Pub Date : 2024-01-02DOI: 10.56028/aetr.9.1.281.2024
Zhengan Wu
In this paper, based on the existing research progress and challenges in unmanned aerial vehicles (UAVs), efforts are made to enhance the performance of UAVs in terms of endurance and range by optimizing the energy and power systems. We propose the concept of a composite UAV and further introduce the concept of a solar-powered UAV. The paper outlines the project's design philosophy and innovative aspects, followed by an exploration of potential applications. Energy control calculations are then conducted, leading to the proposal of a gravity energy storage strategy. Then a preliminary flight control scheme is presented. This paper concludes with a conclusion and prospects for future work.
{"title":"Overview and Energy Power Analysis of Composite Solar Unmanned Aerial Vehicles","authors":"Zhengan Wu","doi":"10.56028/aetr.9.1.281.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.281.2024","url":null,"abstract":"In this paper, based on the existing research progress and challenges in unmanned aerial vehicles (UAVs), efforts are made to enhance the performance of UAVs in terms of endurance and range by optimizing the energy and power systems. We propose the concept of a composite UAV and further introduce the concept of a solar-powered UAV. The paper outlines the project's design philosophy and innovative aspects, followed by an exploration of potential applications. Energy control calculations are then conducted, leading to the proposal of a gravity energy storage strategy. Then a preliminary flight control scheme is presented. This paper concludes with a conclusion and prospects for future work.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140515466","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 : 2024-01-02DOI: 10.56028/aetr.9.1.298.2024
Li Ren, Chiyu Huang, Heng Hao
Male infertility is a common problem among couples, and about 50% of infertilities are caused by male partners, mainly due to poor sperm quality.The quality of semen is influenced by many factors, including male physical condition, lifestyle and environmental factors.In recent years, there has been widespread concern about the impact of high blood pressure, diabetes, lifestyle and environmental factors on semen quality.In order to study the relationship between high blood pressure, diabetes, lifestyle and environmental factors and sperm quality, we reviewed the relevant literature in the following databases: PubMed/Medline, EMBASE (Elsevier), Scopus, Web of Science and Google Scholar.The study concluded that the decline in male sperm mass, especially in sperm quality associated with high blood pressure, diabetes, poor lifestyle and environmental factors, had a significant impact on human fertility and had become an important public health problem of this century.Infertility can therefore be prevented through a structured plan for lifestyle change, such as education, improved environment, reasonable nutrition, adequate amount of physical exercise and psychological support, to prevent and control high blood pressure and diabetes.This helps couples improve their quality of life and increase their chances of natural conception, or optimize their chances for conception.
{"title":"Progress in the influence of high blood pressure, diabetes, lifestyle and environmental factors on the quality of male semen","authors":"Li Ren, Chiyu Huang, Heng Hao","doi":"10.56028/aetr.9.1.298.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.298.2024","url":null,"abstract":"Male infertility is a common problem among couples, and about 50% of infertilities are caused by male partners, mainly due to poor sperm quality.The quality of semen is influenced by many factors, including male physical condition, lifestyle and environmental factors.In recent years, there has been widespread concern about the impact of high blood pressure, diabetes, lifestyle and environmental factors on semen quality.In order to study the relationship between high blood pressure, diabetes, lifestyle and environmental factors and sperm quality, we reviewed the relevant literature in the following databases: PubMed/Medline, EMBASE (Elsevier), Scopus, Web of Science and Google Scholar.The study concluded that the decline in male sperm mass, especially in sperm quality associated with high blood pressure, diabetes, poor lifestyle and environmental factors, had a significant impact on human fertility and had become an important public health problem of this century.Infertility can therefore be prevented through a structured plan for lifestyle change, such as education, improved environment, reasonable nutrition, adequate amount of physical exercise and psychological support, to prevent and control high blood pressure and diabetes.This helps couples improve their quality of life and increase their chances of natural conception, or optimize their chances for conception.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"19 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140515415","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}
Numerical modelling was conducted to investigate the seismic performance at beam ends of unbonded prestressed precast concrete frames. The established finite element model was verified by the test results. Through numerical simulation, the influence of such factors as the presence or absence of energy-dissipating reinforcement, the length of the unbonded section of energy-dissipating bars, the amount of prestressed or non-prestressed reinforcement on the seismic performance at beam ends of unbonded prestressed precast concrete frames were further analyzed. The results show that all prestressed precast beam-end models have similar initial stiffness. The bearing capacity and energy-dissipating performance of beam-end models without energy-dissipating bars are the lowest. The length of the unbonded section of energy-dissipating bars has no significant effect on the bearing capacity and energy-dissipating capacity of beam-end models, though the yield displacement increases obviously with the increase of the length of the unbonded section, as the local stress of energy-dissipating bars is reduced by setting the unbonded section. The bearing capacity of beam-end models can be improved by increasing the amount of prestressed or non-prestressed reinforcement. In the case of the same amount of prestressed reinforcement, increasing the amount of energy-dissipating bars can significantly improve the energy-dissipating capacity.
