematic missing values. To address this issue, this study develops a data-driven approach. The method utilizes OBD-recorded upstream and downstream NOx emissions data to build machine learning models for reconstructing real-world OBD data. The modeling results indicate that machine learning models perform well in predicting upstream emissions, achieving an R² above 0.9 on the test set. However, its performance in predicting downstream emissions was highly variable, with R² ranging from 0.05 to 0.98, and showed a positive correlation with fuel-based emission factors. A case study was conducted on a selected vehicle. The total NOx emission associated with missing data for this specific vehicle was estimated at 15,741.3 g, whereas the recorded emission from available data was 6157.3 g. Missing data were then imputed for an additional 31 vehicles, revealing that normal emitters showed significantly higher emission associated with missing data. The proposed approach is highly compatible with existing big data platforms and can be easily extended to other vehicles. This will improve the platform's representation of real-world emission, enabling policymakers to implement more targeted pollution mitigation strategies. © 2025 Elsevier B.V.

关键词： emission control

来源：评论

学校读者我要写书评

暂无评论

High Abundance of Atmospheric Sulfonates Derived from Light-Duty Gasoline vehicles

ACS ES&T Air

引用

ACS ES&T Air 2025年第4期2卷 607-614页

作者： Shuang Chen Huixia Han Lihong Ren Yisheng Xu Libin Wu Yuanguan Gao Yuanbi Yi Xinping Yang Mingliang Fu Hang Yin Yan Ding Pingqing Fu State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China；School of Earth System Science Tianjin University Tianjin 300072 China School of Earth System Science Tianjin University Tianjin 300072 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China Department of Ocean Science and Center for Ocean Research in Hong Kong and Macau The Hong Kong University of Science and Technology Hong Kong SAR China State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences Beijing 100012 China

Particulate matter (PM) emissions from light-duty gasoline vehicles (LDGV) pose a threat to both air quality and human health. However, the molecular compositions and chemical properties of these complex mixtures are poorly understood. In this study, we performed a detailed characterization of exhaust PM from LDGV at various speed phases at the molecular level by employing ultra-high-resolution Fourier transform ion cyclotron resonance mass spectrometry. We found that with increasing speed, the number of organic compounds increased significantly, especially organic nitrogen-containing and sulfur-containing compounds. Moreover, the increase of speed leads to high temperature and high pressure in the cylinder, which in turn leads to a series of thermal cracking–polymerization–cyclization reactions, resulting in new particulate matter with more aromatic structures. In addition, considerable intermediate volatility organic compounds and semivolatile organic compounds were identified in the exhaust PM. Notably, we observed the presence of sulfonates in tailpipe particulate matter during low- or high-speed phases, which highlights a previously negligible source of organic sulfonates in the atmosphere.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Recent advances and perspectives towards emission inventories of mobile sources:Compilation approaches,data acquisition methods,and case studies

引用

Journal of environmental Sciences 2023年第1期123卷 460-475页

作者： Han Jiang Hefeng Zhang Mingliang Fu Zhihui Huang Hong Ni Hang Yin Yan Ding State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental SciencesBeijing 100012China Vehicle Emission Control Center of Ministry of Ecology and Environment Chinese Research Academy of Environmental SciencesBeijing 100012China

In recent years,great efforts have been devoted to reducing emissions from mobile sources with the dramatic growth of motor vehicle and nonroad mobile source *** of a mobile source emission inventory is conducive to the analysis of pollution emission characteristics and the formulation of emission reduction *** study summarizes the latest compilation approaches and data acquisition methods for mobile source emission *** motor vehicles,a high-resolution emission inventory can be developed based on a bottom-up approach with a refined traffic flow model and real-world speed-coupled emission *** top-down approach has advantages when dealing with macroscale vehicle emission estimation without substantial traffic flow *** nonroad mobile sources,nonroad machinery,inland river ships,locomotives,and civil aviation aircraft,a top-down approach based on fuel consumption or power is *** ocean-going ships,a bottom-up approach based on automatic identification system(AIS)data is *** typical cases are studied,including emission reduction potential,a cost-benefit model,and marine shipping emission *** and suggestions are given on future research directions for emission inventories for mobile sources:building localized emission models and factor databases,improving the dynamic updating capability of emission inventories,establishing a database of emission factors of unconventional pollutants and greenhouse gas from mobile sources,and establishing an urban high temporalspatial resolution volatile organic compound(VOC)evaporation emission inventory.

