检索结果-内蒙古大学图书馆

Three ionic liquids as ‘‘smart’’ stabilizers for diethyl azodicarboxylate (DEAD)

Journal of Molecular Liquids 2023年第1期381卷

作者： Yu, Qian Yang, Li Liu, Shang-Hao Cao, Chen-Rui Laiwang, Bin Shu, Chi-Min State Key Laboratory of Explosive Science and Technology Beijing Institute of Technology Beijing100081 China Yunlin64002 Taiwan Graduate School of Engineering Science and Technology YunTech Yunlin 64002 Taiwan Department of Fire Science WuFeng University Chiayi Minxiong62153 Taiwan Department of Safety Health and Environmental Engineering Yunlin YunTech64002 Taiwan Center for Process Safety and Industrial Disaster Prevention Yunlin YunTech64002 Taiwan

As a homogeneous system consists of diethyl azodicarboxylate (DEAD) soluble in three ionic liquids (ILs), such as [BMIM][NTf2], [BMIM][BF4], [BMIM][PF6], the catalytic efficiency can be substantially improved. However, their compatibility and stability have not yet been understood. The present study combines Thermal Safety Software (TSS) with Semenov theory in an in-depth analysis of experiment data to elucidate the reaction mechanism of DEAD with solvents effect. The characteristic thermokinetic parameters of DEAD dissolved in these three ILs, which TSS simulated, were high and consistent with the experimental values. Evidence was presented which showed that the thermal decomposition reaction mechanisms were determined as N-order model when DEAD soluble in the three ILs, and the order of the compatibility was: [BMIM][NTf2] > [BMIM][BF4] > [BMIM][PF6]. In this paper, the simulated value of self-accelerating decomposition temperature (SADT) was 48 °C for DEAD soluble in [BMIM][PF6] with a certain proportion, compared with the SADT value 43 °C calculated by Semenov theory. The research presented here confirms that 43 °C is the upper limit standard for the storage and transportation of DEAD, which paves a new avenue to facilitate the industrial process application of DEAD. The study concludes that three ILs are the smart stabilizers for DEAD, ameliorating its catalytic efficiency and thermal stability and laying a foundation for the rational design of catalysts toward green chemistry. © 2023 Elsevier B.V.

关键词： Sustainable chemistry

来源：评论

学校读者我要写书评

暂无评论

The Role of Light Wavelengths in Regulating Algal-Bacterial Granules Formation, Protein and Lipid Accumulation, and Microbial Functions

SSRN

引用

SSRN 2023年

作者： Liu, Wenhao Ji, Yuan Long, Yuhan Huang, Weiwei Zhang, Chuanbing Wang, Huifang Xu, Yahui Lei, Zhongfang Huang, Wenli Liu, Dongfang Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution College of Environmental Science and Engineering Nankai University Tianjin300350 China Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province Hainan University Renmin Road Haikou570228 China Huaxia Besince Environmental Technology Co. Ltd. Henan Zhengzhou450000 China Graduate School of Life and Environmental Sciences University of Tsukuba 1-1-1 Tennodai Ibaraki Tsukuba305-8572 Japan

This study explored the role of light wavelengths in regulating granules formation, protein and lipid production, and microbial functions. Bacterial granular sludge (BGS, R0) was most conducive to forming algal-bacterial granules sludge under blue (R2) light with highest chlorophyll a (10.2 mg/g-VSS) and diameter (1.8 mm), followed by red (R1) and white (R3) lights. R0-R3 acquired high protein contents (> 164.8 mg/g-VSS) with essential amino acid above 44.4%, all of which were suitable for recycling, but R2 was the best. Also, blue light significantly increased total lipid production, while red light promoted the accumulation of some unsaturated fatty acids (C18:2 and C18:3). Some unique algae and dominant bacteria (e.g., Stigeoclonium, Chlamydomonas, and Flavobacteria) enrichment and some key functions (e.g., amino acid, fatty acid, and lipid biosynthesis) up-regulation in R2 might help to improve proteins and lipids quality. Combined, this study provides valuable guidance for protein and lipid recovery from ABGS. © 2023, The Authors. All rights reserved.

关键词： Proteins

来源：评论

学校读者我要写书评

暂无评论

On the optimality of Kalman filter for fault detection

On the optimality of Kalman filter for fault detection

引用

Digital Twins and Parallel Intelligence (DTPI), IEEE International Conference on

作者： Jinming Zhou Yucai Zhu Chao Yang Yun Zhu Feng Yin State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University Hangzhou China State Key Lab of Clean Energy Utilization State Environmental Protection Center for Coal-Fired Air Pollution Control Zhejiang University Hangzhou China Zhejiang Baima Lake Laboratory Co. Ltd. Hangzhou China

ISBN: (数字)9798350349252

ISBN: (纸本)9798350349269

Kalman filter is widely used for residual generation in fault detection. It leads to optimality in fault detection using some performance indices and also leads to statistically sound residual evaluation and threshold setting. This paper shows that these nice features do not necessarily imply an optimal fault detection performance. Based on a performance index related to fault detection rate and false alarm rate, several occasions where Kalman filter should not be used are pointed out; further the residual evaluation and threshold setting are discussed, in which it is pointed out that in stochastic setting an optimal statistical test of Kamlan filter is not related to optimality of commonly used detection performance indicators. The theoretical analysis is verified through Monte Carlo simulations and Tennessee Eastman process (TEP) dataset.

