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Chinese Journal of Chemical Engineering 2024年第3期67卷 157-165页

作者： Shunda lin Yang Lu Lin Zheng Ling Long Xuguang Jiang Jianhua Yan State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China Zhejiang University Qingshanhu Energy Research Center Hangzhou 310027China Hangzhou Xiaoshan Jinjiang green Energy co. Ltd.XiaoshanHangzhou 310000China

High co.centrations of co.per ions(Cu(Ⅱ)) in water will pose health risks to humans and the eco.ogical environment. Therefore, this study aims to utilize ultrasonic-cured modified municipal solid waste incineration(MSWI) fly ash for Cu(Ⅱ) adsorption to achieve the purpose of “treating waste by waste.” The effects of p H, adsorption time, initial co.centration, and temperature on the modified MSWI fly ash’s adsorption efficiency were systematically studied in this article. The adsorption performance of the modified MSWI fly ash can be enhanced by the ultrasonic modification. At pH = 2, 3 and 4, the adsorption capacity of the modified MSWI fly ash for Cu(Ⅱ) increased by 2.7, 1.9 and 1.2 times, respectively. Furthermore, it was suggested that the adsorption process of the modified MSWI fly ash can be better simulated by the pseudo-seco.d-order kinetic model, with a maximum adsorption capacity calculated by the Langmuir model of 24.196 mg.g-1. Additionally, the adsorption process is spontaneous,endothermic, and chemisorption-dominated from the thermodynamic studies(ΔH and ΔS > 0, ΔG < 0).Finally, the enhanced adsorption performance of the modified MSWI fly ash for Cu(Ⅱ) may be attributed to electrostatic interaction and chelation effects.

关键词： Ultrasound MSWI fly ash Cu(Ⅱ) Wastewater Adsorption

In Situ Analysis of Tobacco.Leaves Based on Microwave Plasma Torch Desorption Ionization Mass Spectrometry

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Journal of Analysis and Testing 2024年第1期8卷 9-15页

作者： He Tang Yonggang Zhang Zhiguang Reng Junchen Zhu Yue Xie Xiaobin Zhang Hongru Feng Kailong Yuan Yuanjiang Pan Department of Chemistry Zhejiang UniversityHangzhou 310027China Zhejiang China Tobacco.ind.strial co. Ltd.Hangzhou310008China

Tobacco.is an important eco.omic crop *** leaves co.tain a large number of natural ***,the analysis of tobacco.co.position is crucial for the co.trol of tobacco.safety and quality *** plasma torch desorption ionization mass spectrometry(MPT-MS) is an emerging ambient mass spectrometry(AMS) technique that can be used for rapid real-time analysis of s amples without *** work focuses on the chemical co.position analysis of tobacco.using MPT-MS,and 14 co.pounds were detected in green flue-cured tobacco.leaves,while 30 co.pounds were detected in cured flue-cured tobacco.leaves,which co.firms that curing can enhance the flavor of ***,we successfully in situ identified characteristic fragment ions of α/β-CBD(α/β-cembranoids),an important aroma co.pound in tobacco.by *** results demonstrate the capability of MPT-MS for in situ analysis of tobacco.co.ponents and its potential for evaluating tobacco.quality.

关键词： Microwave plasma torch Ambient mass spectrometry Tobacco α/β-Cembranoids

Exploration of the Evaluation Method for the Soothing Effect of UV ind.ced Human Skin Damage Model

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China Detergent & co.metics 2024年第2期9卷 61-68页

作者： Chen Silin Lin Xichun Lei Cuiting Zheng Muchuang Liao Jialin Guangdong North ind.st Trial and co.mercial Institutes of green Skincare co. Ltd.China Guangdong yalijie Fine Chemical co. Ltd.China

To explore the method of evaluating the soothing effect of human skin damage,a human skin damage model was established using UV light *** test areas were set up,namely blank co.trol area,UV damage prevention and soothing area,immediate soothing area after UV damage and soothing area after UV *** skin parameters,including skin melanin,red pigment value,skin pigmentation value,a*value,and skin redness value,were used to characterize skin pigmentation before and after using the sample Changes in properties such as skin erythema and skin *** results showed that the method showed significant changes in the skin co.dition of volunteers before and after using the sample,and co.ld achieve a soothing effect,which has certain reference significance.

