Johnson Matthey Technology Review最新文献_第6页

Electrochemical Synthesis of Monodisperse PtCo Nanocrystals 单分散PtCo纳米晶的电化学合成

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651323x16799975192215

Daniel J. Rosen, Duncan Zavanelli, Christopher B. Murray

引用次数: 0

Fabrication of Two-Dimensional Material Membranes 二维材料膜的制备

4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651324x16981367461019

Haowen Li, Qingqing Pan, Xiao Sui, Yuan Chen

引用次数: 0

Extension of a Zero-Dimensional Mixing-Controlled Combustion Model for the Development of a NOx–Free System Based on the Oxy-Combustion Concept 基于全氧燃烧概念的无nox系统开发的零维混合控制燃烧模型的扩展

4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651324x16963284171824

José R. Serrano, J. Javier López, Jaime Martín, Gabriela Bracho

{"title":"Extension of a Zero-Dimensional Mixing-Controlled Combustion Model for the Development of a NOx–Free System Based on the Oxy-Combustion Concept","authors":"José R. Serrano, J. Javier López, Jaime Martín, Gabriela Bracho","doi":"10.1595/205651324x16963284171824","DOIUrl":"https://doi.org/10.1595/205651324x16963284171824","url":null,"abstract":"Oxy-combustion is a promising concept to achieve an extremely clean combustion, independently of the fuel type, because, on the one hand, it is a NOx-free combustion and, on the other hand, the CO2 produced during combustion can be easily captured once the water vapor is removed from the exhaust gases stream, consequently allowing also carbon neutral operation. An existing 0D, mixing-controlled combustion model, developed for a standard diesel combustion scenario, has been adapted to the oxy-fuel combustion scenario. Initially, the model over-predicted the heat release at the end of the combustion process. The main model adaptation was to modify the relationship between the average YO2 and the effective YO2 (i.e. the one of the charge actually entrained by the spray), to be consistent with the significant increase in compression ratio needed in the oxy-fuel context. As a result, a model able to correctly predict the combustion behaviour at any operating condition has been obtained, which finally represents a very suitable tool to assist in the concept development.","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135913819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrogen Use in a Dual-Fuel Compression-Ignition Engine with Alternative Biofuels 氢在双燃料压缩点火发动机与替代生物燃料中的应用

4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651324x16963489202714

José Rodríguez-Fernández, Ángel Ramos, Víctor M. Domínguez, Blanca Giménez, Miriam Reyes, Juan J. Hernández

{"title":"Hydrogen Use in a Dual-Fuel Compression-Ignition Engine with Alternative Biofuels","authors":"José Rodríguez-Fernández, Ángel Ramos, Víctor M. Domínguez, Blanca Giménez, Miriam Reyes, Juan J. Hernández","doi":"10.1595/205651324x16963489202714","DOIUrl":"https://doi.org/10.1595/205651324x16963489202714","url":null,"abstract":"Recent progress has been made towards decarbonization of transport, which accounts for one quarter of the global carbon dioxide emissions. For the short-medium term, new EU and national energy and climate plans agree on a strategy based on the combination of increasing shares of electric vehicles with the promotion of sustainable fuels, especially if produced from residual feedstock and routes with low or zero net carbon emission. Hydrogen stands out among these fuels for its unique properties. This work analyses the potential of using hydrogen in a dual-fuel, compression-ignition engine running with three diesel-like fuels (conventional fossil diesel, advanced biodiesel and hydrotreated vegetable oil-HVO) and different hydrogen energy substitution ratios. The results were confronted with conventional diesel operation, revealing that dual-fuel combustion with hydrogen demands higher EGR rates and more advance combustion, leading to a remarked reduction of NOx emission at the expense of a penalty in energy consumption due mainly to unburnt hydrogen and wall heat losses. Unreacted hydrogen was ameliorated at high load. At low load, the use of biodiesel dual combustion permitted higher hydrogen substitution ratios and higher efficiencies than diesel and HVO.","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135914177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Review of the Sources, Environmental Behaviors, and Human Health of Atmospheric Microplastics 大气中微塑料的来源、环境行为和人体健康研究进展

4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651324x16964141254874

Bowen Zhang, Rencheng Zhu, Yunjing Wang

{"title":"A Review of the Sources, Environmental Behaviors, and Human Health of Atmospheric Microplastics","authors":"Bowen Zhang, Rencheng Zhu, Yunjing Wang","doi":"10.1595/205651324x16964141254874","DOIUrl":"https://doi.org/10.1595/205651324x16964141254874","url":null,"abstract":"The article places emphasis on the latest advancements in this field, particularly focusing on indoor and outdoor microplastic (MP) pollution, including their emission, behavior, and potential health hazards. Gaining an in-depth understanding of these factors is crucial for devising effective strategies to mitigate the impact of microplastics (MPs) on human health and the environment. Indoor MP abundance is generally higher than outdoor levels, with textiles serving as a primary source of indoor airborne MPs. Traffic-derived MP particles, MP fibers in residential areas, agricultural plastic mulch, marine MPs, and landfill sites appear to be contributors to outdoor atmospheric MP pollution. Factors such as wind direction, wind speed, precipitation, and snowfall, along with the physical characteristics and secondary suspension of MPs, collectively influence their behavior, distribution, and fate. Inhalation and ingestion constitute the main exposure pathways for airborne MPs, potentially leading to health issues like respiratory inflammation. Therefore, gaining a deeper insight into the behavior and impact mechanisms of atmospheric MPs aids in formulating effective risk management strategies to safeguard human health and maintain environmental sustainability.","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135954183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanochemistry: A Green and Fast Method to Prepare A New Generation of Metal Supported Catalysts 机械化学:一种绿色快速制备新一代金属负载催化剂的方法

