Chemical Engineering Journal最新文献_第4页

Development of a shear strengthening conductive hydrogel for impact protection and distress signal emission

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162280

Juan Tan, Xi Li, Chuan Ru Zheng, Anna Tan, Xiu Chen Li, Hai Liang Ni, Wen Hao Yu, Yue Feng Bai, Ping Hu, Hong Mei Chen

{"title":"Development of a shear strengthening conductive hydrogel for impact protection and distress signal emission","authors":"Juan Tan, Xi Li, Chuan Ru Zheng, Anna Tan, Xiu Chen Li, Hai Liang Ni, Wen Hao Yu, Yue Feng Bai, Ping Hu, Hong Mei Chen","doi":"10.1016/j.cej.2025.162280","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162280","url":null,"abstract":"This study presents the development of a novel hydrogel that combines shear strengthening behavior with electrical conductivity, providing dual functionalities for impact protection and distress signal emission in response to collisions. To address the challenges of cold flow and creep typically associated with conventional shear strengthening gels, a composite hydrogel was formulated using sodium alginate (SA), ethylene glycol (EG), and carbonylated multi-walled carbon nanotubes (MWCNT) within a sodium borate (SB) cross-linked polyvinyl alcohol (PVA) matrix. The incorporation of ethylene glycol not only addressed moisture evaporation but also enhanced the relative shear strengthening effect (RSTe) by an impressive 3301 %. Meanwhile, the inclusion of MWCNT provided hydrogel with a measured electrical conductivity of 7.05 mS/m. The resultant material demonstrated remarkable creep resistance and mechanical properties, achieving an energy absorption rate of up to 90 % and a buffer time of 1.23 ms. Additionally, this hydrogel has potential applications as electronic skin, enabling functionalities such as signal recognition, transmission, and early warning systems. By merging the sensing capabilities of hydrogels with their impact resistance, this innovative material paves the way for advanced intelligent protection applications.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"18 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Nitrogen-Doped tannin carbon dots anchored NiCo-LDH composites for high-performance asymmetric supercapacitors

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162275

Shirui Wang, Jianping Deng, Menghan Li, Jiande Lin, Lu Luo, Zhanhui Yuan, Wenxue Zhang, Cheng He, Guanben Du, Weigang Zhao

{"title":"Nitrogen-Doped tannin carbon dots anchored NiCo-LDH composites for high-performance asymmetric supercapacitors","authors":"Shirui Wang, Jianping Deng, Menghan Li, Jiande Lin, Lu Luo, Zhanhui Yuan, Wenxue Zhang, Cheng He, Guanben Du, Weigang Zhao","doi":"10.1016/j.cej.2025.162275","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162275","url":null,"abstract":"This study demonstrates the synthesis and application of nitrogen-doped tannin carbon dots (TCDs) derived from condensed tannin of grapestone through a single-step hydrothermal method. The TCDs were employed to enhance the electrical conductivity, active site availability, structural stability, and charge storage mechanisms of NiCo-LDH composite electrodes. Density Functional Theory (DFT) calculations reveal that the incorporation of TCDs increases the density of states (DOS) near the Fermi level, thereby improving charge transport properties and contributing to the enhanced cycling stability. In a three-electrode system, the NiCo-LDH@TCDs3.0 electrode exhibits an exceptional specific capacitance of 1804.2F g−1 at 1 A g−1, with a capacitance retention of 77.4 % at a high current densities of 10 A g−1. As button cell of asymmetric supercapacitor (ASC) assembled with tannin-based activated carbon (TAC600-4) as the negative electrode and NiCo-LDH@TCDs3.0 as the positive electrode, the device demonstrates a maximum energy density of 87 Wh kg−1 at a power density of 800 W kg−1, and maintains a high energy density of 61.6 Wh kg−1 even at an ultra-high power density of 8000 W kg−1, significantly surpassing devices composed solely of NiCo-LDH. Durability assessments further revealed 78.6 % capacitance retention and 100.9 of coulombic efficiency after 10,000 cycles, underscoring its applicability in high-performance energy storage. This study not only advances the synthesis of carbon dots from sustainable tannin sources but also provides valuable insights into optimizing the specific capacitance, rate capability, and cycling durability of LDH-based supercapacitors.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"58 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Crystallinity engineering of FexO through doping and ligand design for improved oxygen Catalysis in Zinc-Air batteries 通过掺杂和配体设计实现 FexO 结晶工程，改善锌-空气电池中的氧催化作用