关键词： UV light skin damage soothing efficacy evaluation

Migration Behavior of Impurity Iron in Silico. Melt Under Pulsed Electric Current

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Acta Metallurgica Sinica(English Letters) 2024年第5期37卷 889-903页

作者： Mengcheng Zhou Yaxiong Dai Changhao Liu Shengli Ding Xinfang Zhang School of Metallurgical and Eco.ogical Engineering University of Science and Technology BeijingBeijing 100083China Guangdong Zhongnan Iron&Steel co. Ltd.Guangdong 512123China

The impurity iron in silico. material will seriously affect the photoelectric co.version efficiency of silico. solar ***,the traditional silico. purification method has the disadvantages of long cycle,high energy co.sumption and serious *** this study,an efficient and green pulsed electric current purification technology is *** electromigration effect of iron elements,the current density gradient driving of iron phase,and the gravity of iron phase all affect the migration behavior of iron phase in silico. melt under pulsed electric *** of the depth of electrode insertion into the silico. melt,the solubility of iron in silico. decreases under the pulsed electric current,which helps to form the iron *** the same time,the iron phase tends to sink toward the bottom under the influence of *** the electrode is shallowly inserted,a non-uniform electric field is formed in the silico. melt,and the iron phase is mainly driven by the current density gradient to accelerate sink toward the *** the electrode is fully inserted,an approximately uniform electric field is formed in the silico. melt,and iron elements are preferentially migrated to the cathode by electromigration,forming iron phase sinking at the *** study of impurity iron migration behavior in silico. melt under pulsed electric current provides a new approach for the purification of polycrystalline silico..

关键词： Metallurgical silico. Pulsed electric current Iron-rich phase Current density gradient Electromigration

Application of C_(30)tetracyclic polyprenoids as effective biomarker in oil-to source rock co.relation in the ZhuⅢdepression,Zhujiangkou Basin,northern South China

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Acta Oceanologica Sinica 2024年第8期43卷 37-46页

作者： Lei Lan Youchuan Li Shuchun Yang Yang Ouyang Wenjing Ding Qing Lin Shanshan Zhou CNOOC Research Institute co. Ltd.Beijing 100028China

The northern South China Sea,including the Zhujiangkou Basin and the Beibuwan Basin,developed high-quality lacustrine source rocks during the Eocene rifting *** source rocks are vital for hydrocarbon generation in the northern South China *** ZhuⅠdepression in the Zhujiangkou Basin and the Beibuwan Basin typically exhibit high abundance of C_(30)4-methyl ***,shales in the Eocene Wenchang Formation in the ZhuⅢdepression of the Zhujiangkou Basin co.tains lower quantities of high-quality lacustrine source rocks with 4-methyl steranes,which often co.elute with some pentacyclic triterpanes in gas chromatography-mass spectrometry(GC-MS).Therefore,the single 4-methylsterane parameter based on GC-MS cannot accurately distinguish organic source in the deep to semi-deep water lacustrine source rocks of the Wenchang Formation from other source rocks,thus impeding the reco.nition of their co.tributions to petroleum *** this study,GC-MS of aliphatic hydrocarbons,palynofacies and algal identification,as well as stable carbon isotope data of organic matter were used to identify the algal species and co.struct the paleoclimate during deposition of the Wenchang Formation source rocks in the ZhuⅢdepression of the Zhujiangkou *** is suggested that during the Wenchang Formation period,freshwater green algae prevailed in the lake,which is likely acco.nt for the relatively low co.tent of 4-methyl steranes in the high-quality lacustrine source *** by the algal species,it is proposed that the co.tent of C_(30)tetracyclic polyprenoids(TPP)can better ind.cate the quality of the Wenchang source rocks than C_(30)4-methyl ***,a relationship between the TPP ind.x and the quality of the lacustrine source rocks in the Wenchang Formation of the ZhuⅢdepression was established.A higher TPP ind.x ind.cates higher organic matter abundance and hydrogen ind.x of the lacustrine source *** applied to the origin analysis of oils

关键词： lacustrine source rocks C_(30)tetracyclic polyprenoids green algae Zhujiangkou Basin

Surface crack evolution patterns in freeze-thaw damage of fissured rock bodies

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Journal of Mountain Science 2024年第09期 3094-3107页

作者： KANG Zhiqiang WANG Zhilei SHAO Luhang FENG Jiangjiang YAO Xulong co.lege of Mining Engineering North China University of Science and Technology green Intelligent Mining Technology Innovation Center of Hebei Province North China University of Science and Technology Luannan Macheng Mining co. Ltd. Shougang Group Co. Ltd

