Pub Date : 2024-09-01DOI: 10.1088/1742-6596/2838/1/012028
Jiale Zhu, Guoqiang Xu, Yanghong You, Youwei He
The main noise source of fuel cell vehicles comes from the cooling vehicle, which has the characteristics of high voltage and large air volume. However, the large air volume makes the fan noise level significantly increase, reaching about 70dB. Even if the car adopts a variety of physical noise reduction methods, the noise level inside the car is still high, seriously affecting the passenger ride experience. In recent years, related research combined with bionic technology to improve the fan blade by designing a new shape structure, so that it has similar characteristics to some organisms to achieve the purpose of noise reduction. In this paper, ANSYS-CFX software is used to simulate the fan efficiency and noise level under different blade numbers, predict its performance, and optimize its structure.
{"title":"Research and design of low-noise cooling fan for fuel cell vehicle","authors":"Jiale Zhu, Guoqiang Xu, Yanghong You, Youwei He","doi":"10.1088/1742-6596/2838/1/012028","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012028","url":null,"abstract":"The main noise source of fuel cell vehicles comes from the cooling vehicle, which has the characteristics of high voltage and large air volume. However, the large air volume makes the fan noise level significantly increase, reaching about 70dB. Even if the car adopts a variety of physical noise reduction methods, the noise level inside the car is still high, seriously affecting the passenger ride experience. In recent years, related research combined with bionic technology to improve the fan blade by designing a new shape structure, so that it has similar characteristics to some organisms to achieve the purpose of noise reduction. In this paper, ANSYS-CFX software is used to simulate the fan efficiency and noise level under different blade numbers, predict its performance, and optimize its structure.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2838/1/012002
Shilin Li, Yuxin Wang, Kun Tang, Han Guo, Yifan Guo, Long You, Zhi Lu and Guangxin Wang
This paper uses a common one-step hydrothermal method to prepare NiMn-LDH/NF (Layered Double Hydroxide, LDH) oxygen evolution catalyst with outstanding performance. The NiMn-LDH grows into a nanosheet array structure on nickel foam (NF) and it has a big surface area and exceptional ion transport function that could accelerate the diffusion rate of electrocatalytic products. It attempted to modulate the molar proportion of Ni and Mn to explore the oxygen evolution reaction (OER) performance of the NiMn-LDH/NF catalysts. It was found that when Ni:Mn=4:1 (molar ratio, hereinafter), the nanosheets grew more densely and had better OER performance and stability. The electrochemical test results show that the Ni4Mn-LDH/NF catalyst exhibits an overvoltage of 341 mV at a current density of 10 mA cm−2, and the Tafel slope is only 98.99 mV dec−1.
本文采用常见的一步水热法制备了性能优异的镍锰-LDH/NF（层状双氢氧化物，LDH）氧进化催化剂。镍锰-LDH在泡沫镍（NF）上生长成纳米片阵列结构，具有较大的比表面积和优异的离子传输功能，可加快电催化产物的扩散速度。研究人员试图通过调节镍和锰的摩尔比例来探索镍锰-LDH/NF 催化剂的氧进化反应（OER）性能。研究发现，当 Ni:Mn=4:1（摩尔比，下同）时，纳米片生长更致密，具有更好的 OER 性能和稳定性。电化学测试结果表明，在电流密度为 10 mA cm-2 时，Ni4Mn-LDH/NF 催化剂的过电压为 341 mV，塔菲尔斜率仅为 98.99 mV dec-1。
{"title":"Preparation of nickel-manganese based bimetallic hydroxide nanosheets for enhanced electrocatalytic oxygen evolution reaction","authors":"Shilin Li, Yuxin Wang, Kun Tang, Han Guo, Yifan Guo, Long You, Zhi Lu and Guangxin Wang","doi":"10.1088/1742-6596/2838/1/012002","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012002","url":null,"abstract":"This paper uses a common one-step hydrothermal method to prepare NiMn-LDH/NF (Layered Double Hydroxide, LDH) oxygen evolution catalyst with outstanding performance. The NiMn-LDH grows into a nanosheet array structure on nickel foam (NF) and it has a big surface area and exceptional ion transport function that could accelerate the diffusion rate of electrocatalytic products. It attempted to modulate the molar proportion of Ni and Mn to explore the oxygen evolution reaction (OER) performance of the NiMn-LDH/NF catalysts. It was found that when Ni:Mn=4:1 (molar ratio, hereinafter), the nanosheets grew more densely and had better OER performance and stability. The electrochemical test results show that the Ni4Mn-LDH/NF catalyst exhibits an overvoltage of 341 mV at a current density of 10 mA cm−2, and the Tafel slope is only 98.99 mV dec−1.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"2013 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2830/1/012004