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162093

Jiao Peng, Fangfang Liu, Xinjie Huang, Lijuan Feng, Hui Wang, Xuyun Wang, Jianwei Ren, Rongfang Wang

{"title":"Crystallinity engineering of FexO through doping and ligand design for improved oxygen Catalysis in Zinc-Air batteries","authors":"Jiao Peng, Fangfang Liu, Xinjie Huang, Lijuan Feng, Hui Wang, Xuyun Wang, Jianwei Ren, Rongfang Wang","doi":"10.1016/j.cej.2025.162093","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162093","url":null,"abstract":"The crystallinity of metal oxides plays a pivotal role in regulating the arrangement of metal atoms and thereby influencing electrocatalytic performance. This study focuses on carbon-supported transition metal oxide catalysts (V-FexO/NC) and investigates how improved crystallinity impacts their performance in both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). It is demonstrated that doping with vanadium (V) and introducing nitrogen-containing ligands enhance the crystallinity of FexO nanoparticles in the V-FexO/NC catalyst. The high crystallinity of FexO facilitates efficient electron transfer within the material and sequentially resulting in superior electrical conductivity. Furthermore, electron paramagnetic resonance (EPR) analysis suggests a lower concentration of oxygen vacancies in V-FexO/NC sample, attributed to the well-ordered crystalline structure of FexO, which minimizes internal defects and improves catalyst stability. As a result, the V-FexO/NC composite demonstrates exceptional electrocatalytic efficiency, evidenced by a potential gap of merely 0.64 V, which surpasses the performance of the Pt/C + RuO2 catalyst (0.66 V), while also exhibiting outstanding durability in both ORR and OER processes. Zinc-air batteries incorporated with V-FexO/NC exhibit a stable open-circuit voltage (1.46 V) and high specific capacity (743.0 mAh g−1).","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"75 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Mechanisms of arsenic oxidation and immobilization by structural and surface iron-modified nontronite

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162212

Ji-Hyun Park, Dong Yun Shin, Dong-Hee Lim, Jin Young Kim, Young Heon Kim, Eun-Ji Bae, Young-Soo Han

{"title":"Mechanisms of arsenic oxidation and immobilization by structural and surface iron-modified nontronite","authors":"Ji-Hyun Park, Dong Yun Shin, Dong-Hee Lim, Jin Young Kim, Young Heon Kim, Eun-Ji Bae, Young-Soo Han","doi":"10.1016/j.cej.2025.162212","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162212","url":null,"abstract":"Iron (Fe)-bearing clay minerals, which occur naturally, play a significant role as removal agents in the immobilization of redox-sensitive pollutants like arsenic (As) from natural soil environments. However, the effects of the structural position of Fe within the 2:1 clay mineral on the removal and transformation of contaminants are poorly understood. In this study, nontronite NAu-1 was transformed into redox-activated clay minerals by modifying the oxidation states of structural or surface Fe to investigate the mechanisms of As immobilization. The mineralogical, chemical, and spectroscopic properties of the redox-activated nontronite (RAN) were characterized, and the reaction mechanisms for the removal of As were investigated. X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy confirmed the Fe presence in di- or trioctahedral domains and Fe(II)/Fe(III) ratios. Following the reaction with aqueous As and various RANs, limitations in the As oxidation on structural Fe(II) and Fe(III) RANs were observed; however, improved As removal was observed in the presence of adsorbed Fe(II) on nontronite surface. Notably, the re-oxidized Fe(II)-reduced nontronite exhibited the highest As(III) oxidation capability, demonstrating the potential for As reactivity via redox-activated nontronite. In addition, density functional theory (DFT) calculations, through adsorption energy calculation and excess Bader charge analysis, demonstrated the positive effect of adsorbed Fe(II) on nontronite surface in facilitating As oxidation. This study proposes the development of eco-friendly adsorbents through redox activation of natural clays, providing fundamental insights into the mobility and fate of redox-sensitive elements, including metal(loid)s and radioactive elements","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"183 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Dual oxygen modulation approach through basicity enhancement and vacancy engineering for high-efficiency CO2 reduction in solid oxide electrolysis cells