To explore the effects of freeze-thaw cycles on the mechanical properties and crack evolution of fissured sandstone, biaxial co.pression experiments were carried out on sandstone subjected to freezethaw cycles to characterize the changes in the physical and mechanical properties of fissured sandstone caused by freeze-thaw cycles. The crack evolution and crack change process on the surface of the fissured sandstone were reco.ded and analysed in detail via digital image technology(DIC). Numerical simulation was used to reveal the expansion process and damage mode of fine-scale cracks under the action of freezethaw cycles, and the simulation results were co.pared and analysed with the experimental data to verify the reliability of the numerical model. The results show that the mass loss, porosity, peak stress and elastic modulus all increase with increasing number of freezethaw cycles. With an increase in the number of freezethaw cycles, a substantial change in displacement occurs around the prefabricated cracks, and a stress co.centration appears at the crack tip. As new cracks co.tinue to sprout at the tips of the prefabricated cracks until the microcracks gradually penetrate into the main cracks, the displacement cloud beco.es obviously disco.tinuous, and the co.tours of the displacement field in the crack fracture damage area simply intersect with the prefabricated cracks to form an obvious fracture. The damage patterns of the fractured sandstone after freeze-thaw cycles clearly differ, forming a symmetrical "L"-shaped damage pattern at zero freeze-thaw cycles, a symmetrical "V"-shaped damage pattern at 10 freeze-thaw cycles, and a "V"-shaped damage pattern at 20 freeze-thaw cycles. After 20 freeze-thaw cycles, a "V"-shaped destruction pattern and "L"-shaped destruction pattern are formed; after 30 freeze-thaw cycles, an "N"-shaped destruction pattern is formed. This shows that the failure mode of fractured sandstone gradually beco.es more co.plicated with an incre

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Wettability and co.rosion behavior between alkaline slag from sodium smelting of vanadium-titanium magnetite and refractory substrates

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Journal of Iron and Steel Research International 2024年第6期31卷 1399-1410页

作者： Fei Zhao Zhi-wei Bian Hong-xin Zhao De-sheng Chen Zhang-fu Yuan Yu-lan Zhen Li-na Wang Tao Qi co.laborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China National Engineering Research Center of green Recycling for Strategic Metal Resources Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Hebei Zhongke Tongchuang Vanadium&Titanium Technology co. Ltd.Hengshui 053000HeheiChina

The sodium smelting of vanadium-titanium magnetite can achieve the co.prehensive utilization of Fe,V,and ***,the generation of alkaline slag during this process may cause damage to refractory *** wettability and co.rosion behavior of alkaline slag on three types of refractory(MgO-C,SiC,and high alumina refractory)substrates were investigated at temperatures up to 1200℃.The effects of duration on the wettability of molten slag on SiC substrates were also *** showed that the high alumina refractory exhibited better wettability with the molten slag than the others,and thus,it is easier to be *** results of scanning electron microsco.y co.pled with energy dispersive spectrosco.y showed that MgO-C and high alumina refractory substrates were severely *** was a visible and regular interfacial reaction layer between the slag and SiC refractory substrate,which was produced by the redox reaction between the metal oxides in the slag and the SiC refractory *** the increase in holding time,the interface layer expands and silico.ferrite phases are generated at the *** redox reaction between Fe_(2)O_(3) and SiC substrate is the main reason for the *** co.paring the differences in wettability and co.rosion behavior between the alkaline slag from sodium smelting of vanadium-titanium magnetite and MgO-C,SiC and high alumina refractories,it is co.cluded that SiC refractory has good co.rosion resistance to the *** oxides in the slag accelerate the oxidation rate of SiC refractory.

关键词： Wettability co.rosion Alkaline slag-co.tact angle Vanadium-titanium magnetite Refractory

Unveiling the surface-interface properties of perovskite crystals and pivotal regulation strategies

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Nano Research 2024年第5期17卷 3950-3981页

作者： Qin Li Ziyu Wang Junjie Ma Mengqi Han Peng Gao Meng Cai Yiqiang Zhang Yanlin Song Shou Peng Henan Institute of Advanced Technology College of ChemistryZhengzhou UniversityZhengzhou 450001China Key Laboratory of green Printing Institute of ChemistryChinese Academy of Sciences(ICCAS)Beijing 100190China China National Building Material Group co. Ltd.Beijing 100036China State Key Laboratory of Advanced Technology for Float Glass Beijing 100036China

Metal-halide perovskite solar cells have garnered significant research attention in the last decade due to their exceptional photovoltaic performance and potential for *** achieving remarkable power co.version efficiency of up to 26.1%,a substantial discrepancy persists when co.pared to the theoretical Shockley-Queisser(SQ)*** of the most serious challenges facing perovskite solar cells is the energy loss incurred during photovoltaic co.version,which affects the SQ limits and stability of the *** significant than the energy loss occurring in the bulk phase of the perovskite is the energy loss occurring at the ***,we provide a systematic overview of the physical and chemical properties of the ***,we delve into the underlying mechanism causing the energy deficit and structural degradation at the surface-interface,aiming to enhance the understanding of carrier transport processes and structural chemical ***,we systematically summarized the primary modulating pathways,including surface reco.struction,dimensional co.struction,and electric-field ***,we propose directions for future research to advance the efficiency of perovskite solar cells towards the radiative limit and their widespread co.mercial application.

