Industrial & Engineering Chemistry Research最新文献_第9页

Porous Carbon Nanorods Encapsulating Bismuth Nanoparticles Promote p-Si Nanowire Array for Photoelectrocatalytic CO2 Reduction to Formate

IF 4.2 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-09 DOI: 10.1021/acs.iecr.4c03361

Yuanyuan Chen, Jihu Kang, Mingyue Zou, Keke Wang, Min Liu, Wenzhang Li

{"title":"Porous Carbon Nanorods Encapsulating Bismuth Nanoparticles Promote p-Si Nanowire Array for Photoelectrocatalytic CO2 Reduction to Formate","authors":"Yuanyuan Chen, Jihu Kang, Mingyue Zou, Keke Wang, Min Liu, Wenzhang Li","doi":"10.1021/acs.iecr.4c03361","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03361","url":null,"abstract":"Photoelectrocatalytic reduction of carbon dioxide to high value-added chemicals is one of the effective means to reduce greenhouse gas emissions and alleviate the energy crisis. In this study, porous carbon nanorods encapsulating bismuth (Bi) nanoparticles were synthesized using a metal–organic framework (MOF)-assisted spatial confinement and high-temperature carbonization strategy and then modified on silicon nanowires to construct a Si–Bi@Cx composite photocathode. The presence of the plasmonic metal Bi enhances the light absorption and improves the selectivity of carbon dioxide reduction products as reactive substances. At −0.9 V vs RHE, the Si–Bi@C800 photocathode achieves a faradaic efficiency for formic acid (FEHCOOH) of up to 91.23%, with a production rate of 88.5 μmol·h–1·cm–2. Further experimental analysis and in situ infrared spectroscopy results showed that the porous carbon nanorods with strong hydrophobicity not only reduce the contact between the electrode and water and inhibit the occurrence of the hydrogen evolution reaction but also accelerate the mass transfer of CO2 molecules and increase the local CO2 concentration. Simultaneously, Bi nanoparticles promote the formation of the *OCHO intermediate and realize the efficient conversion of CO2 to formic acid. This study lays a foundation for constructing active sites on silicon-based semiconductors.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"28 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling the Multiplicity of Silica Nanoparticles in Improving the Laser Powder Bed Fusion Processability of Polypropylene Copolymer 揭示二氧化硅纳米颗粒在改善聚丙烯共聚物激光粉末床熔融加工性能中的多重作用

IF 4.2 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-09 DOI: 10.1021/acs.iecr.4c03966

Xing Wang, Siying Xiang, Zhengze Wang, Minzhe Peng, Guangxian Li, Yajiang Huang

{"title":"Unveiling the Multiplicity of Silica Nanoparticles in Improving the Laser Powder Bed Fusion Processability of Polypropylene Copolymer","authors":"Xing Wang, Siying Xiang, Zhengze Wang, Minzhe Peng, Guangxian Li, Yajiang Huang","doi":"10.1021/acs.iecr.4c03966","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03966","url":null,"abstract":"Polypropylene (PP) copolymer powder usually displays low laser absorbance and inferior laser powder bed fusion (PBF-LB) additive manufacturing processability. Herein, hydrophobic silica nanoparticles (NPs), which are generally used as flow aids to coat powders, were in-particle compounded into PP particles and were found to cause an unexpected upgrade in the PBF-LB processability of PP powder. PP powders with minute amounts (∼0.3 wt %) of in-particle compounded silica NPs exhibited a largely reduced zero-shear viscosity (∼45%), a broadened sintering window, and stronger laser heating behavior. As a result, the PP powder was fabricated successfully into parts with fewer defects, better shape accuracy, and higher mechanical performance. The new phenomena observed were interpreted in terms of better fusion due to abnormal rheological behavior and improved laser absorbance in the presence of trace silica NPs. Therefore, this study unleashed the multiplicity and enormous potential of silica NPs in developing new feedstocks for PBF-LB.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"7 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of Single Droplet Deformation and Breakup in Shear Flow by the Phase-Field Lattice Boltzmann Method