Mohamed Dawam, Hussein Oraby and Mohamed Gobara
The contamination of water by various toxic constituents, particularly heavy metals, exerts deleterious effects on both flora and fauna, with potential repercussions for human well-being. Consequently, there exists a pressing imperative to explore methodologies aimed at the elimination of hazardous substances from polluted water. Among the array of extant approaches, membrane-based techniques emerge as notably efficacious for mitigating pollutants, specifically heavy metals, in water systems. The elimination of mineral contaminants from water holds paramount significance for fostering a hygienic environment and safeguarding human health. Polymeric membranes offer an energy-efficient approach to water purification, yet they encounter fouling issues during filtration. Surface modification of the membrane is one avenue for mitigating fouling, aiding in the maintenance of elevated water productivity levels. The present investigation undertakes a comprehensive examination of outcomes derived from diverse experiments conducted over the preceding two decades, with the objective of identifying the most pertinent membrane filtration processes, accounting for varied contaminant profiles.
{"title":"A Review on: Advances in Membrane Technologies for Heavy Metal Removal from contaminated Water","authors":"Mohamed Dawam, Hussein Oraby and Mohamed Gobara","doi":"10.1088/1742-6596/2830/1/012004","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/012004","url":null,"abstract":"The contamination of water by various toxic constituents, particularly heavy metals, exerts deleterious effects on both flora and fauna, with potential repercussions for human well-being. Consequently, there exists a pressing imperative to explore methodologies aimed at the elimination of hazardous substances from polluted water. Among the array of extant approaches, membrane-based techniques emerge as notably efficacious for mitigating pollutants, specifically heavy metals, in water systems. The elimination of mineral contaminants from water holds paramount significance for fostering a hygienic environment and safeguarding human health. Polymeric membranes offer an energy-efficient approach to water purification, yet they encounter fouling issues during filtration. Surface modification of the membrane is one avenue for mitigating fouling, aiding in the maintenance of elevated water productivity levels. The present investigation undertakes a comprehensive examination of outcomes derived from diverse experiments conducted over the preceding two decades, with the objective of identifying the most pertinent membrane filtration processes, accounting for varied contaminant profiles.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2830/1/012006
Ghada O Mohamed, Maher E Saleh and Ahmed S Elsafty
There is a great global interest in controlling air pollutants, specifically greenhouse gases including nitrogen oxides (NOx), nitric oxide is one of its basic components. For this reason, this study dealt with the use of biochar manufactured from agricultural waste from sunflower seed husk (SSHB) with 450°C pyrolysis in the adsorption of 90 ppm concentration of nitric oxide (NO) gas within 480 seconds (8 minutes) by flow rate 1.2 (liter/minute). Two kinds of particle sizes coarse (C) and fine (F) of SSHB were used, and some physiochemical properties of the biochar were studied, including SEM and FTIR, in addition to the BET surface area, which was 3.9 (m2/g). The adsorption results displayed that SSHB (F) is better at the adsorption of NO 31.6 (mg/g) than SSHB (C) 26.7 (mg/g). Isotherm models were applied to the mathematical modelling of NO absorption, and based on n and R2 values the results of the SSHB adsorption for NO fixed with both the Freundlich model and the kinetic pseudo second order model.