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162268

Zhen Liu, Xiaoxia Yang, Chunming Xu, Yixin Lu, Zhenhua Wang, Jinshuo Qiao, Wang Sun, Kening Sun

{"title":"Dual oxygen modulation approach through basicity enhancement and vacancy engineering for high-efficiency CO2 reduction in solid oxide electrolysis cells","authors":"Zhen Liu, Xiaoxia Yang, Chunming Xu, Yixin Lu, Zhenhua Wang, Jinshuo Qiao, Wang Sun, Kening Sun","doi":"10.1016/j.cej.2025.162268","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162268","url":null,"abstract":"Solid oxide electrolysis cells (SOECs) offer significant potential for the efficient and low-cost conversion of CO2 into valuable chemical fuels. However, the inadequate stability and electro-catalytic activity of cathode towards the CO2 reduction reaction (CO2RR) hamper its further development and application. Herein, Nb element is introduced and used to modify the Sr2Fe1.5Mo0.5O6-δ matrix perovskite oxide. Notably, a single cell with Sr2Fe1.5Mo0.4Nb0.1O6-δ cathode exhibits significantly enhanced current density of 2.20 A cm−2 at 1.6 V and 800 ℃ for CO2 electrolysis and exhibits good stability after 160 h continuous test. The improvement originates from the synergistic interplay between optimized lattice oxygen basicity and increased oxygen vacancy concentration induced by the lower electronegativity of Nb incorporation. Density Functional Theory calculations further confirm the formation energy of oxygen vacancies is reduced and the energy barrier for CO2 adsorption/dissociation is lowered after Nb doping, thereby realizing the faster CO2 reduction reaction kinetics.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"32 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Converting static to Dynamic: Biomimetic Ultra-Sensitive Wide-Range flexible pressure sensor inspired by the Contact-Regulation process of scorpion pectines

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162055

Junqiu Zhang, Jiachao Wu, Lili Liu, Xiangbo Gu, Xueping Zhang, Xueyang Li, Zijian Shi, Yu Chen, Jiqi Gao, Junfeng Zhang, Tao Sun, Honglie Song, Bo Li, Ze Wang, Qingqing Dai, Zhiwu Han, Luquan Ren, Qiao Lin

{"title":"Converting static to Dynamic: Biomimetic Ultra-Sensitive Wide-Range flexible pressure sensor inspired by the Contact-Regulation process of scorpion pectines","authors":"Junqiu Zhang, Jiachao Wu, Lili Liu, Xiangbo Gu, Xueping Zhang, Xueyang Li, Zijian Shi, Yu Chen, Jiqi Gao, Junfeng Zhang, Tao Sun, Honglie Song, Bo Li, Ze Wang, Qingqing Dai, Zhiwu Han, Luquan Ren, Qiao Lin","doi":"10.1016/j.cej.2025.162055","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162055","url":null,"abstract":"Flexible pressure sensors play an irreplaceable role in emerging fields. However, achieving high sensitivity across a wide range on flexible pressure sensors has been proven challenging due to the limited deformation space and rapid hardening of microstructures, confining their operation to laboratory settings. Coincidentally, facing the similar dilemma, scorpions depend on comb-like pectines sensitively perceiving various pressure signals from the surroundings. Here, we have discovered that this excellent mechanosensory function is originated from the synergy of the dynamic regulation process of multiscale architecture and viscoelastic material of pectines. Inspired by this distinct strategy rather than traditional design focusing on static factors, we propose a pectines-inspired flexible pressure sensor simultaneously achieving ultrahigh sensitivity and broad detection range. The dynamic process of the pectines is introduced into sensor design in static form via the protrusion-curved surface sensing unit arrays with gradient heights, effectively averting the rapid stiffening of microstructures. Therefore, this sensor exhibits high sensitivity (8.24 kPa−1) over a broad detection range (98 Pa-700 kPa), demonstrating the sensor’s potential in human signals detection, robotic arm operation monitoring, and high-resolution pressure measurement. This work provides a static and dynamic switching concept for unlocking promising new capabilities in application platforms of flexible pressure sensors.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"183 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Novel solid-solution catalysts for the CVD synthesis of hollow graphene nanospheres: Enabling efficient hydrogenation catalysis