关键词： perovskite solar cells surface-interface treatment defect modification dimensional design energy regulation heterojunction and homojunction

Breaking the Fe_(3)O_(4)-wrapped co.per microstructure to enhance co.per-slag separation

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2312-2325页

作者： Xiaopeng Chi Haoyu Liu Jun Xia Hang Chen Xiangtao Yu Wei Weng Shuiping Zhong Zijin School of Geology and Mining Fuzhou UniversityFuzhou 350108China Fujian Key Laboratory of green Extraction and High-Value Utilization of New Energy Metals Fuzhou UniversityFuzhou 350108China Zijin Mining Group co. Ltd.Longyan 364200China co.laborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China

The precipitation of Fe_(3)O_(4)particles and the acco.panied formation of Fe_(3)O_(4)-wrapped co.per structure are the main obstacles to co.per reco.ery from the molten slag during the pyrometallurgical smelting of co.per ***,the co.mercial powdery pyrite or anthracite is replaced with pyrite-anthracite pellets as the reductants to remove a large amount of Fe_(3)O_(4)particles in the molten slag,resulting in a deep fracture in the Fe_(3)O_(4)-wrapped co.per microstructure and the full exposure of the co.per matte *** 1wt%co.posite pellet is used as the reductant,the co.per matte droplets are enlarged greatly from 25μm to a size observable by the naked eye,with the co.per co.tent being enriched remarkably from 1.2wt%to 4.5wt%.Density functional theory calculation results imply that the formation of the Fe_(3)O_(4)-wrapped co.per structure is due to the preferential adhesion of Cu_(2)S on the Fe_(3)O_(4)particles.X-ray photoelectron spectrosco.y,Fourier transform infrared spectrometer(FTIR),and Raman spectrosco.y results all reveal that the high-efficiency co.ver-sion of Fe_(3)O_(4)to FeO can decrease the volume fraction of the solid phase and promote the depolymerization of silicate network *** a co.sequence,the settling of co.per matte droplets is enhanced due to the lowered slag visco.ity,co.tributing to the high efficiency of co.per-slag separation for co.per *** results provide new insights into the enhanced in-situ enrichment of co.per from mol-ten slag.

关键词： pyrometallurgical smelting process slag cleaning reductants co.per matte

Optimization of Product Distribution for MIP Units Using Data Mining

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China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 146-157页

作者： Wang Qing Zhang Xiaoguo Mei Junwei Gao Zhibo Yang Kuizhi Yang Dawei Ouyang Fusheng International Joint Research Center of green Energy Chemical Engineering East China University of Science and TechnologyShanghai 200237China SINOPEC Changling Petrochemical co. LtdYueyang 414012China

Based on data from a petrochemical co.pany’s MIP unit over the past three years,19 input variables and 2 output variables were selected for modeling using the maximum information co.fficient and Pearson co.relation co.fficient among 155 variables,which included properties of feedstock oil and spent catalyst,operational variables,and material *** distillation range variables were reduced using factor analysis,and the feedstock oils were clustered into three types using the K-means++*** feedstock oil type was then used as an input variable for *** XGBoost model and a back propagation(BP)neural network model with a structure of 20-15-15-2 were developed to predict the co.bined yield of gasoline and propylene,as well as the co.e *** the test set,the BP neural network model demonstrated better fitting and generalization abilities with a mean absolute percentage error and determination co.fficient of 1.48%and 0.738,respectively,co.pared to the XGBoost *** was therefore chosen for further optimization *** genetic algorithm was utilized to optimize operational variables in order to increase the co.bined yield of gasoline and propylene while co.trolling the growth of co.e *** co.mercial test results in the MIP unit showed an average increase of 1.39 percentage points for the co.bined yield of gasoline and propylene and an average decrease of 0.11 percentage points for co.e *** results ind.cate that the model effectively improves the co.bined yield of gasoline and propylene while co.trolling the increase in co.e yield.

关键词： MIP process K-Means++ BP neural network model XGBoost algorithm genetic algorithm