控制空气污染物，特别是包括氮氧化物（NOx）在内的温室气体（一氧化氮是其基本成分之一）引起了全球极大的关注。因此，本研究利用农业废弃物葵花籽壳（SSHB）经 450°C 高温分解制成的生物炭，以 1.2 升/分钟的流速在 480 秒（8 分钟）内吸附 90 ppm 浓度的一氧化氮（NO）气体。采用粗（C）和细（F）两种粒径的 SSHB，研究了生物炭的一些理化性质，包括扫描电镜和傅立叶变换红外光谱，以及 BET 表面积（3.9（m2/g））。吸附结果表明，SSHB（F）吸附 NO 31.6（mg/g）的能力优于 SSHB（C）的 26.7（mg/g）。根据 n 和 R2 值，SSHB 对 NO 的吸附结果与 Freundlich 模型和动力学伪二阶模型相吻合。
{"title":"Decreasing the nitric oxide gas concentration by using sunflower seed husk biochar as filter","authors":"Ghada O Mohamed, Maher E Saleh and Ahmed S Elsafty","doi":"10.1088/1742-6596/2830/1/012006","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/012006","url":null,"abstract":"There is a great global interest in controlling air pollutants, specifically greenhouse gases including nitrogen oxides (NOx), nitric oxide is one of its basic components. For this reason, this study dealt with the use of biochar manufactured from agricultural waste from sunflower seed husk (SSHB) with 450°C pyrolysis in the adsorption of 90 ppm concentration of nitric oxide (NO) gas within 480 seconds (8 minutes) by flow rate 1.2 (liter/minute). Two kinds of particle sizes coarse (C) and fine (F) of SSHB were used, and some physiochemical properties of the biochar were studied, including SEM and FTIR, in addition to the BET surface area, which was 3.9 (m2/g). The adsorption results displayed that SSHB (F) is better at the adsorption of NO 31.6 (mg/g) than SSHB (C) 26.7 (mg/g). Isotherm models were applied to the mathematical modelling of NO absorption, and based on n and R2 values the results of the SSHB adsorption for NO fixed with both the Freundlich model and the kinetic pseudo second order model.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2830/1/012001
Ahmed S. El-Kholany, Nourhan S. Shehata and Hesham M. Kamel
Due to the prevalence of FF, its complexes with (CoII, NiII, and CuII) were prepared, characterized, and the effect of these metal ions on the biological effectiveness of FF was studied. Elemental analysis; IR and 1H-NMR were used to determine the structures and mode of bonding, TGA, and DSC techniques were used to make thermal analysis for the prepared complexes. TGA was used to study the mechanisms of the thermal decomposition for florfenicol complexes. The prepared complexes are thermally stable and started to decompose after 200οC. Broido’s method was used to determine the activation energy for the prepared compounds, while thermal transitions and kinetic studies were carried out by differential scanning calorimetry technique (DSC). The antimicrobial activity of the complexes of florfenicol with different concentrations (0.005, 0.01, 0.02 μg/mL) was examined by the agar prolixity technique against common human pathogenic Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative). Comparatively, Nickel and Copper complexes showed a higher zone of inhibition against the tested pathogens. The antibiotic complexes were more active than the ligand itself for some breeds.
