Pub Date : 2023-01-01DOI: 10.1051/matecconf/202337805007
Thamer Almotlaq, M. Saafi
This paper focuses on sustainable cementitious composites in terms of their conductivity, hydration and self-sensing properties, which are key features for smart city infrastructures. Smart cities have massive infrastructures that are interconnected, transmitting data and information for health-monitoring and performance optimization. In this regard, having them made of sustainable building materials (concrete) that are also sufficiently conductive, will be a suitable solution for structures’ performance. The studied sustainable cementitious mixtures are made by sea components (sea water and sea sand), which are abundant resources. The primary goal of this study is to improve the mixes’ electrical conductivity and sensitivity. To achieve this goal, milled carbon fibres (MCFs) and chopped carbon fibres (CCFs) in 6 different proportions were added to the cementitious mixes. The experimental study is divided into impedance spectroscopy to study the conductivity and hydration development, and self-sensing properties, conducted on various mix designs. The results show that incorporating sea components improve the electrical conductivity of the mixes by 40-50%. Further improvements were achieved by adding MCF as it shows a remarkable reduction by 60% compared to the plain ss-sw (sea sand and sea water) samples. Adding CCF improved the conductivity even further and resulted in sample’s resistivity as low as 53 Ωcm after 1 year of curing time.
{"title":"Self-sensing Sustainable Cementitious Mixtures Incorporating Carbon Fibres","authors":"Thamer Almotlaq, M. Saafi","doi":"10.1051/matecconf/202337805007","DOIUrl":"https://doi.org/10.1051/matecconf/202337805007","url":null,"abstract":"This paper focuses on sustainable cementitious composites in terms of their conductivity, hydration and self-sensing properties, which are key features for smart city infrastructures. Smart cities have massive infrastructures that are interconnected, transmitting data and information for health-monitoring and performance optimization. In this regard, having them made of sustainable building materials (concrete) that are also sufficiently conductive, will be a suitable solution for structures’ performance. The studied sustainable cementitious mixtures are made by sea components (sea water and sea sand), which are abundant resources. The primary goal of this study is to improve the mixes’ electrical conductivity and sensitivity. To achieve this goal, milled carbon fibres (MCFs) and chopped carbon fibres (CCFs) in 6 different proportions were added to the cementitious mixes. The experimental study is divided into impedance spectroscopy to study the conductivity and hydration development, and self-sensing properties, conducted on various mix designs. The results show that incorporating sea components improve the electrical conductivity of the mixes by 40-50%. Further improvements were achieved by adding MCF as it shows a remarkable reduction by 60% compared to the plain ss-sw (sea sand and sea water) samples. Adding CCF improved the conductivity even further and resulted in sample’s resistivity as low as 53 Ωcm after 1 year of curing time.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90372540","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 : 2023-01-01DOI: 10.1051/matecconf/202338001009
Zhiqiang Wan, Qingqing Zhang
A CNC machine tool for machining designed to facilitate the replacement of cutting tools includes a workbench, a motor and a hydraulic cylinder. The inner bearing of the workbench is connected with a rotating rod, the outer key of the rotating rod is connected with a half gear, and the output end of the motor is connected with the lower end of the rotating rod. The CNC machine tool for machining, which is convenient for replacing cutting tools, realizes the linkage between the cutting tool body and the adjusting gear by using the tooth block, and drives the adjusting rod to move by using the rotation of the screw rod to adjust the position between the pawl and the ratchet teeth. The rotation of the adjusting gear is limited by using the pawl and the ratchet teeth, so as to lock the cutting tool body and quickly disassemble and install the cutting tool body.