关键词： Monte Carlo methods Fault detection Simulation Frequency-domain analysis Lead Feature extraction Performance analysis Kalman filters Indexes Time-varying systems

来源：评论

学校读者我要写书评

暂无评论

Insight into the Role of Heterogeneous Fenton-Like Catalyst FeCo-γ-Al2O3 with Dual Electron-Rich Centers for Ni-EDTA Removal

SSRN

引用

SSRN 2023年

作者： Zhao, Zilong Qi, Shuyu Zhou, Jianli Ren, Yatao Zheng, Kaiyun Zhang, Jin Dong, Wenyi Wang, Hongjie School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Shenzhen518055 China School of Science Harbin Institute of Technology Shenzhen Shenzhen518055 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China Shenzhen518055 China

To enhance the polarization distribution of electron cloud density on the catalyst surface, we have introduced a novel bimetallic-substituted dual-reaction center (DRC) catalyst (FeCo-γ-Al2O3) comprising iron (Fe) and cobalt (Co) for the decomplexation and mineralization of heavy metal complex Ni-EDTA in this study. Compared to the catalysts doped solely with Fe or Co, the bimetal-doped catalyst offered several advantages, including increased BET-specific surface area, enhanced electron cloud polarization distribution, additional electron transfer pathway, and improved capacity of free radical generation. Through DFT calculations and EPR tests, we have elucidated the influences of the catalyst's adsorption toward Ni-EDTA and its decomplexation products on the electron transfer between the pollutant and the catalyst. The competition between the pollutants and H2O2 affects the generation of free radical in both electron-rich and electron-deficient centers. Building on these findings, we have proposed a plausible removal mechanism of Ni-EDTA using the heterogeneous Fenton-like catalyst FeCo-γ-Al2O3. This study sheds light on the potential of FeCo-γ-Al2O3 as a DRC catalyst and emphasizes the significance of pollutant characteristics in determining the catalyst’s performance. © 2023, The Authors. All rights reserved.

关键词： Catalysts

来源：评论

学校读者我要写书评

暂无评论

High-performance catalytic ultrafiltration membrane for peroxymonosulfate activation: The utility of high-valence metal species and enhanced mass transfer

引用

Water Research 2025年 284卷 123991页

作者： Linqian Yu Minyu Zha Yao Li Jingyu Zhang Yunkun Wang State Key Laboratory of Advanced Environmental Technology Department of Environmental Science and Engineering University of Science and Technology of China Hefei 230026 China

Persulfate-based water treatment technology is a highly promising approach for pollutant degradation; however, its efficiency is often constrained by limited mass transfer. In this study, we fabricated an optimized spinel-incorporated catalytic poly(vinylidene fluoride) membrane (spinel-PVDF), which enhances the pseudo-first-order reaction kinetics constant ( k m ) to 1256.47 min -1 . Through molecular dynamics simulation, we demonstrated that the catalytic membrane facilitates the catalytic reaction process. The spinel-PVDF membrane exhibits broad pH tolerance (ranging from 3 to 12) and significant resistance to interference from humic acid and various anions. Moreover, it demonstrates effective degradation of a wide range of pollutants, particularly electron-rich compounds. Experimental evidence indicates that high-valent metal species are the principal active agents in the spinel-PVDF/peroxymonosulfate system, with singlet oxygen also playing a contributory role. The membrane demonstrates high stability, maintaining over 95 % degradation efficiency for 120 h at a flux of 100 LMH. These findings suggest that the developed spinel-PVDF membrane is highly stable and has significant potential for practical applications in wastewater treatment.