{"title":"Physico-chemical and Biological Studies of Some Metal Complexes with Fluorinated Chloramphenicol Derivative","authors":"Ahmed S. El-Kholany, Nourhan S. Shehata and Hesham M. Kamel","doi":"10.1088/1742-6596/2830/1/012001","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/012001","url":null,"abstract":"Due to the prevalence of FF, its complexes with (CoII, NiII, and CuII) were prepared, characterized, and the effect of these metal ions on the biological effectiveness of FF was studied. Elemental analysis; IR and 1H-NMR were used to determine the structures and mode of bonding, TGA, and DSC techniques were used to make thermal analysis for the prepared complexes. TGA was used to study the mechanisms of the thermal decomposition for florfenicol complexes. The prepared complexes are thermally stable and started to decompose after 200οC. Broido’s method was used to determine the activation energy for the prepared compounds, while thermal transitions and kinetic studies were carried out by differential scanning calorimetry technique (DSC). The antimicrobial activity of the complexes of florfenicol with different concentrations (0.005, 0.01, 0.02 μg/mL) was examined by the agar prolixity technique against common human pathogenic Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative). Comparatively, Nickel and Copper complexes showed a higher zone of inhibition against the tested pathogens. The antibiotic complexes were more active than the ligand itself for some breeds.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2838/1/012004
Dedi Li, Biao Feng, Minrui Liu, Yuanlin Luo, Yuechao Wu, Junyang Xu and Jun Zhao
As a clean and efficient fuel derived from coal, coal water slurry can be produced by using industrial wastewater, promoting resource recirculation and environmental preservation. To maintain fluidity and stability during industrial applications of coal wastewater slurry, stabilizers play a crucial role. To promote the energy utilization of industrial wastewater, this article conducted a comparative study on different stabilizers for coal wastewater slurry. The results are as follows: (a) Compared with other stabilizers, xanthan gum makes the water separation rate of the coal wastewater slurry the lowest, and the slurry still maintained good stability after standing for 1 week and 1 month; (b) If the coal wastewater slurry requires a short storage time, the slurry properties with a blending ratio of 0.05% of xanthan gum will be the best; if the coal wastewater slurry requires a longer storage time, it can be made with a blending ratio of 0.10% of xanthan gum. The conclusion presented in this paper offers valuable insights for selecting stabilizers during the preparation of coal wastewater slurry.
{"title":"Waste to energy-study on the optimal types and dosage of additives for coal wastewater slurry","authors":"Dedi Li, Biao Feng, Minrui Liu, Yuanlin Luo, Yuechao Wu, Junyang Xu and Jun Zhao","doi":"10.1088/1742-6596/2838/1/012004","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012004","url":null,"abstract":"As a clean and efficient fuel derived from coal, coal water slurry can be produced by using industrial wastewater, promoting resource recirculation and environmental preservation. To maintain fluidity and stability during industrial applications of coal wastewater slurry, stabilizers play a crucial role. To promote the energy utilization of industrial wastewater, this article conducted a comparative study on different stabilizers for coal wastewater slurry. The results are as follows: (a) Compared with other stabilizers, xanthan gum makes the water separation rate of the coal wastewater slurry the lowest, and the slurry still maintained good stability after standing for 1 week and 1 month; (b) If the coal wastewater slurry requires a short storage time, the slurry properties with a blending ratio of 0.05% of xanthan gum will be the best; if the coal wastewater slurry requires a longer storage time, it can be made with a blending ratio of 0.10% of xanthan gum. The conclusion presented in this paper offers valuable insights for selecting stabilizers during the preparation of coal wastewater slurry.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2830/1/012008
Amol Ganesh Deshmukh
As part of the efforts to ensure a place in the global competitive landscape, Oman is aligning itself with sustainable development through diversified economic measures. To address the United Nations thirteenth Sustainable Development Goal (SDG) which is climate action, the stakeholders of Oman need to understand the carbon dioxide (CO2) emissions and compare the amount of CO2 with the emissions in neighbouring Gulf Cooperation Council (GCC) countries such as United Arab Emirates (UAE), Bahrain, Qatar, Kuwait, and Kingdom of Saudi Arabia (KSA). In this research, an attempt is being made to collect the CO2 emission for all these countries and show them on a web map using python programming language. The data ranging from year 1964 to 2021 is collected from CO2 and Greenhouse Gas Emissions in Comma Separated Values (csv) format. For each country, an approximate location for Capital in terms of Latitude and Longitude is taken from google maps. Using folium library of python, these locations and CO2 emission for a particular year is plotted on google map Application Programming Interface (API). The findings reveal that Oman’s CO2 emissions from fossil fuels and industry in 2022 year is 72 million tonnes which is relatively lower when compared to those of smaller GCC countries such as Qatar (101 million tonnes) and the UAE (244 million tonnes). Nonetheless, a gradual upward trend of 12 million tonnes of CO2 emissions has been observed in Oman between the years 2019 to 2022. The python program provides an easy way to visualise the CO2 emission heatmap without the need of any proprietary software or program.