关键词： emission inventory Mobile source emission factor emission control policy

来源：评论

学校读者我要写书评

暂无评论

Towards rational design of Cu-SSZ-13 catalysts with less N₂O formation in NH₃-SCR reaction: The effect of Brønsted acid sites

引用

Journal of environmental Sciences (China) 2025年 157卷 546-557页

作者： Liu, Jianqi Du, Jinpeng Wang, Jingyi Han, Shichao Shan, Yulong Zhang, Yan Wu, Xuanhao Gao, Shan Yu, Yunbo Wu, Zhongbiao Shan, Wenpo He, Hong Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijing 100049 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research Station Institute of Urban Environment Chinese Academy of Sciences Ningbo 315800 China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China Department of Environmental Engineering Zhejiang University Hangzhou 310058 China Zhejiang Tianlan Environmental Protection Technology Co. Ltd. Hangzhou 311202 China

Ammonia Selective Catalytic Reduction (NHs-SCR) technology has been employed to eliminate NOx from diesel engine exhaust, with Cu-SSZ-13 serving as the commercial catalyst. The greenhouse gas N2O is produced as a bypr... 详细信息

Ammonia Selective Catalytic Reduction (NHs-SCR) technology has been employed to eliminate NO_x from diesel engine exhaust, with Cu-SSZ-13 serving as the commercial catalyst. The greenhouse gas N₂O is produced as a byproduct when using Cu-SSZ-13 as the NH₃-SCR catalyst. To achieve synergistic control of pollutants and greenhouse gases in diesel engine exhaust, rational design of Cu-SSZ-13 catalysts is required. In this study, the effect of Brønsted acid sites in Cu-SSZ-13 catalysts on the formation of N₂O was investigated. Mild thermal treatment was innovatively employed to prepare Cu-SSZ-13 catalysts with different amounts of Brønsted acid sites. EPR, H₂-TPR, NH₃-TPD, NMR were utilized to determine that the Brønsted acid sites were modified while the Cu species remained unchanged. Thereby an accurate assessment of the influence of Brønsted acid sites on N₂O formation could be achieved. Our results showed that Cu-SSZ-13 with more Brønsted acid sites produced less N₂O during the NH₃-SCR reaction. In the low-temperature region, the presence of framework acid sites facilitates the decomposition of the NH₄NO₃ assisted by NO to form N₂ and H₂O, reducing the formation of N₂O. In the high-temperature region, the Brønsted acid sites promote the decomposition of NH₂NO into N₂ and H₂O. Meanwhile, the N₂O-SCR reaction can also be promoted by Brønsted acid sites, thereby decreasing N₂O emissions. This study suggests that in the future design and synthesis of Cu-SSZ-13 zeolites, attention should be paid to creating more Brønsted acid sites in Cu-SSZ-13 to reduce N₂O emissions. © 2024

关键词： Brønsted acid sites Cu-SSZ-13 zeolite N2O emission control NH3-SCR NOx abatement

来源：评论

学校读者我要写书评

暂无评论

Evaluating the emission status of light-duty gasoline vehicles and motorcycles in Macao with real-world remote sensing measurement

引用

Journal of environmental Sciences 2014年第11期26卷 2240-2248页

作者： Yu Zhou Ye Wu Shaojun Zhang Lixin Fu Jiming Hao School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex

Roadside remote sensing measurement was used to explore the real-world emission status of light duty gasoline vehicles （LDGVs） and motorcycles in Macao. Both fuel-based and distance-based emission factors were derived using the mass balance method. The emission concentration profile of LDGVs illustrated the benefits of tightening emission standards at the source country or region of import. The distance-based emission factors for CO, HC and NOx of LDGVs registered before 2000 were 8.00, 1.04 and 1.36 g/km, respectively. The distance-based emission factors for CO, HC and NOx of LDGVs registered in or after 2000 were 1.16, 0.15 and 0.18 g/km, respectively. The fuel-based CO emission factors of light duty motorcycles （LDMCs） and heavy duty motorcycles （HDMCs） registered before 2000 were about 10 times higher than those of LDGVs of the same age group. As the emissions of LDGVs decreased more quickly after 2000, the gap widens for newer vehicles. The distance-based HC emission factors of LDMCs and HDMCs registered before 2000 were 4.81 and 2.91 g/km, respectively. The distance-based HC emission factors of LDMCs and HDMCs registered in or after 2000 were 3.52 and 0.93 g/km, respectively. The poor emission performance of motorcycles and their larger share in the traffic flow will cause them to be the major contributor to traffic CO and HC emissions. LDMCs, especially two-stroke models, should be the priority for vehicle emission control efforts in Macao.

关键词： emission Remote sensing Macao Motorcycle

来源：评论

学校读者我要写书评

暂无评论

Development of a Compact Mobile Fuel laboratory in China 35

Development of a Compact Mobile Fuel Laboratory in China

引用

第35届中国控制会议

作者： ZHANG Mi HU Jingnan BAO Xiaofeng ZHU Rencheng XIE Shuxia ZU Lei SUN Chuanyong LV Jiuzhi State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences

ISBN: (纸本)9781509009107

This study discusses development of a mobile fuel laboratory in China,which integrates sulfur content detection device,vapor pressure testing device and fast simulation equipment for detergency *** compact mobile fuel lab can test detergency and sulfur content of both gasoline and diesel,and volatilization characteristic of *** research shows that taking many efficient measures to control influence factors can ensure portable devices providing reliable testing *** main influence factors such as vehicle vibration,essential resource supply,operating conditions and data quality control have been studied in this *** a three dimension dynamic model,consisted of vehicle,absorber and devices,can confirm the influence of ***,the solution of the model is used for guiding the design and selection of vibration damping *** power supply approaches,including commercial,generator and uninterruptible power supply,can provide sufficient *** split-phase circuit,voltage regulator and filter device are set up for decrease electrical signal *** and air circulation are two important elements which should be strictly controlled;thus,automotive air-conditioning system and an additionally onboard roof type air condition work alternatively to keep ambient temperature stable,and gas concentration alarm unit interlocked together with ventilation system ensures the car in a safe gas concentration *** prove that optimized equipment has good repeatability of ***,pre-treatment and pre-assessment are effective processes for blind sample analysis.