关键词： Catalytic membrane CuCoMnO(x) High-valent metal species Mass transfer enhancement Singlet oxygen

来源：评论

学校读者我要写书评

暂无评论

Rethinking the Role of Panchromatic Images in Pan-sharpening

引用

IEEE Transactions on Multimedia 2025年

作者： Wang, Jiaming Chen, Xitong Huang, Xiao Zhang, Ruiqian Wang, Yu Lu, Tao Wuhan Institute of Technology School of Computer Science and Engineering Wuhan430205 China Emory Univwersity Department of Environmental Sciences AtlantaGA30322 United States Chinese Academy of Surveying and Mapping Institute of Photogrammetry and Remote Sensing Beijing100036 China Wuhan University State Key Laboratory for Information Engineering in Surveying Mapping and Remote Sensing Wuhan430079 China

Recent pan-sharpening methods have predominantly utilized techniques tailored for natural image scenes, often overlooking the unique features arising from non-overlapping spectral responses. In light of this, we have reevaluated the utility of panchromatic (PAN) images and introduced a theory anchored in the spectral response of satellite sensors. This posits that a PAN image is effectively a linear weighted summation of individual bands from its corresponding multi-spectral (MS) image, offset by an error map. We developed a deep unmixing network termed "DUN"that integrates an unmixing network, a fusion mechanism, and a distinctive mutual information contrastive loss function. Notably, the unmixing network is adept at decomposing a PAN image into its MS counterpart and error map. Further, the demixed image alongside the low-resolution MS image is channeled into the fusion network for pan-sharpening. Recognizing the challenges of achieving robust supervised learning directly from the unmixing phase, we have innovated a mutual information contrastive learning loss function, ensuring enhanced separation and minimizing overlap during the unmixing process. Preliminary experiments underscore both the quantitative and qualitative prowess of the proposed method. © 2025 IEEE.

关键词： Contrastive Learning

来源：评论

学校读者我要写书评

暂无评论

Electrochemically reconstructable CuMn-bimetal-based metal-organic framework encapsulated Co3O4 composite for selective methanol electrooxidation

引用

Journal of Colloid and Interface science 2025年 697卷 137930页

作者： Yang, Rui Jia, Penglong Zhou, Yifan Ramli, Yusrin Wang, Peifen Lian, Wenhao Chen, Meng Huang, Wei Liu, Lei Abudula, Abuliti Guan, Guoqing of Science and Technology Hirosaki University 3-Bunkyocho Hirosaki036-8561 Japan Energy Conversion Engineering Laboratory Institute of Regional Innovation Hirosaki University 3-Bunkyocho Hirosaki036-8561 Japan College of Environmental Science and Engineering Taiyuan University of Technology Taiyuan030024 China Shanxi Research Institute for Clean Energy Tsinghua University Taiyuan030032 China College of Chemistry and Chemical Engineering Xi'an University of Science and Technology Xi'an710054 China State Key Laboratory of Clean and Efficient Coal Utilization College of Chemical Engineering and Technology Taiyuan University of Technology Shanxi Taiyuan030024 China Engineering Research Center of Nano-Geomaterials of Ministry of Education China University of Geosciences Wuhan430074 China

In this work, a CuMn-bimetal-based metal–organic framework (MOF) encapsulated Co3O4 composite (CuMn-MOF@Co3O4) with a three-dimensionmal hierarchical structure formed by interwoven nanosheets was in-situ grown on nickel foam (NF) through a three-step fabrication method for the electrochemical methanol oxidation reaction(MOR). The characterizations revealed the phase transformation of CuMn-MOF during the electrochemical activation generated abundant hydroxides/hydroxyoxides (Cu(OH)2, Mn(OH)2, MOOH), which provided optimal architecture and real active sites for MOR. At the same time, the combination of Co3O4 with the generated CuMn(OH)x effectively enhanced the synergistic interactions between them, greatly hindering high-valent hydroxides formation, lowering methanol and intermediate adsorption energy barriers, thereby ensuring highly selective electrooxidation of methanol to formate with high activity. As a result, the electrochemically reconstructable CuMn-MOF@Co3O4 composite exhibited excellent performance, achieving a high MOR current density of 500 mA cm−2 at 1.41 V vs. RHE, with a Faradaic efficiency (FE) of near 100 % and long-term stability. Moreover, in a two-electrode electrolysis system with MeOH-water solution, only 1.60 V of cell voltage was required to maintain a current density of 100 mA cm−2 for MOR-HER, which significantly reduced energy consumption compared to the conventional OER-HER system. It opens a novel avenue for the design of advanced electrochemically reconstructable MOF-based composites for elecrooxidation process. © 2025 Elsevier Inc.

关键词： Electrochemical oxidation

来源：评论

学校读者我要写书评

暂无评论

Quantifying assembly processes of dissolved organic matter pools in eutrophication using high-resolution mass spectrometry and ecological models

引用

Water Research 2025年 282卷 123781页

作者： Chen, Guan-Lin Qian, Chen Du, Meng Tong, Min-Jie Chen, Jie-Jie Yu, Han-Qing State Key Laboratory of Advanced Environmental Technology Department of Environmental Science and Engineering University of Science and Technology of China Hefei230026 China