{"title":"Design of a NC machine tool for machining that is easy to change cutting tools","authors":"Zhiqiang Wan, Qingqing Zhang","doi":"10.1051/matecconf/202338001009","DOIUrl":"https://doi.org/10.1051/matecconf/202338001009","url":null,"abstract":"A CNC machine tool for machining designed to facilitate the replacement of cutting tools includes a workbench, a motor and a hydraulic cylinder. The inner bearing of the workbench is connected with a rotating rod, the outer key of the rotating rod is connected with a half gear, and the output end of the motor is connected with the lower end of the rotating rod. The CNC machine tool for machining, which is convenient for replacing cutting tools, realizes the linkage between the cutting tool body and the adjusting gear by using the tooth block, and drives the adjusting rod to move by using the rotation of the screw rod to adjust the position between the pawl and the ratchet teeth. The rotation of the adjusting gear is limited by using the pawl and the ratchet teeth, so as to lock the cutting tool body and quickly disassemble and install the cutting tool body.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78359413","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 : 2023-01-01DOI: 10.1051/matecconf/202337809003
Daniel Lahmann, S. Kessler
Autogenous self-healing of water retaining concrete structures is included in Eurocode 1992-3 as a possibility to heal cracks up to a width of 200 μm without additional repair. In this self-healing scenario water flow through a crack should result in a progressive closure of the fracture, mainly due to CaCO3 precipitation, when certain hydraulic gradients are met, the pH of the water is > 5.5 and the concentration of CO2 in the water remains < 40 mg*L-1. The material composition is not further restricted by the regulation. However, despite standardization, the healing effect seems to be random in practice, which requires further research, while experiments aimed at quantifying autogenous self-healing are expensive and time-consuming. Thermodynamic models could support in estimating the effect of different environments such as groundwater or seawater exposure on autogenous self-healing. Moreover, adjusting the water chemistry according to the conditions of different construction sites and changing the material design could easily be considered. In this study thermodynamic models of a hydrated CEM I 52.5 R paste that is exposed to either simulated groundwater or seawater are discussed concerning the influence on autogenous self-healing and compared to experimental and literature data.
欧洲规范1992-3中包含了自愈水混凝土结构的可能性，即愈合宽度达200 μm的裂缝而无需额外修复。在这种自愈情景中，水流通过裂缝会导致裂缝逐渐闭合，这主要是由于CaCO3的沉淀，当满足一定的水力梯度时，水的pH值> 5.5，水中CO2浓度保持在< 40 mg*L-1。该法规没有进一步限制材料成分。然而，尽管标准化，但在实践中愈合效果似乎是随机的，这需要进一步研究，而旨在量化自愈的实验既昂贵又耗时。热力学模型可支持估算不同环境(如地下水或海水)对自愈的影响。此外，还可以考虑根据不同施工场地的条件调整水化学成分，改变材料设计。本研究讨论了水合CEM I 52.5 R膏体暴露于模拟地下水或海水中的热力学模型，并与实验和文献数据进行了比较。
{"title":"Limits and possibilities of thermodynamic modelling of autogenous self-healing of concrete","authors":"Daniel Lahmann, S. Kessler","doi":"10.1051/matecconf/202337809003","DOIUrl":"https://doi.org/10.1051/matecconf/202337809003","url":null,"abstract":"Autogenous self-healing of water retaining concrete structures is included in Eurocode 1992-3 as a possibility to heal cracks up to a width of 200 μm without additional repair. In this self-healing scenario water flow through a crack should result in a progressive closure of the fracture, mainly due to CaCO3 precipitation, when certain hydraulic gradients are met, the pH of the water is > 5.5 and the concentration of CO2 in the water remains < 40 mg*L-1. The material composition is not further restricted by the regulation. However, despite standardization, the healing effect seems to be random in practice, which requires further research, while experiments aimed at quantifying autogenous self-healing are expensive and time-consuming. Thermodynamic models could support in estimating the effect of different environments such as groundwater or seawater exposure on autogenous self-healing. Moreover, adjusting the water chemistry according to the conditions of different construction sites and changing the material design could easily be considered. In this study thermodynamic models of a hydrated CEM I 52.5 R paste that is exposed to either simulated groundwater or seawater are discussed concerning the influence on autogenous self-healing and compared to experimental and literature data.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78549284","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 : 2023-01-01DOI: 10.1051/matecconf/202337802009
H. Hermawan, M. M. Tezer, W. Verstraete, N. De Belie, P. Serna, E. Gruyaert
Although steel reinforcements are used to withstand tensile forces in concrete, cracks are an unavoidable phenomenon. The presence of cracks, in fact, increases the risk for lowering the service life and durability of concrete structures. A critical issue occurs when due to splitting forces, cracks appear in concrete along the tensioned rebars which damage the bonding between the steel and concrete matrix. As a mitigation plan, the cracks should be healed at short notice and the bonding has to be recovered by the potential use of healing agents. This paper aims to investigate the bond behaviour of steel reinforcement in self-healing concrete. Two biomasses were employed as healing agents namely HTN (bacteria-based) and YEAST (fungi-based). The fresh and hardened properties of the normal and self-healing concretes were initially evaluated. The bond properties were investigated by performing pull-out tests on three different states of concrete: uncracked, cracked, and healed. Results revealed that the additions of biomasses did not induce negative effects on the compressive strength of hardened concrete. Moreover, the average bond strength of uncracked concretes containing HTN and YEAST improved by 20% and 8%, respectively, as compared with normal concrete. The introduction of a crack caused a significant reduction in bond strength regardless of the addition of healing agents. Nevertheless, it was found that the bond strength was slightly recovered after healing under water immersion.