{"title":"Seismic Performance at Beam Ends of Unbonded Prestressed Precast Concrete Frames","authors":"Yuchen Jiang, Jian Wang, Jiabin Wen, Haoyang Shuai, Zhijun Cheng","doi":"10.56028/aetr.9.1.289.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.289.2024","url":null,"abstract":" Numerical modelling was conducted to investigate the seismic performance at beam ends of unbonded prestressed precast concrete frames. The established finite element model was verified by the test results. Through numerical simulation, the influence of such factors as the presence or absence of energy-dissipating reinforcement, the length of the unbonded section of energy-dissipating bars, the amount of prestressed or non-prestressed reinforcement on the seismic performance at beam ends of unbonded prestressed precast concrete frames were further analyzed. The results show that all prestressed precast beam-end models have similar initial stiffness. The bearing capacity and energy-dissipating performance of beam-end models without energy-dissipating bars are the lowest. The length of the unbonded section of energy-dissipating bars has no significant effect on the bearing capacity and energy-dissipating capacity of beam-end models, though the yield displacement increases obviously with the increase of the length of the unbonded section, as the local stress of energy-dissipating bars is reduced by setting the unbonded section. The bearing capacity of beam-end models can be improved by increasing the amount of prestressed or non-prestressed reinforcement. In the case of the same amount of prestressed reinforcement, increasing the amount of energy-dissipating bars can significantly improve the energy-dissipating capacity.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140515075","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 : 2024-01-02DOI: 10.56028/aetr.9.1.257.2024
Xuehe Zhuang, Yuanhui Yu, Suyu Lan
Knowledge graph is the key technology of knowledge engineering in the era of big data. Using the powerful semantic understanding and knowledge organization ability of knowledge graph, it can be a better solution to the problems such as the disordered and over-wide coverage of knowledge related to modern Chinese history. The core of this paper is to use high-quality machine learning and deep learning algorithms with the support of big data knowledge graph to obtain the problem analysis result through natural language processing, and then match the problem analysis result with the question template to generate relevant query statements in the constructed knowledge graph to query relevant content through the knowledge graph rich semantic relations. The close relationship between the entities returns the most appropriate information for the user. The experimental results show that the designed question-and-answer system of modern Chinese history fills the gap in this field to a certain extent.
{"title":"Research on the Application of BiLSTM-CRF Model in the Field of Chinese Modern History Question-and-Answer","authors":"Xuehe Zhuang, Yuanhui Yu, Suyu Lan","doi":"10.56028/aetr.9.1.257.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.257.2024","url":null,"abstract":"Knowledge graph is the key technology of knowledge engineering in the era of big data. Using the powerful semantic understanding and knowledge organization ability of knowledge graph, it can be a better solution to the problems such as the disordered and over-wide coverage of knowledge related to modern Chinese history. The core of this paper is to use high-quality machine learning and deep learning algorithms with the support of big data knowledge graph to obtain the problem analysis result through natural language processing, and then match the problem analysis result with the question template to generate relevant query statements in the constructed knowledge graph to query relevant content through the knowledge graph rich semantic relations. The close relationship between the entities returns the most appropriate information for the user. The experimental results show that the designed question-and-answer system of modern Chinese history fills the gap in this field to a certain extent.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"50 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140515187","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}
The high proportion of renewable energy sources and intermittent loads pose challenges to the flexible operation of regional energy systems. To improve the flexible operation level of regional energy system, this paper considers the uncertainty of energy storage charging and discharging, demand-side management, and V2G of electric vehicles, and establishes a flexible resource supply capacity and cost model. With the goal of minimum flexibility demand and economic optimization, the implementation of flexible supply and demand balance constraints is added. The advantages and disadvantages of the traditional resource scheduling scheme and the unified flexible resource scheduling method are compared from the net load volatility, the maximum operating volatility and the whole time scale flexible supply and demand balance index. The algorithm analysis proves the advantages of the proposed scheduling scheme in improving the flexibility of the regional energy system, which can describe the flexibility of the regional energy system well and can be quantitatively characterized.
