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Surface activity and cleaning performance of rosin-based quaternary ammonium salt type asymmetric Gemini surfactants
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作者 Haoyu Feng Yaoqi Pan +4 位作者 Yijia Zhang Zhuofan Zhang Yunye Huang Linxi Hou Longqiang Xiao 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2024年第9期70-80,共11页
Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammoni... Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant industry.In this study,four rosin-based quaternary ammonium asymmetric gemini surfactants(RGS-2-n)with different alkyl chain lengths(n=12,14,16,18)were synthesized using a simple two-step method based on dehydroabietylamine as the raw material.The feasibility of these surfactants for cleaning purposes was comprehensively evaluated,suggesting that the surfactants own high surface activity and good cleaning performance.Furthermore,by successfully introducing the amine group of dehydroabietylamine into the hydrophilic group of the surfactants,we avoided its potential harm to the environment and water pollution.Density functional theory proves rosin-based gemini surfactants with asymmetric structure can further improve cleaning efficiency.Overall,our findings suggests that RGS-2-n surfactants are promising and sustainable candidates for cleaning electric plates,and provide new opportunities for rosin application in the electric industry. 展开更多
关键词 Electronic components Asymmetric gemini surfactants cleaning performance Rosin
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An Experimental and Numerical Study on the Cleaning of Pleated Bag Filters Using Low-Pressure Pulsed-Jets 被引量:1
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作者 Lumin Chen Wanying Sun +5 位作者 Fuping Qian Can Fang Zhimin Zheng Qianshuang Zhuang Yunlong Han Jinli Lu 《Fluid Dynamics & Materials Processing》 EI 2022年第1期41-56,共16页
Pulsed-jet cleaning is recognized as the most efficient method to regenerate bag dust collectors traditionally used in industrial processes to control the emission of particulates.In this study,non-woven needle felt f... Pulsed-jet cleaning is recognized as the most efficient method to regenerate bag dust collectors traditionally used in industrial processes to control the emission of particulates.In this study,non-woven needle felt filter bags with and without a film coating material have been analyzed considering different geometries(different number N of pairs of pleated filter bag sides)in the frame of dedicated low-pressure pulsed-jet cleaning experiments.The flow structure inside the bag and the response characteristics of its wall have also been analyzed numerically through a computational fluid-dynamics/structural-dynamics(CFD-CSD)unidirectional fluid-solid coupling method.As shown by the experiments,the peak pressure(P_(0))on the wall of the filter bag with N=8 and 12 is higher,which indicates dust can be removed more effectively in these cases.The peak pressure on the wall increases first and then decreases along the direction of the bag length,while the peak pressure of the pleated filter bag with nonwoven needled felt film coating is greater than that without film coating.A comprehensive analysis of the time variation of acceleration,deformation,strain,stress and other factors,has led to the conclusion that the pleated filter bag with N=12 would be the optimal choice. 展开更多
关键词 Pleated filter bag dust cleaning performance low-pressure pulsed-jet cleaning peak pressure unidirectional fluidstructure coupling
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Commercial Application of the XYA-5 Catalyst in Acrylonitrile Unit
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作者 Li Zhengguang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2008年第4期13-17,共5页
The XYA-5 catalyst was first applied in commercial scale on an 80-kt/a acrylonitrile unit at the Daqing Refining and Chemical Company. Test results had shown that the once-through yield of acrylonitrile exceeded 80% w... The XYA-5 catalyst was first applied in commercial scale on an 80-kt/a acrylonitrile unit at the Daqing Refining and Chemical Company. Test results had shown that the once-through yield of acrylonitrile exceeded 80% with the unit consumption ofpropylene reaching 1032 kg on each ton of acrylonitrile. The product quality could be easily put under control and the distribution of reaction products was reasonable with good cleaning performance and stability of the catalyst that was suitable for use on this commercial unit. 展开更多
关键词 ACRYLONITRILE XYA-5 catalyst YIELD QUALITY cleaning performance
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Separation and cleaning of Leymus chinensis seed threshing material based on gas-solid coupling
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作者 Zongyu Ma Qihao Wan +3 位作者 Weiwei Liu Yingzhong Zhang Ku Bu Wenliang Du 《International Journal of Agricultural and Biological Engineering》 SCIE 2023年第5期283-290,共8页
The aim of this study was to improve the cleaning performance of the Leymus chinensis seed threshing material separation and cleaning device,and to clarify the movement law and characteristics of the Leymus chinensis ... The aim of this study was to improve the cleaning performance of the Leymus chinensis seed threshing material separation and cleaning device,and to clarify the movement law and characteristics of the Leymus chinensis seed threshing material during the cleaning process.A numerical simulation of the separation and cleaning process of Leymus chinensis seed threshing material was performed using the computational fluid dynamics discrete element approach.According to the streamline distribution of the gas-solid coupling,the movement of Leymus chinensis seeds during the cleaning process was examined.Additionally,the average speed and quantity of Leymus chinensis seed threshing material in different separation and cleaning zones were studied over time.Meanwhile,the distribution principle of the threshing material was obtained,and a verification test of the under-sieve distribution was conducted.The test results showed that the numerical simulation was consistent with the distribution trend of the under-sieve.The cleaning performance verification test showed that the impurity content and the loss rate of the separation and cleaning device were 27.3%and 3.3%,where the test results,compared with those of the numerical simulation,showed a reduction of 1.5%and 0.8%,respectively.It is feasible to apply the theory and method of gas-solid coupling to simulate the separation and cleaning process of Leymus chinensis seeds. 展开更多
关键词 cleaning performance gas-solid coupling Leymus chinensis seeds numerical simulation separation and cleaning
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