{"title":"Bond behaviour evaluation between steel reinforcement and self-healing concrete containing non-axenic biomasses","authors":"H. Hermawan, M. M. Tezer, W. Verstraete, N. De Belie, P. Serna, E. Gruyaert","doi":"10.1051/matecconf/202337802009","DOIUrl":"https://doi.org/10.1051/matecconf/202337802009","url":null,"abstract":"Although steel reinforcements are used to withstand tensile forces in concrete, cracks are an unavoidable phenomenon. The presence of cracks, in fact, increases the risk for lowering the service life and durability of concrete structures. A critical issue occurs when due to splitting forces, cracks appear in concrete along the tensioned rebars which damage the bonding between the steel and concrete matrix. As a mitigation plan, the cracks should be healed at short notice and the bonding has to be recovered by the potential use of healing agents. This paper aims to investigate the bond behaviour of steel reinforcement in self-healing concrete. Two biomasses were employed as healing agents namely HTN (bacteria-based) and YEAST (fungi-based). The fresh and hardened properties of the normal and self-healing concretes were initially evaluated. The bond properties were investigated by performing pull-out tests on three different states of concrete: uncracked, cracked, and healed. Results revealed that the additions of biomasses did not induce negative effects on the compressive strength of hardened concrete. Moreover, the average bond strength of uncracked concretes containing HTN and YEAST improved by 20% and 8%, respectively, as compared with normal concrete. The introduction of a crack caused a significant reduction in bond strength regardless of the addition of healing agents. Nevertheless, it was found that the bond strength was slightly recovered after healing under water immersion.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78728033","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 : 2023-01-01DOI: 10.1051/matecconf/202337904005
G. Hétreux, Lise Mallier
The introduction of Renewable and Recoverable Energies (R&R) into the energy mix is one of the major levers for reducing CO2 emissions, particularly for heat production. For To this end, energy systems must be put in place based in particular on innovative thermal storage technologies. The purpose of this communication is to present the MERLIN modelling/optimization environment (Hétreux G., 2022) which offers software components allowing the development of applications to help with dimensioning and operational management of multi-energy systems. By way of illustration, these tools are implemented through the study of a system composed of a concentrated solar power plant and a storage used to supply hot air to a food drying oven.