{"title":"Research on Regional Energy System Planning Considering Flexible Access of Electric Vehicles","authors":"Chongbiao Zhang, Chenwen Qian, Hongyan Yu, Yanling Peng, Jinwei Chen","doi":"10.56028/aetr.9.1.236.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.236.2024","url":null,"abstract":"The high proportion of renewable energy sources and intermittent loads pose challenges to the flexible operation of regional energy systems. To improve the flexible operation level of regional energy system, this paper considers the uncertainty of energy storage charging and discharging, demand-side management, and V2G of electric vehicles, and establishes a flexible resource supply capacity and cost model. With the goal of minimum flexibility demand and economic optimization, the implementation of flexible supply and demand balance constraints is added. The advantages and disadvantages of the traditional resource scheduling scheme and the unified flexible resource scheduling method are compared from the net load volatility, the maximum operating volatility and the whole time scale flexible supply and demand balance index. The algorithm analysis proves the advantages of the proposed scheduling scheme in improving the flexibility of the regional energy system, which can describe the flexibility of the regional energy system well and can be quantitatively characterized.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140515002","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 : 2024-01-02DOI: 10.56028/aetr.9.1.215.2024
He Cheng, Sipeng Hao, Jitao Zhang, Kai Xu, Yuankai Ma
The load fluctuation law remains challenging for traditional distribution line users. Furthermore, as the number of distributed photovoltaic installations connected to the distribution network rises, the issue of voltage overload on the distribution lines becomes more prevalent. This, in turn, adds complexity to power system operation. To configure the PV access location, whilst ensuring the line voltage is qualified, this paper applies the DBSCAN density clustering and K-means optimization algorithm to classify the distribution network line load. Different characteristics of the load collection are then constructed, and the concept of the load centre distance is proposed. PV access points are selected based on the load center characteristic curve and PV curve similarity. Model simulation is used to verify the conclusions, which demonstrate the rationality and effectiveness of the proposed method. The model simulation is conducted to confirm the soundness and credibility of the conclusions drawn.
{"title":"Distributed photovoltaic siting optimisation considering load centre similarity","authors":"He Cheng, Sipeng Hao, Jitao Zhang, Kai Xu, Yuankai Ma","doi":"10.56028/aetr.9.1.215.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.215.2024","url":null,"abstract":"The load fluctuation law remains challenging for traditional distribution line users. Furthermore, as the number of distributed photovoltaic installations connected to the distribution network rises, the issue of voltage overload on the distribution lines becomes more prevalent. This, in turn, adds complexity to power system operation. To configure the PV access location, whilst ensuring the line voltage is qualified, this paper applies the DBSCAN density clustering and K-means optimization algorithm to classify the distribution network line load. Different characteristics of the load collection are then constructed, and the concept of the load centre distance is proposed. PV access points are selected based on the load center characteristic curve and PV curve similarity. Model simulation is used to verify the conclusions, which demonstrate the rationality and effectiveness of the proposed method. The model simulation is conducted to confirm the soundness and credibility of the conclusions drawn.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"46 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514894","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 : 2024-01-02DOI: 10.56028/aetr.9.1.263.2024
S. Liang, Yaxin Xiao, Yiming Tan, Liang Chen
Periodontitis is a chronic inflammation of periodontal support tissue caused by local factors. Eucommia ulmoides, a traditional Chinese medicinal herb, has a significant therapeutic effect on periodontitis, but its mechanism of action is still unclear. In this study network pharmacology method was used to deeply elucidate the pharmacological substance basis and mechanism of Eucommia ulmoides in treating periodontitis. The protein interaction network (PPI) was constructed using the STRING database. The GO and KEGG signal pathway enrichment analyses of the intersected targets were performed using the DAVID database to predict the mechanism of action. The results indicate that Eucommia ulmoides exerted its therapeutic effect on periodontitis through a synergistic mechanism of multiple components, targets, and pathways. The top 8 therapeutic targets were identified, including EGFR, HIF1A, MMP9, ESR1, JUN, PPARG, AKT1, and SRC. Prolactin and HIF-1 signaling pathway may be the key mechanism of Eucommia ulmoides in treating periodontitis.