IF 3.8 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-09 DOI: 10.1021/acs.iecr.4c0270010.1021/acs.iecr.4c02700

Baolong Li, Huahai Zhang, Shaotong Fu, Weite Su, Yufei Wang and Limin Wang*,

{"title":"Simulation of Single Droplet Deformation and Breakup in Shear Flow by the Phase-Field Lattice Boltzmann Method","authors":"Baolong Li, Huahai Zhang, Shaotong Fu, Weite Su, Yufei Wang and Limin Wang*, ","doi":"10.1021/acs.iecr.4c0270010.1021/acs.iecr.4c02700","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c02700https://doi.org/10.1021/acs.iecr.4c02700","url":null,"abstract":"The deformation and breakup of droplets, which affect droplet size and their size distributions, are of great significance in liquid–liquid two-phase systems. However, the understanding of deformation and breakup for droplets is still limited. In this work, the dynamic behavior of a single droplet under laminar shear flow was investigated by the phase-field lattice Boltzmann method. The effects of the capillary number, Reynolds number, wall confinement, droplet diameter, and viscosity ratio on droplet deformation and breakup were systematically studied. Numerical results found that the same capillary number led to different droplet breakups; thus, another important criterion, the dynamic pressure exerted on droplets, should be considered and quantitatively calculated. The compromise-in-competition between dynamic pressure and cohesive stresses in droplet breakup was thoroughly considered. It was found that droplets tend to break up more rapidly when dynamic pressure significantly exceeds cohesive stresses, which agreed well with the simulated results by the phase-field lattice Boltzmann model.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"63 50","pages":"22104–22117 22104–22117"},"PeriodicalIF":3.8,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142843077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activation of Photo-Fenton-like Process Catalyzed by Fe3+-IDS under Visible LED Light Irradiation

IF 3.8 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-09 DOI: 10.1021/acs.iecr.4c0313210.1021/acs.iecr.4c03132

Prisco Prete, Marco Visconti, Olga Sacco*, Vincenzo Vaiano, Vincenzo Venditto and Raffaele Cucciniello*,

{"title":"Activation of Photo-Fenton-like Process Catalyzed by Fe3+-IDS under Visible LED Light Irradiation","authors":"Prisco Prete, Marco Visconti, Olga Sacco*, Vincenzo Vaiano, Vincenzo Venditto and Raffaele Cucciniello*, ","doi":"10.1021/acs.iecr.4c0313210.1021/acs.iecr.4c03132","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03132https://doi.org/10.1021/acs.iecr.4c03132","url":null,"abstract":"This study is focused on the effect of the light source (LEDs emitting visible and UV-A light) on the activation of photo-Fenton processes for the Fe3+-iminodisuccinic acid/H2O2 catalytic system. The catalyst enables visible light for the hydroxyl radical’s formation by H2O2 conversion. This study shows, for the first time, the central role of visible light to accelerate the process kinetics favoring the complete degradation of a probe molecule ([gallic acid] = 25.0 mg L–1 (0.147 mM)), in water solutions in 90 min using a [H2O2]/catalyst molar ratio (R) of 75, in comparison with data obtained under dark conditions (99% under visible radiation vs 67% in dark conditions). A kinetic model able to correlate the electrical nominal power of the used LEDs, the light absorption properties of Fe3+-iminodisuccinic acid (Fe-IDS), and LEDs emission spectra was developed to estimate the degradation kinetic constants for the process in dark conditions and in the presence of light. The accuracy of the calculated kinetic constants was tested under different R values to verify the predictive ability of the model. A very good agreement between the experimental data and the mathematical model calculations was achieved. These results highlight the promising use of the Fe-IDS catalyst for environmental remediation considering low energy consumption conditions. A reasonable explanation is that the presence of Fe-IDS significantly promoted the generation of reactive oxygen species using visible light and H2O2, which led to gallic acid removal.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"63 50","pages":"21794–21804 21794–21804"},"PeriodicalIF":3.8,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bubble Formation from a Submerged Microcapillary Nozzle in Novec 649