{"title":"Development of an EMS dedicated to the control of a solar power plant, coupled with a thermal battery","authors":"G. Hétreux, Lise Mallier","doi":"10.1051/matecconf/202337904005","DOIUrl":"https://doi.org/10.1051/matecconf/202337904005","url":null,"abstract":"The introduction of Renewable and Recoverable Energies (R&R) into the energy mix is one of the major levers for reducing CO2 emissions, particularly for heat production. For To this end, energy systems must be put in place based in particular on innovative thermal storage technologies. The purpose of this communication is to present the MERLIN modelling/optimization environment (Hétreux G., 2022) which offers software components allowing the development of applications to help with dimensioning and operational management of multi-energy systems. By way of illustration, these tools are implemented through the study of a system composed of a concentrated solar power plant and a storage used to supply hot air to a food drying oven.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76956186","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 : 2023-01-01DOI: 10.1051/matecconf/202337806002
Davide di Summa, Yasmina Shields, V. Cappellesso, L. Ferrara, N. De Belie
Among the various possibilities to tackle the issue of concrete damage within its structural service life, the biomimetic approach has favoured the development of innovative solutions such as the use of 3D printed vascular networks suitably incorporated into concrete structural elements to inject and convey the most suitable healing agent upon crack occurrence. These systems, able to cope with damage of different intensities, may lead to improvements of the structure’s durability, through the closure of cracks, and a consequent reduction of the frequency of major maintenance activities. The present work investigates the environmental sustainability of the aforesaid self-healing technology through a Life Cycle Assessment (LCA) analysis. The attention has been also focused on the 3D printing process of the network due to the key role that it could play, in terms of environmental burdens, when upscaled to real-life size applications. The case study of a beam healed by means of polyurethane injected through the network and exposed to a chloride environment is reported to better predict the potential improvements in terms of overall durability and consequent sustainability within the pre-defined service life.
{"title":"The sustainability profile of a biomimetic 3D printed vascular network to restore the structural integrity of concrete","authors":"Davide di Summa, Yasmina Shields, V. Cappellesso, L. Ferrara, N. De Belie","doi":"10.1051/matecconf/202337806002","DOIUrl":"https://doi.org/10.1051/matecconf/202337806002","url":null,"abstract":"Among the various possibilities to tackle the issue of concrete damage within its structural service life, the biomimetic approach has favoured the development of innovative solutions such as the use of 3D printed vascular networks suitably incorporated into concrete structural elements to inject and convey the most suitable healing agent upon crack occurrence. These systems, able to cope with damage of different intensities, may lead to improvements of the structure’s durability, through the closure of cracks, and a consequent reduction of the frequency of major maintenance activities. The present work investigates the environmental sustainability of the aforesaid self-healing technology through a Life Cycle Assessment (LCA) analysis. The attention has been also focused on the 3D printing process of the network due to the key role that it could play, in terms of environmental burdens, when upscaled to real-life size applications. The case study of a beam healed by means of polyurethane injected through the network and exposed to a chloride environment is reported to better predict the potential improvements in terms of overall durability and consequent sustainability within the pre-defined service life.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73951134","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 : 2023-01-01DOI: 10.1051/matecconf/202337805006
C. Vlachakis, Yen-Fang Su, A. Al-Tabbaa
In the field of structural health monitoring, self-sensing cementitious binders have gained great attention over the past decades due to their high sensing performance and durability. In particular, self-sensing cementitious coatings have seen increased interest due to their high compatibility with concrete structures and their ability to monitor existing infrastructure while using low amounts of material and at lower costs. Geopolymer coatings display favorable characteristics for this application due to their innate electrical properties and high bond strength with concrete structures. Despite the research that has been carried out on self-sensing coatings, the effect of the interfacial bond between the coating and substrate on the coating’s sensing performance has not been investigated. Poor bonding between the two materials can lead to low-quality sensing measurements and data misinterpretation. In this paper, we aim to investigate the bonding effect on the sensing performance of self-sensing geopolymer coatings. For this study fly ash-metakaolin geopolymer coatings were applied onto concrete substrates; the concrete surfaces were treated by employing three different surface preparation methods: mechanical brooming, chemical treatment and the untreated cast surface. The bond strength for each preparation technique was measured with the splitting tensile bond test and the sensing response for the geopolymer coatings under repeated loading was also characterized. Through proper understanding of the interface between cementitious materials, sensing coatings can be tailored accordingly to achieve high sensing performance and thus allowing high-quality monitoring and proactive maintenance in civil infrastructure.