关键词： mobile fuel laboratory fuel quality sulfur content detergency Reid vapor pressure(RVP)

来源：评论

学校读者我要写书评

暂无评论

Significant N-containing brown carbon emission from heavy-duty diesel vehicles revealed by the molecular and chromophore analysis using ultra-high resolution mass spectrometry

引用

npj Climate and Atmospheric Science 2025年第1期8卷 1-8页

作者： Xiao He Xuan Zheng Ting Chen Shuwen Guo Bin Jiang Xubing Cao Yuan Cheng Zhiyuan Li Yan Ding Shaojun Zhang Jingkun Jiang Shuxiao Wang Ye Wu College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry CAS Guangzhou 510640 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin 150090 China School of Public Health (Shenzhen) Sun Yat-sen University Guangzhou 510275 China State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences Beijing 100012 China Vehicle Emission Control Center Chinese Research Academy of Environmental Sciences Beijing 100012 China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing 100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China

Brown carbon (BrC) holds scientific significance by influencing radiative balance, cloud condensation dynamics, and regional air quality. This study demonstrated that heavy-duty diesel vehicles (HDDVs) emit substantially higher levels of light-absorbing carbonaceous aerosols under aggressive conditions, such as frequent acceleration and high-speed phases, by investigating the emission profiles, formula distribution, and chromophore characteristics under various driving conditions. A non-targeted analysis of BrC was performed using Fourier-transform ion cyclotron resonance mass spectrometry coupled with a soft electrospray ionization source. The light absorption properties were assessed and revealed significantly higher light absorption during frequent acceleration and high-speed phases compared to low-speed phases. Formula distribution analysis highlighted a substantial presence of nitrogen-containing species, constituting 53–65% of the identified peaks, with high O/N ratios (\(\ge\)3), double bond equivalent values (DBE > 10), and aromaticity equivalent (Xc\(\ge\)2.5), which indicated the substantial contribution of aromatic structures, condensed aromatics, and nitrooxy functionalities to BrC chromophores.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Ways to assess hydrogen production via life cycle analysis

引用

Science of the Total environment 2025年 977卷 179355页

作者： Chen, Yang Guo, Wenshan Ngo, Huu Hao Chen, Zhuo Wei, Chunhai Bui, Xuan Thanh Van Tung, Tra Zhang, Huiying Centre for Technology in Water and Wastewater School of Civil and Environmental Engineering University of Technology Sydney SydneyNSW2007 Australia College of Life Sciences Fujian Agriculture and Forestry University Fuzhou350002 China Environmental Simulation and Pollution Control State Key Joint Laboratory State Environmental Protection Key Laboratory of Microorganism Application and Risk Control School of Environment Tsinghua University Beijing100084 China School of Civil Engineering Guangzhou University Guangzhou510006 China Ho Chi Minh City700000 Viet Nam Institute of Applied Technology and Sustainable Development Nguyen Tat Thanh University Ho Chi Minh70000 Viet Nam

As global energy demand increases and reliance on fossil fuels becomes unsustainable, hydrogen presents a promising clean energy alternative due to its high energy density and potential for significant CO2 emission reductions. However, current hydrogen production methods largely depend on fossil fuels, contributing to considerable CO2 emissions and underscoring the need to transition to renewable energy sources and improved production technologies. Life Cycle Analysis (LCA) is essential for evaluating and optimizing hydrogen production by assessing environmental impacts such as Global Warming Potential (GWP), energy consumption, toxicity, and water usage. The key findings indicate that energy sources and feedstocks heavily influence the environmental impacts of hydrogen production. Hydrogen production from renewable energy sources, particularly wind, solar, and hydropower, demonstrates significantly lower environmental impacts than grid electricity and fossil fuel-based methods. Conversely, hydrogen production from grid electricity primarily derived from fossil fuels shows a high GWP. Furthermore, challenges related to data accuracy, economic analysis integration, and measuring mixed gases are discussed. Future research should focus on improving data accuracy, assessing the impact of technological advancements, and exploring new hydrogen production methods. Harmonizing assessment methodologies across different production pathways and standardizing functional units, such as "1 kg of hydrogen produced, " are critical for enabling transparent and consistent sustainability evaluations. Techniques such as stochastic modelling and Monte Carlo simulations can improve uncertainty management and enhance the reliability of LCA results. © 2025 The Authors

关键词： Clean energy

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：