IF 4.2 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-09 DOI: 10.1021/acs.iecr.4c03391

Hongchi Yao, Jing Luo, Yong Xu, Hongtao Liu, Jiguo Tang

{"title":"Bubble Formation from a Submerged Microcapillary Nozzle in Novec 649","authors":"Hongchi Yao, Jing Luo, Yong Xu, Hongtao Liu, Jiguo Tang","doi":"10.1021/acs.iecr.4c03391","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03391","url":null,"abstract":"Bubble formation in liquids is ubiquitous in nature and in various industrial processes, playing a crucial role in water electrolysis, chemical reaction, and boiling. This study investigates bubble formation from submerged microcapillary nozzles in Novec 649, an advanced dielectric fluid with a low global warming potential and toxicity. The behaviors and detachment parameters of the bubbles are analyzed under various gas flow rates and nozzle diameters. We create a bubbling regime map for bubble formation in Novec 649 and develop a scaling law to predict the transition from bubbling without coalescence to bubbling with coalescence by using Weber and Bond numbers. Force analysis reveals that in Novec 649, drag and liquid inertia forces are more significant in bubble detachment compared to bubble formation in water, attributed to its higher density and lower surface tension. Additionally, we develop a new force balance model and a new explicit approximate model to predict the bubble detachment diameter in Novec 649, considering the impact of the waiting time and liquid velocity around the bubble. These models outperform previous models for the experimental data of Novec 649. This study contributes to enhancing our understanding of the dynamics of bubble formation in novel liquids.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"1 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bubble Formation from a Submerged Microcapillary Nozzle in Novec 649

IF 3.8 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-09 DOI: 10.1021/acs.iecr.4c0339110.1021/acs.iecr.4c03391

Hongchi Yao, Jing Luo, Yong Xu, Hongtao Liu and Jiguo Tang*,

{"title":"Bubble Formation from a Submerged Microcapillary Nozzle in Novec 649","authors":"Hongchi Yao, Jing Luo, Yong Xu, Hongtao Liu and Jiguo Tang*, ","doi":"10.1021/acs.iecr.4c0339110.1021/acs.iecr.4c03391","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03391https://doi.org/10.1021/acs.iecr.4c03391","url":null,"abstract":"Bubble formation in liquids is ubiquitous in nature and in various industrial processes, playing a crucial role in water electrolysis, chemical reaction, and boiling. This study investigates bubble formation from submerged microcapillary nozzles in Novec 649, an advanced dielectric fluid with a low global warming potential and toxicity. The behaviors and detachment parameters of the bubbles are analyzed under various gas flow rates and nozzle diameters. We create a bubbling regime map for bubble formation in Novec 649 and develop a scaling law to predict the transition from bubbling without coalescence to bubbling with coalescence by using Weber and Bond numbers. Force analysis reveals that in Novec 649, drag and liquid inertia forces are more significant in bubble detachment compared to bubble formation in water, attributed to its higher density and lower surface tension. Additionally, we develop a new force balance model and a new explicit approximate model to predict the bubble detachment diameter in Novec 649, considering the impact of the waiting time and liquid velocity around the bubble. These models outperform previous models for the experimental data of Novec 649. This study contributes to enhancing our understanding of the dynamics of bubble formation in novel liquids.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"63 50","pages":"22166–22176 22166–22176"},"PeriodicalIF":3.8,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid Synthesis of Defect-Free Tubular Co-Gallate MOF Membranes for MeOH/MTBE Separation by Pervaporation

IF 4.2 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-08 DOI: 10.1021/acs.iecr.4c03471