4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651323x16933888986996

Maila Danielis, Sara Colussi, Núria J. Divins, Lluís Soler, Alessandro Trovarelli, Jordi Llorca

引用次数: 1

X-Ray Computed Tomography for Failure Mechanism Characterisation within Layered Pouch Cells: Part II 层状袋状细胞内失效机制特征的x射线计算机断层扫描:第二部分

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651323x16686891950941

Drasti Patel, H. Reid, Sarah Ball, D. Brett, P. Shearing

引用次数: 0

Guest Editorial: The Continuing Importance of Platinum Group Metals 嘉宾评论:铂族金属的持续重要性

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651323x16850003560865

Emma Schofield

引用次数: 0

Potential of Hydrogen Internal Combustion Engine for the Decarbonized Passenger Vehicle 氢内燃机在脱碳乘用车中的潜力

4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651324x16965074891718

Seung Woo Lee, Hong-kil Baek, Kyeonghyeon Lee

{"title":"Potential of Hydrogen Internal Combustion Engine for the Decarbonized Passenger Vehicle","authors":"Seung Woo Lee, Hong-kil Baek, Kyeonghyeon Lee","doi":"10.1595/205651324x16965074891718","DOIUrl":"https://doi.org/10.1595/205651324x16965074891718","url":null,"abstract":"CO2 regulations are becoming very stringent due to the goal of reducing greenhouse gases and achieving carbon neutrality. It has already become a common situation that electric vehicles are emerging as eco-friendly power systems rather than vehicles equipped with conventional internal combustion engines, and their share in the market is increasing. However, even with an internal combustion engine, CO2 can be drastically reduced if a carbon-free fuel such as hydrogen is used. Raw NOx emissions can be overcome to a certain level through ultra-lean burn operation, but in order to balance the amount of hydrogen and air in the limited space of combustion chamber, a drop in the engine's maximum output should be accepted. Hyundai Motor Company also previously developed an engine using hydrogen fuel, but was unable to progress to mass production. Since then, hybrid technology has become popular, and with the development of hydrogen injection devices, an era has arrived where the possibility of mass production can be increased. and for this reason, various studies on internal combustion engines using hydrogen fuel based on existing SI engines or CI engines are rapidly increasing recently. In this study, a hydrogen fuel engine was designed and manufactured based on the mass produced gasoline spark ignition engine. CO2 level was confirmed from initial performance evaluation, and it is found that raw NOx levels and maximum power were in a trade-off relationship with each other under same air-charging system application. In addition, the method to improve maximum engine torque was verified while maintaining the raw NOx level, and the maximum engine power improvement level was confirmed when raw NOx emissions were allowed to increase. Thereby it was shown that the potential of the carbon-neutral internal combustion engine.","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135953834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of Solution Chemistry on the Biotechnological Synthesis and Properties of Palladium Nanoparticles 溶液化学对钯纳米颗粒生物技术合成及性能的影响

IF 2.3 4区化学

Johnson Matthey Technology Review Pub Date : 2023-01-01 DOI: 10.1595/205651323x16813753335431

Christopher Egan-Morriss, R. Kimber, N. A. Powell, J. Lloyd

{"title":"Impact of Solution Chemistry on the Biotechnological Synthesis and Properties of Palladium Nanoparticles","authors":"Christopher Egan-Morriss, R. Kimber, N. A. Powell, J. Lloyd","doi":"10.1595/205651323x16813753335431","DOIUrl":"https://doi.org/10.1595/205651323x16813753335431","url":null,"abstract":"The biosynthesis of Pd nanoparticles supported on microbial cells (bio-Pd) has attracted much recent interest, but the effect of solution chemistry on the process remains poorly understood. Biological buffers can be used to maintain physiological pH during the bioreduction of Pd(II) to Pd(0) by microbial cells, however, buffer components have the potential to complex Pd(II), and this may affect the subsequent microbe-metal interaction. In this study, a range of Pd(II) salts and biological buffers were selected to assess the impact of the solution chemistry on the rate of bioreduction of Pd(II) by Geobacter sulfurreducens, and the resulting biogenic Pd nanoparticles. The different buffer and Pd(II) combinations resulted in changes in the dominant Pd(II) species in solution, and this affected the amount of Pd recovered from solution by the microbial cells. The physical properties of the bio-Pd nanoparticles were altered under different solution chemistries; only slight variations were observed in the mean particle size (< 6 nm), but significant variations in particle agglomeration, the extent of Pd(II) bioreduction, and subsequent catalytic activity for the reduction of 4-nitrophenol were observed. The combination of sodium tetrachloropalladate and bicarbonate buffer resulted in bio-Pd with the smallest mean particle size, and the fastest initial rate of reaction for 4-NP reduction (0.33 min-1). Other solution chemistries appeared to damage the cells and result in bio-Pd with relatively poor catalytic performance. This work emphasises that future studies into bio-Pd synthesis should consider the importance of solution chemistry in controlling the speciation of Pd(II) and its impact on both the bioreduction process and the resulting properties of the nanoparticles produced, in order to maximize Pd(II) biorecovery and optimize catalytic properties.","PeriodicalId":14807,"journal":{"name":"Johnson Matthey Technology Review","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67352122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0