{"title":"Study on the Anti-Periodontitis Mechanism of Eucommia ulmoides Based on Network Pharmacology","authors":"S. Liang, Yaxin Xiao, Yiming Tan, Liang Chen","doi":"10.56028/aetr.9.1.263.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.263.2024","url":null,"abstract":"Periodontitis is a chronic inflammation of periodontal support tissue caused by local factors. Eucommia ulmoides, a traditional Chinese medicinal herb, has a significant therapeutic effect on periodontitis, but its mechanism of action is still unclear. In this study network pharmacology method was used to deeply elucidate the pharmacological substance basis and mechanism of Eucommia ulmoides in treating periodontitis. The protein interaction network (PPI) was constructed using the STRING database. The GO and KEGG signal pathway enrichment analyses of the intersected targets were performed using the DAVID database to predict the mechanism of action. The results indicate that Eucommia ulmoides exerted its therapeutic effect on periodontitis through a synergistic mechanism of multiple components, targets, and pathways. The top 8 therapeutic targets were identified, including EGFR, HIF1A, MMP9, ESR1, JUN, PPARG, AKT1, and SRC. Prolactin and HIF-1 signaling pathway may be the key mechanism of Eucommia ulmoides in treating periodontitis.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514694","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}
The hydration property of cement directly affects the performance index of concrete, so it is necessary to monitor the hydration setting process of cement. The aim of this paper is to monitor the process of cement hydration setting by ultrasonic wave. Ultrasonic monitoring is a kind of dynamic non-destructive testing technology, which has the advantages of real-time, on-line and continuous. In this paper, an in-situ monitoring technology of cement hydration setting based on embedded piezoelectric ceramic sensor is introduced. The monitoring results show that the amplitude change of ultrasonic signal received by the sensor can indirectly reflect the change process of cement hydration solid and liquid, especially the initial setting node has a high catching ability.
{"title":"Ultrasonic monitoring of cement setting based on embedded sensor","authors":"Xianyong Pei, Qianqian Wang, Peng Zhao, Yinghui Lv","doi":"10.56028/aetr.9.1.246.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.246.2024","url":null,"abstract":"The hydration property of cement directly affects the performance index of concrete, so it is necessary to monitor the hydration setting process of cement. The aim of this paper is to monitor the process of cement hydration setting by ultrasonic wave. Ultrasonic monitoring is a kind of dynamic non-destructive testing technology, which has the advantages of real-time, on-line and continuous. In this paper, an in-situ monitoring technology of cement hydration setting based on embedded piezoelectric ceramic sensor is introduced. The monitoring results show that the amplitude change of ultrasonic signal received by the sensor can indirectly reflect the change process of cement hydration solid and liquid, especially the initial setting node has a high catching ability.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"168 1-4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514607","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 : 2024-01-02DOI: 10.56028/aetr.9.1.269.2024
Yu Liu, Hongtao Gu, Bin Zhao, Zhiyi Leng, J. Yin, Shengfang Zhang
Hydrogen production reactor are subject to performance degradation problems in the complex environment of high temperature, high pressure and exposed to hydrogen atmosphere. The welds, being weak parts, are susceptible to fatigue damage under the influence of loads such as temperature, pressure and hydrogen penetration. In this paper, we focus on the fatigue life analysis of welds in hydrogen production reactor, taking into account the complex working conditions of thermal-mechanical-chemical coupling. Based on the Fe-safe fatigue analysis software, the stress variation of the welds under multi-field coupling was used as a cyclic load and the fatigue life was predicted using the stress-life method. Respectively, the fatigue life variation law of the weld region was studied at different temperatures, pressures, and hydrogen penetration conditions. The results show that the lowest fatigue life of the welds are concentrated in the vicinity of the fusion zone, with hydrogen penetration and temperature variations having a larger impact on the fatigue life, followed by pressure.