{"title":"CO2 emission heat map of Gulf Cooperation Council region using Python for Geographic Information Systems","authors":"Amol Ganesh Deshmukh","doi":"10.1088/1742-6596/2830/1/012008","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/012008","url":null,"abstract":"As part of the efforts to ensure a place in the global competitive landscape, Oman is aligning itself with sustainable development through diversified economic measures. To address the United Nations thirteenth Sustainable Development Goal (SDG) which is climate action, the stakeholders of Oman need to understand the carbon dioxide (CO2) emissions and compare the amount of CO2 with the emissions in neighbouring Gulf Cooperation Council (GCC) countries such as United Arab Emirates (UAE), Bahrain, Qatar, Kuwait, and Kingdom of Saudi Arabia (KSA). In this research, an attempt is being made to collect the CO2 emission for all these countries and show them on a web map using python programming language. The data ranging from year 1964 to 2021 is collected from CO2 and Greenhouse Gas Emissions in Comma Separated Values (csv) format. For each country, an approximate location for Capital in terms of Latitude and Longitude is taken from google maps. Using folium library of python, these locations and CO2 emission for a particular year is plotted on google map Application Programming Interface (API). The findings reveal that Oman’s CO2 emissions from fossil fuels and industry in 2022 year is 72 million tonnes which is relatively lower when compared to those of smaller GCC countries such as Qatar (101 million tonnes) and the UAE (244 million tonnes). Nonetheless, a gradual upward trend of 12 million tonnes of CO2 emissions has been observed in Oman between the years 2019 to 2022. The python program provides an easy way to visualise the CO2 emission heatmap without the need of any proprietary software or program.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142269230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2830/1/011002
All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Double Anonymous • Conference submission management system: Morressier • Number of submissions received: 36 • Number of submissions sent for review: 34 • Number of submissions accepted: 30 • Acceptance Rate (Submissions Accepted / Submissions Received × 100): 83.3 • Average number of reviews per paper: 3.066666666666667 • Total number of reviewers involved: 46 • Contact person for queries: Name: hosam mostafa Email: icee@mtc.edu.eg Affiliation: Military Technical College
{"title":"Peer Review Statement","authors":"","doi":"10.1088/1742-6596/2830/1/011002","DOIUrl":"https://doi.org/10.1088/1742-6596/2830/1/011002","url":null,"abstract":"All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Double Anonymous • Conference submission management system: Morressier • Number of submissions received: 36 • Number of submissions sent for review: 34 • Number of submissions accepted: 30 • Acceptance Rate (Submissions Accepted / Submissions Received × 100): 83.3 • Average number of reviews per paper: 3.066666666666667 • Total number of reviewers involved: 46 • Contact person for queries: Name: hosam mostafa Email: icee@mtc.edu.eg Affiliation: Military Technical College","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142258146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ductile cast iron is widely used in the manufacturing of components and dies due to its excellent performance and low cost. Laser surface quenching can further improve its performance and extend its service life. This article uses scanning electron microscopy, electron backscattered scattering detection and microhardness tester to systematically analyse the microstructure evolution of the melted zone, hardened zone, and matrix of ductile cast iron with laser surface quenching. The hardening zone can be divided into two layers: one layer contains a large amount of martensite, graphite, and bits of residual austenite, and the other layer contains a composite structure of graphite, ferrite, layered martensite+austenite+Fe3C. On the basis of microstructure research, the determination and optimization methods of the depth of the laser surface hardening zone and the process are formed, providing a basis for the selection and optimization of the laser surface hardening process for ductile cast iron.