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162273

Jian Zhou, Hong Wang, Junlei Tang, Taigang Zhou

{"title":"Novel solid-solution catalysts for the CVD synthesis of hollow graphene nanospheres: Enabling efficient hydrogenation catalysis","authors":"Jian Zhou, Hong Wang, Junlei Tang, Taigang Zhou","doi":"10.1016/j.cej.2025.162273","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162273","url":null,"abstract":"The development of heterogeneous catalysts with high activity is highly desired for hydrogenation reactions, where the catalyst support plays a crucial role in enhancing the activity of hydrogenation catalysts. In this study, a novel hollow graphene nanosphere (HGS) with open pores was synthesized via chemical vapor deposition (CVD) using Mg0.91Fe0.09O and Mg0.9Mn0.1O solid-solution catalysts for the first time. The growth mechanism of HGS was elucidated through detailed characterization of the catalyst and HGS. It was found that the in situ formation of solid solutions during the CVD process is the key to HGS growth. The unique pore structures and high surface area of HGS made it an excellent catalyst support. A Ru/HGS catalyst was prepared via impregnation and evaluated for the hydrogenation of 1-methylindole (NMID). Ru/HGS exhibits superior catalytic performance (TOF = 75.6 min−1), surpassing commercial Ru/Al2O3 (TOF = 41.8 min−1). The activation energy for NMID hydrogenation using Ru/HGS was determined to be 41.7 kJ/mol, significantly lower than the 80.7 kJ/mol for Ru/Al2O3. The catalyst characterization analysis and DFT calculations reveal that Ru nanoparticles on HGS were smaller, better dispersed, and formed stronger interactions with the support, enhancing NMID adsorption and hydrogen activation, particularly on the Ru(101) surface, which explained the superior catalytic performance of Ru/HGS over Ru/Al2O3. Furthermore, the Ru/HGS catalyst demonstrated broad applicability and high efficiency in hydrogenating various N-heterocyclic compounds, including quinoline, pyridine, and indole derivatives. This study introduces a new strategy for designing advanced catalysts with enhanced efficiency for hydrogenation.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"24 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Innovative approaches in skin therapy: The rise of organoid cultivation

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162248

Runji Zhou, Xin Luo, Shaokun Chen, Keran Jia, Hong Yu, Ziteng Huang, Yadan Tan, Mingyi Ma, Jiao Zhao, Jinshan Xing, Jingyan Yi