{"title":"Fatigue Life Analysis of Hydrogen Production Reactor Welds Under Thermal-mechanical-chemical Coupling","authors":"Yu Liu, Hongtao Gu, Bin Zhao, Zhiyi Leng, J. Yin, Shengfang Zhang","doi":"10.56028/aetr.9.1.269.2024","DOIUrl":"https://doi.org/10.56028/aetr.9.1.269.2024","url":null,"abstract":"Hydrogen production reactor are subject to performance degradation problems in the complex environment of high temperature, high pressure and exposed to hydrogen atmosphere. The welds, being weak parts, are susceptible to fatigue damage under the influence of loads such as temperature, pressure and hydrogen penetration. In this paper, we focus on the fatigue life analysis of welds in hydrogen production reactor, taking into account the complex working conditions of thermal-mechanical-chemical coupling. Based on the Fe-safe fatigue analysis software, the stress variation of the welds under multi-field coupling was used as a cyclic load and the fatigue life was predicted using the stress-life method. Respectively, the fatigue life variation law of the weld region was studied at different temperatures, pressures, and hydrogen penetration conditions. The results show that the lowest fatigue life of the welds are concentrated in the vicinity of the fusion zone, with hydrogen penetration and temperature variations having a larger impact on the fatigue life, followed by pressure.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"120 1-3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140515209","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 : 2023-09-01DOI: 10.56028/aetr.6.1.696.2023
Peilin Zhou, Peng He, Yang Cao, Liguo Wang
m-Xylylene diisocyanate (m-XDI) is a raw material wildly used in the manufacture of high value-added polyurethane products and others. m-XDI is a heat-sensitive and easily polymerized substance, and obtaining high-purity m-XDI in industry is challenging, difficult and costly. In this paper, a coupling process of crystallization distillation was proposed to meet the challenge. First, an experiment was carried out to produce a simulated liquid close to the actual pyrolysis liquid components by the reaction of XDI and ethanol. Secondly, two key factors, the final crystallization temperature and the concentration of the m-XDI reaction liquid, which have great effect on the crystallization process of the m-XDI reaction liquid, are studied. Combined with m-XDI saturated vapor pressure and m-XDI-TLB VLE data, the process of m-XDI separation by crystallization distillation coupling was simulated (as shown in the Figure 1), and the process was compared with that of m-XDI separation by distillation alone. The purity of 99.1% m-XDI was obtained by the coupled process of crystal distillation.
{"title":"Study on the Separation of M-Xdi Products by Non-Phosgene Pyrolysis System","authors":"Peilin Zhou, Peng He, Yang Cao, Liguo Wang","doi":"10.56028/aetr.6.1.696.2023","DOIUrl":"https://doi.org/10.56028/aetr.6.1.696.2023","url":null,"abstract":"m-Xylylene diisocyanate (m-XDI) is a raw material wildly used in the manufacture of high value-added polyurethane products and others. m-XDI is a heat-sensitive and easily polymerized substance, and obtaining high-purity m-XDI in industry is challenging, difficult and costly. In this paper, a coupling process of crystallization distillation was proposed to meet the challenge. First, an experiment was carried out to produce a simulated liquid close to the actual pyrolysis liquid components by the reaction of XDI and ethanol. Secondly, two key factors, the final crystallization temperature and the concentration of the m-XDI reaction liquid, which have great effect on the crystallization process of the m-XDI reaction liquid, are studied. Combined with m-XDI saturated vapor pressure and m-XDI-TLB VLE data, the process of m-XDI separation by crystallization distillation coupling was simulated (as shown in the Figure 1), and the process was compared with that of m-XDI separation by distillation alone. The purity of 99.1% m-XDI was obtained by the coupled process of crystal distillation.","PeriodicalId":355471,"journal":{"name":"Advances in Engineering Technology Research","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124947905","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}
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