{"title":"Research on microstructure evolution of laser surface quenching of ductile cast iron","authors":"Huizhen Wang, Yuewen Zhai, Leyu Zhou, Zhenyu Fan, Zibo Zhang and Yuheng Zhan","doi":"10.1088/1742-6596/2838/1/012003","DOIUrl":"https://doi.org/10.1088/1742-6596/2838/1/012003","url":null,"abstract":"Ductile cast iron is widely used in the manufacturing of components and dies due to its excellent performance and low cost. Laser surface quenching can further improve its performance and extend its service life. This article uses scanning electron microscopy, electron backscattered scattering detection and microhardness tester to systematically analyse the microstructure evolution of the melted zone, hardened zone, and matrix of ductile cast iron with laser surface quenching. The hardening zone can be divided into two layers: one layer contains a large amount of martensite, graphite, and bits of residual austenite, and the other layer contains a composite structure of graphite, ferrite, layered martensite+austenite+Fe3C. On the basis of microstructure research, the determination and optimization methods of the depth of the laser surface hardening zone and the process are formed, providing a basis for the selection and optimization of the laser surface hardening process for ductile cast iron.","PeriodicalId":16821,"journal":{"name":"Journal of Physics: Conference Series","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142199360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-31DOI: 10.1088/1742-6596/2838/1/012005
Song Wu, Shen Li, Shuxia Yuan, Bintao Guo and Quansen Niu
The investigation on microwave-induced permeabilization and response of coal under microwave heating is of great significance for the industrial application of microwave heating technology instead of traditional heating in coalbed methane mining. Santanghu coal is used as a sample to measure the permeability and porosity of coal samples before and after microwave heating. The fracture changes of coal samples before and after heating are compared to observe the penetration effect of microwaves on coal samples. Based on the technology of directional drilling and continuous tubing technology in petroleum engineering, a technology of increasing the production of coalbed methane by microwave heating in a wide range of coal seams is proposed. The feasibility of this enhanced production method is validated through COMSOL Multiphysics simulations, which model the temperature field distribution within coal seams under various microwave parameters. This approach highlights the potential of microwave technology in coalbed methane recovery. The results show that: (1) the thermal field of coal samples under microwave heating is inhomogeneous. The average length and area of the cracks of the coal samples increased under microwave radiation, and the cracking of the coal samples confirmed the cracking effect of microwaves on the coal samples. (2) With prolonged microwave heating, coal samples exhibit an initial decrease followed by an increase in porosity and permeability, a trend attributed to the expansion of solid particles that occupy and reduce pore spaces. (3) The in-situ microwave heating technique for coalbed methane extraction overcomes the challenges of long-distance microwave transmission loss and methane backflow in transmission pipelines, utilizing continuous pipelines for extensive microwave heating of coal seams. (4) The microwave power and intermittent heating duration have a significant effect on the temperature field distribution of the coal seam, and when the heating duration is 60 days, 1600 W is used to have an effective temperature field distribution while avoiding the waste of heat. When the power is constant at 1600 W, the effective temperature range is wider when the intermittent heating duration is 60 days.
研究微波加热下煤炭的透气性和响应，对于在煤层气开采中以微波加热技术替代传统加热技术的工业应用具有重要意义。以三塘湖煤为样品，测量煤样在微波加热前后的透气性和孔隙度。对比煤样加热前后的断裂变化，观察微波对煤样的穿透效果。以石油工程中的定向钻井技术和连续油管技术为基础，提出了在大范围煤层中通过微波加热提高煤层气产量的技术。通过 COMSOL 多物理场仿真，模拟了不同微波参数下煤层内的温度场分布，验证了这种增产方法的可行性。这种方法凸显了微波技术在煤层气回收中的潜力。结果表明(1) 煤样在微波加热下的热场是不均匀的。煤样裂纹的平均长度和面积在微波辐射下增加，煤样的裂纹证实了微波对煤样的裂纹效应。(2）随着微波加热时间的延长，煤样的孔隙率和透气性先下降后上升，这种趋势归因于固体颗粒的膨胀占据并减少了孔隙空间。(3) 煤层甲烷抽采的原位微波加热技术克服了长距离微波传输损耗和甲烷在传输管道中倒流的难题，利用连续管道对煤层进行大范围微波加热。(4）微波功率和间歇加热时间对煤层的温度场分布有显著影响，当加热时间为 60 天时，采用 1600 W 的微波功率可获得有效的温度场分布，同时避免热量浪费。当功率恒定为 1600 W 时，当间歇加热持续时间为 60 天时，有效温度范围较宽。
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