{"title":"Innovative approaches in skin therapy: The rise of organoid cultivation","authors":"Runji Zhou, Xin Luo, Shaokun Chen, Keran Jia, Hong Yu, Ziteng Huang, Yadan Tan, Mingyi Ma, Jiao Zhao, Jinshan Xing, Jingyan Yi","doi":"10.1016/j.cej.2025.162248","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162248","url":null,"abstract":"The skin is a complex organ system that plays a critical role in maintaining tissue homeostasis, providing defense mechanisms, and facilitating wound repair. Its structure is distinctly organized into three primary layers, each of which is integral to barrier functions against pathogen invasion and protection. Additionally, the skin contains various appendages, including hair follicles, sweat glands, sebaceous glands, nails, and mammary glands, which collectively contribute to the comprehensive skin system. These structures hold significant implications for the treatment of skin-related diseases, wound healing, and regenerative medicine. Organoids are models that simulate the complexity of natural tissues through three-dimensional cell culture techniques, typically derived from stem cells, primary tissues, or pluripotent stem cells. They can self-organize to replicate key structures responsible for organ physiological functions. Skin organoids, constructed using 3D culture systems, are cell models that mimic the skin structure, capable of precisely recapitulating the physiological and pathological states of the skin and its appendages. Despite their immense potential in disease modeling, drug screening, and skin regeneration, challenges such as morphological instability, functional decline, and discrepancies with human skin remain to be addressed. This review will explore the construction methodologies of skin and appendage organoids, with an emphasis on their potential applications in skin-related diseases.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"8 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Corrigendum to “Spinel-type high-entropy oxides for enhanced oxygen evolution reaction activity in anion exchange membrane water electrolyzers” [Chem. Eng. J. 507 (2025) 160641]

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.161785

Manuela Montalto, Williane da Silva Freitas, Emanuela Mastronardo, Valerio C.A. Ficca, Ernesto Placidi, Vincenzo Baglio, Erminia Mosca, Carmelo Lo Vecchio, Irene Gatto, Barbara Mecheri, Alessandra D’Epifanio

引用次数: 0

A simple analytical equation to assess the probe effect on Spaci-MS data: Computational and experimental validation for the redox kinetics of low-T NH3-SCR over a Cu-CHA monolith catalyst

IF 15.1 1区工程技术

Chemical Engineering Journal Pub Date : 2025-04-02 DOI: 10.1016/j.cej.2025.162101

Pietro De Angeli, Aldo Lanza, Nicola Usberti, Isabella Nova, Enrico Tronconi, Roberta Villamaina, Maria Pia Ruggeri, Djamela Bounechada, Andrew York, Tomáš Hlavatý, Petr Kočí

{"title":"A simple analytical equation to assess the probe effect on Spaci-MS data: Computational and experimental validation for the redox kinetics of low-T NH3-SCR over a Cu-CHA monolith catalyst","authors":"Pietro De Angeli, Aldo Lanza, Nicola Usberti, Isabella Nova, Enrico Tronconi, Roberta Villamaina, Maria Pia Ruggeri, Djamela Bounechada, Andrew York, Tomáš Hlavatý, Petr Kočí","doi":"10.1016/j.cej.2025.162101","DOIUrl":"https://doi.org/10.1016/j.cej.2025.162101","url":null,"abstract":"Spatially resolved Mass Spectrometry (Spaci-MS) is a powerful tool for the study of chemical processes over honeycomb monolith catalysts, the commercial configuration of catalytic converters for pollutant abatement from combustion exhausts. A limit of this technology lies in the intrinsic perturbation of the measurements caused by the mass spectrometry probe: the insertion of the capillary affects the flow distribution in the probed monolith channel due to the incremented flow resistance, altering the catalyst contact time and thus the measured catalytic activity. In this work, we study the effect of the probe on the spatially resolved low temperature DeNOx activity of a model Cu-CHA NH3-SCR catalyst. Transient tests were performed to calibrate a redox model of the investigated catalyst, incorporating Cu site reduction (RHC, CuII → CuI) and oxidation (OHC, CuI → CuII) kinetics. Then, the simulated axial evolution of NO conversion (validated by tests performed in a conventional flow reactor at increasing space velocity) was compared to spatially resolved data obtained in a Spaci-MS rig to capture the effect of the probe. Based on this comparison, a simple analytical formula was developed to directly assess a priori the effect of the diameter, sampling flowrate and eccentricity of the Spaci-MS capillary probe. The equation was successfully validated against both CFD simulations and the experimental NH3-SCR activity data.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"34 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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