Guoshu Gao, Yumeng Zhao, Peng Zhu, Haiou Liu, Xiongfu Zhang, Yu Guo, Guohui Yang

{"title":"Rapid Synthesis of Defect-Free Tubular Co-Gallate MOF Membranes for MeOH/MTBE Separation by Pervaporation","authors":"Guoshu Gao, Yumeng Zhao, Peng Zhu, Haiou Liu, Xiongfu Zhang, Yu Guo, Guohui Yang","doi":"10.1021/acs.iecr.4c03471","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c03471","url":null,"abstract":"The Co-gallate MOF membrane exhibits great potential for separating MeOH/MTBE mixtures due to its regular pore size, exceptional stability, and high hydrophilicity. Nevertheless, the rapid nucleation and growth rate of the Co-gallate crystals in the synthesis solution cause poor nucleation on the substrate surface, which presents a significant challenge for the preparation of continuous Co-gallate membranes. In this study, we presented a cobalt carbonate hydroxide nanowire array (Co-NWA)-induced strategy that enabled the rapid and defect-free synthesis of tubular Co-gallate membranes within just 1 h. The presynthesized Co-NWAs on the substrate played as nucleation centers and anchoring sites, facilitating robust membrane formation. The effects of various synthesis parameters on the crystal morphology and membrane compactness were systematically examined. The optimized Co-gallate membrane demonstrated excellent pervaporation performance, with a permeation flux of 2.03 kg m–2 h–1 and a separation factor of 6711 for a 14.3/85.7 wt % MeOH/MTBE mixture, maintaining high performance for over 100 h, indicative of its remarkable long-term stability. This Co-NWA-induced synthesis strategy presents a promising approach for the industrial-scale application of Co-gallate MOF membranes and the design of other MOF membranes, thereby advancing their utility in requisite liquid separation processes.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"12 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142789769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bubbles in Sand-Fluidized Bed Gasifiers: Bubble Motion under Inherent Conditional Randomness

IF 4.2 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-08 DOI: 10.1021/acs.iecr.4c02336

Nicolas Torres Brauer, Hugo de Lasa

{"title":"Bubbles in Sand-Fluidized Bed Gasifiers: Bubble Motion under Inherent Conditional Randomness","authors":"Nicolas Torres Brauer, Hugo de Lasa","doi":"10.1021/acs.iecr.4c02336","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c02336","url":null,"abstract":"Fluidized biomass gasification can be employed for agricultural waste conversion, including the production of syngas and biochar. Syngas is a valuable, renewable, and clean energy source, while biochar is a good supplement for soil remineralization. Fluidized bed biomass gasifiers are strongly influenced in their performance by bubble flow dynamics. In 2023, Chemical Reactor Engineering Centre (CREC) researchers, at the University of Western Ontario, introduced a phenomenological probabilistic predictive model (PPPM), which takes into consideration bubble motion randomness, and it was established on the basis of both theoretical principles and experimental data. Computational particle fluid dynamics (CPFD), and in particular, a multiphase particle-in-cell (MP-PIC) model, are considered in the present study to predict bubble sizes, bubble velocities, and bed pressure drops. MP-PIC simulations, yielding bubble rising velocity (BRV) and bubble axial chord (BAC) data, based on more than a +80,000 bubble population were considered to confirm inherently constrained bubble randomness motion. Results show that even if there are unavoidable and random variations in local bed density, bubble motion, and bubble interactions, simulated bubbles consistently fall within MP-PIC behavioral bands. It is anticipated that the observed fluid dynamic probabilistic trends, as obtained with both the MP-PIC and the PPPM, could be used in the future to improve sand-fluidized bed drag correlations and the scale-up of lab-scale gasifiers for agricultural waste gasification while accounting for the unavoidable conditional inherent randomness in bubble motion.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"20 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulating Titanium Species on TS-1 Zeolites by Na+ for Liquid-Phase Epoxidation of Propylene and H2O2

IF 4.2 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-08 DOI: 10.1021/acs.iecr.4c02047

Yue Li, Yanhui Yi, Bize Gao, Tian Mi, Rujing Pei, Yitong Guo, Jing Liu, Dan Xu, Guoxing Wu, Zhaochi Feng, Hongchen Guo