Dissolved organic matter (DOM) represents a large, dynamic pool of carbon, playing a crucial role in eutrophic aquatic ecosystems through its continuous transport and transformation. However, the assembly mechanisms of DOM under different eutrophic conditions remain elusive, hindering the understanding of carbon dynamics and the prediction of carbon fate. Here we collected 72 lake water samples during two sampling events in Chaohu Lake, the fifth largest freshwater lake in China, and performed high-resolution mass spectrometry (HRMS) and ecological null modeling to quantify the assembly processes of DOM in eutrophication. We found that as eutrophic levels increased, the relative contribution of homogeneous selection rose, while the contributions of variable selection and dispersal limitation decreased. The influence of different assembly processes on the DOM pool across sites, although estimated solely from HRMS data, exhibited reasonable consistency with the spatiotemporal variations. Several environmental parameters, including total phosphorus, Secchi disk depth, trophic state index, pH, temperature, and fluorescence index, were significantly correlated with one or more DOM assembly processes (p © 2025 Elsevier Ltd

关键词： Aquatic ecosystems

来源：评论

学校读者我要写书评

暂无评论

Effect of the Heat Flow Distribution and Thermophysical Properties of the Pipe Wall and Fluid on the Wall Temperature Response to a Rising Taylor Bubble

SSRN

引用

SSRN 2023年

作者： Guo, Wei He, Xiufen Kong, Fulin Shen, Minghan Chen, Biduan Wang, Li Tong, Lige Jia, Chao Li, Yanhui Liu, Chuanping School of Energy and Environment Engineering University of Science and Technology Beijing Beijing100083 China Shunde Innovation School University of Science and Technology Beijing Foshan528399 China State Key Laboratory of Iron and Steel Industry Environmental Protection Beijing China China International Engineering Consulting Corporation Beijing China

A novel non-intrusive thermal diffusion measurement (TDM) method has been proposed for measuring the phase flowrates of gas–liquid slug flows in our previous research. Since the structure of TDM was arbitrarily designed and needed to be optimized for accurate measurement, the effect of the heat flow distribution and pipe wall/fluid thermophysical properties on the wall temperature response to a rising Taylor bubble (TB) is further investigated by using the CFD tool in this paper. The wall temperature and temperature rise are used to describe the wall temperature response, and their variation rules with heat flow distribution and wall/fluid thermophysical properties are presented and analyzed based on heat transfer. The simulation results indicate that the optimal heating width for a large wall temperature rise and small power consumption is 0.6D, and the optimal pipe material should be with small density/specific heat and a suitable thermal conductivity of about 15 W/(m·K). Moreover, the wall temperature response is obvious especially for TBs moving in the liquid with large fluid thermal conductivity/density/specific heat and small viscosity. The paper can clarify the wall temperature response mechanism of the heated pipe wall and provide a theoretical basis for the development of TDM method. © 2023, The Authors. All rights reserved.

关键词： Heat transfer

来源：评论

学校读者我要写书评

暂无评论

Long-Term Plume-Chasing Measurements: Emission Characteristics and Spatial Patterns of Heavy-Duty Trucks in a Megacity

SSRN

引用

SSRN 2024年

作者： Yang, Pan Wang, Hui Wu, Xiaomeng Xiao, Shupei Zheng, Xuan You, Yan Zhang, Shaojun Wu, Ye State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China College of Chemistry and Environmental Engineering Shenzhen University Guangdong Shenzhen518060 China National Observation and Research Station of Coastal Ecological Environments in Macao Macao Environmental Research Institute Macau University of Science and Technology 999078 China

Assessing the emissions of heavy-duty diesel trucks (HDDTs) is crucial for managing air quality in megacities, especially concerning nitrogen oxides (NOX) and black carbon (BC). This study employed mobile plume chasing to monitor the real-world emissions of over 7,778 HDDTs in Shenzhen. The findings indicate that the real-world NOX emission factors (EF) of China IV trucks did not differ significantly from those of China III, whereas China V and VI vehicles demonstrated fleet-averaged reductions of 27% and 85%, respectively. For China V, a significant decrease in the NOX EF for HDDTs registered after 2017 was attributed to the installation of advanced aftertreatment systems, including diesel oxidation catalysts (DOC) and Diesel Particle Filters (DPF), along with selective catalytic reduction (SCR). These technologies led to an average reduction of 42% in NOX and 61% in BC emissions. Seasonal variations were pronounced, with winter (~20°C) NOX EF 40% higher than summer (~35°C) levels. Conversely, BC EF decreased by 26% in winter, indicating significant impacts of ambient temperature on emissions. Spatial analysis revealed that the average NOX EF of HDDTs on east freeways was 1.4 times higher than that on urban expressways, influenced by variations in the proportion of vehicle types segmented by usage. These findings offer a comprehensive perspective on HDDTs emissions, highlighting the importance of large-scale emission monitoring through plume chasing for precise and effective control of real-world HDDTs emissions. © 2024, The Authors. All rights reserved.

关键词： Nitrogen oxides

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：