{"title":"Investigation of the interfacial bonding effect on self-sensing cementitious coatings for infrastructure monitoring","authors":"C. Vlachakis, Yen-Fang Su, A. Al-Tabbaa","doi":"10.1051/matecconf/202337805006","DOIUrl":"https://doi.org/10.1051/matecconf/202337805006","url":null,"abstract":"In the field of structural health monitoring, self-sensing cementitious binders have gained great attention over the past decades due to their high sensing performance and durability. In particular, self-sensing cementitious coatings have seen increased interest due to their high compatibility with concrete structures and their ability to monitor existing infrastructure while using low amounts of material and at lower costs. Geopolymer coatings display favorable characteristics for this application due to their innate electrical properties and high bond strength with concrete structures. Despite the research that has been carried out on self-sensing coatings, the effect of the interfacial bond between the coating and substrate on the coating’s sensing performance has not been investigated. Poor bonding between the two materials can lead to low-quality sensing measurements and data misinterpretation. In this paper, we aim to investigate the bonding effect on the sensing performance of self-sensing geopolymer coatings. For this study fly ash-metakaolin geopolymer coatings were applied onto concrete substrates; the concrete surfaces were treated by employing three different surface preparation methods: mechanical brooming, chemical treatment and the untreated cast surface. The bond strength for each preparation technique was measured with the splitting tensile bond test and the sensing response for the geopolymer coatings under repeated loading was also characterized. Through proper understanding of the interface between cementitious materials, sensing coatings can be tailored accordingly to achieve high sensing performance and thus allowing high-quality monitoring and proactive maintenance in civil infrastructure.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74944184","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 : 2023-01-01DOI: 10.1051/matecconf/202338001002
Yuanyuan Yang, Ligang Qiang, Yong Zhang, Xudong Yang
Part palletizing packaging is an important part of the logistics industry. Traditional manual palletizing can no longer meet today’s order volume. In order to improve the production efficiency of the palletizing process, a part flexible palletizing system was designed. The S7-1200 PLC was used as the controller, and the high-precision altimeter and length measurement photoelectric sensors were used to check the parts in real time, and the manipulator and the end actuator were used for grasping and stacking. The end actuator with multi-axis synchronous control technology is adopted to realize simultaneous grasping of multiple boxes of different specifications, which greatly improves the production efficiency and automation level of part palletizing. This flexible palletizing system and robotic gripping technology greatly improves the efficiency of gripping small objects and also allows for extended applications in the field of FAST disassembly and handling robots.
{"title":"Design of Parts Flexible Palletizing System","authors":"Yuanyuan Yang, Ligang Qiang, Yong Zhang, Xudong Yang","doi":"10.1051/matecconf/202338001002","DOIUrl":"https://doi.org/10.1051/matecconf/202338001002","url":null,"abstract":"Part palletizing packaging is an important part of the logistics industry. Traditional manual palletizing can no longer meet today’s order volume. In order to improve the production efficiency of the palletizing process, a part flexible palletizing system was designed. The S7-1200 PLC was used as the controller, and the high-precision altimeter and length measurement photoelectric sensors were used to check the parts in real time, and the manipulator and the end actuator were used for grasping and stacking. The end actuator with multi-axis synchronous control technology is adopted to realize simultaneous grasping of multiple boxes of different specifications, which greatly improves the production efficiency and automation level of part palletizing. This flexible palletizing system and robotic gripping technology greatly improves the efficiency of gripping small objects and also allows for extended applications in the field of FAST disassembly and handling robots.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75262130","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 : 2023-01-01DOI: 10.1051/matecconf/202337907003
Lucille Payet, Elieta Carlu, Léo Pasquier, C. Debard
In the current context of energy transition, industry has a major role to play. In France, it represents 20% of overall energy consumption, with a predominantly carbon-based energy mix (Fig. 1). To decarbonize French industry, the first lever is therefore to reduce this energy consumption by working on energy efficiency and process optimization. In order to pursue their decarbonization roadmap, manufacturers will have to act on their energy mix. In France, very low-carbon electricity opens up a real opportunity for the electrification of thermal processes. Since electrification cannot concern all uses, carbon-free gases will also play a crucial role in this energy transition. As such, the ALLICE Alliance has investigated these two decarbonization pathways for its members in two in-depth studies on the subject ([1] and [2]). This article highlights the main results of these two studies, each of which is the subject of public summaries [3].