{"title":"Regulating Titanium Species on TS-1 Zeolites by Na+ for Liquid-Phase Epoxidation of Propylene and H2O2","authors":"Yue Li, Yanhui Yi, Bize Gao, Tian Mi, Rujing Pei, Yitong Guo, Jing Liu, Dan Xu, Guoxing Wu, Zhaochi Feng, Hongchen Guo","doi":"10.1021/acs.iecr.4c02047","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c02047","url":null,"abstract":"This paper focuses on the hydrothermal modification of as-synthesized TS-1 zeolites with Na+ ion-containing TPAOH solutions. The effects of NaNO3 dosage, TPAOH concentration, and modification time are investigated in detail. Multiple techniques including XRD, XRF, transmission electron microscopy, Ar physisorption, FT-IR (skeletal vibration and hydroxyl stretching), UV–vis, and UV–Raman (excited by 257 and 266 nm laser lines, respectively) are employed to characterize the parent zeolites and their modified catalyst samples, with emphasis on revealing the changes of both the microenvironment and coordination state of titanium species in the modified zeolites. Besides, propylene and H2O2 liquid-phase epoxidation is used as a probe reaction to evaluate the catalytic performance of the modified catalysts, which is carried out in both the batch reactor and fixed-bed reactor. Results show that the hydrothermal modification of the TS-1 zeolite with a Na+ ion-containing TPAOH solution is a very useful method to simultaneously regulate the microenvironment and coordination state of titanium species as well as the diffusivity of the micropore in the TS-1 zeolite and, therefore, to remarkably improve its selectivity and catalytic activity.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"90 1","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulating Titanium Species on TS-1 Zeolites by Na+ for Liquid-Phase Epoxidation of Propylene and H2O2

IF 3.8 3区工程技术

Industrial & Engineering Chemistry Research Pub Date : 2024-12-08 DOI: 10.1021/acs.iecr.4c0204710.1021/acs.iecr.4c02047

Yue Li, Yanhui Yi*, Bize Gao, Tian Mi, Rujing Pei, Yitong Guo, Jing Liu, Dan Xu, Guoxing Wu, Zhaochi Feng and Hongchen Guo*,

{"title":"Regulating Titanium Species on TS-1 Zeolites by Na+ for Liquid-Phase Epoxidation of Propylene and H2O2","authors":"Yue Li, Yanhui Yi*, Bize Gao, Tian Mi, Rujing Pei, Yitong Guo, Jing Liu, Dan Xu, Guoxing Wu, Zhaochi Feng and Hongchen Guo*, ","doi":"10.1021/acs.iecr.4c0204710.1021/acs.iecr.4c02047","DOIUrl":"https://doi.org/10.1021/acs.iecr.4c02047https://doi.org/10.1021/acs.iecr.4c02047","url":null,"abstract":"This paper focuses on the hydrothermal modification of as-synthesized TS-1 zeolites with Na+ ion-containing TPAOH solutions. The effects of NaNO3 dosage, TPAOH concentration, and modification time are investigated in detail. Multiple techniques including XRD, XRF, transmission electron microscopy, Ar physisorption, FT-IR (skeletal vibration and hydroxyl stretching), UV–vis, and UV–Raman (excited by 257 and 266 nm laser lines, respectively) are employed to characterize the parent zeolites and their modified catalyst samples, with emphasis on revealing the changes of both the microenvironment and coordination state of titanium species in the modified zeolites. Besides, propylene and H2O2 liquid-phase epoxidation is used as a probe reaction to evaluate the catalytic performance of the modified catalysts, which is carried out in both the batch reactor and fixed-bed reactor. Results show that the hydrothermal modification of the TS-1 zeolite with a Na+ ion-containing TPAOH solution is a very useful method to simultaneously regulate the microenvironment and coordination state of titanium species as well as the diffusivity of the micropore in the TS-1 zeolite and, therefore, to remarkably improve its selectivity and catalytic activity.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"63 50","pages":"21681–21695 21681–21695"},"PeriodicalIF":3.8,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0