{"title":"Potential for the integration of alternative energies in the process industry","authors":"Lucille Payet, Elieta Carlu, Léo Pasquier, C. Debard","doi":"10.1051/matecconf/202337907003","DOIUrl":"https://doi.org/10.1051/matecconf/202337907003","url":null,"abstract":"In the current context of energy transition, industry has a major role to play. In France, it represents 20% of overall energy consumption, with a predominantly carbon-based energy mix (Fig. 1). To decarbonize French industry, the first lever is therefore to reduce this energy consumption by working on energy efficiency and process optimization. In order to pursue their decarbonization roadmap, manufacturers will have to act on their energy mix. In France, very low-carbon electricity opens up a real opportunity for the electrification of thermal processes. Since electrification cannot concern all uses, carbon-free gases will also play a crucial role in this energy transition. As such, the ALLICE Alliance has investigated these two decarbonization pathways for its members in two in-depth studies on the subject ([1] and [2]). This article highlights the main results of these two studies, each of which is the subject of public summaries [3].","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75816362","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 : 2023-01-01DOI: 10.1051/matecconf/202337401004
Qinisani Gazu, Mzamo L. Shozi, P. Mpungose
CeO2, Cu0.05Ce0.95O2-δ, Ni0.04Ce0.96O2-δ, Cu0.05Ni0.05Ce0.90O2-δ, catalysts were synthesised via solution combustion technique using urea as a fuel. The as pre-preared catalysts were characterised via X-ray powder diffraction, Brunauer-Emmett-Teller surface area analysis, transmission and scanning electron microscopy analysis. The characterisation techniques strongly suggested that all the catalysts were prepared successfully, and that copper and nickel were successfully incorporated into the lattice structure of ceria. The effect of the reaction conditions on the catalytic properties of the synthesised material were studied in detail using Cu0.05Ni0.05Ce0.90O2-δ as the model catalyst. The effect of temperature, solvents and co-oxidants was investigated in optimisation studies. A combination of acetonitrile, tert-butyl hydroperoxide and a temperature of 60 °C were found to be optimal after 24 hours and used for all catalysts. All catalysts were found to be active in styrene oxidation under these conditions, with styrene conversion as high as 69% over Ni0.04Ce0.96O2-δ, and selectivity to benzaldehyde and styrene oxide 38 and 26% respectively.
{"title":"Oxidation of styrene to benzaldehyde and styrene oxide over nickel and copper ceria solution combustion catalysts","authors":"Qinisani Gazu, Mzamo L. Shozi, P. Mpungose","doi":"10.1051/matecconf/202337401004","DOIUrl":"https://doi.org/10.1051/matecconf/202337401004","url":null,"abstract":"CeO2, Cu0.05Ce0.95O2-δ, Ni0.04Ce0.96O2-δ, Cu0.05Ni0.05Ce0.90O2-δ, catalysts were synthesised via solution combustion technique using urea as a fuel. The as pre-preared catalysts were characterised via X-ray powder diffraction, Brunauer-Emmett-Teller surface area analysis, transmission and scanning electron microscopy analysis. The characterisation techniques strongly suggested that all the catalysts were prepared successfully, and that copper and nickel were successfully incorporated into the lattice structure of ceria. The effect of the reaction conditions on the catalytic properties of the synthesised material were studied in detail using Cu0.05Ni0.05Ce0.90O2-δ as the model catalyst. The effect of temperature, solvents and co-oxidants was investigated in optimisation studies. A combination of acetonitrile, tert-butyl hydroperoxide and a temperature of 60 °C were found to be optimal after 24 hours and used for all catalysts. All catalysts were found to be active in styrene oxidation under these conditions, with styrene conversion as high as 69% over Ni0.04Ce0.96O2-δ, and selectivity to benzaldehyde and styrene oxide 38 and 26% respectively.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74073225","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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