Article
Engineering, Chemical
Mouad Hachhach, Vincenzo Russo, Dmitry Yu. Murzin, Tapio Salmi
Summary: This study aimed to develop a general heterogeneous multiscale model for continuous trickle bed reactors, enabling calculation of concentration and temperature changes as well as the stationary behavior. The model simultaneously solved energy and mass balances for both gas and liquid phases, as well as stagnant catalyst particles. Well-established correlations for mass transfer coefficients and pressure drop equations were used. The model is general and can be applied for other bed reactors and arbitrary reaction schemes. Simulation results showed that complete sugar conversion was achieved only for small catalyst particles, and the reactor length had a greater impact on arabinose conversion than residence time or bed radius.
Review
Chemistry, Multidisciplinary
Abbas Azarpour, Nima Rezaei, Sohrab Zendehboudi
Summary: Trickle-bed reactors are widely used in industry, with significant progress in design and control, but further improvements are needed to enhance performance and efficiency, leading to reduced operation costs.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Chemical
Ashutosh Yadav, Sangram Roy
Summary: The development of a mixing cell network model for commercial diesel hydrodesulphurization process in a trickle bed reactor accurately simulates the industrial unit's performance, accounting for major hydrotreating reactions and showing efficacy in simulating multiple reactions in real industrial scenarios while aligning with plant data.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Agricultural Engineering
Nabin Aryal, Mikkel Odde, Cecilie Bogeholdt Petersen, Lars Ditlev Morck Ottosen, Michael Vedel Wegener Kofoed
Summary: The study demonstrates the methanation and upgrading of syngas to biomethane in a fed-batch trickle-bed reactor system using manure or sludge-based inoculum. Addition of exogenous H2 allows for further upgrading of syngas to biomethane in the same reactors, showing functional redundancy among microbial communities.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Lei Xing, Richard C. Darton, Aidong Yang
Summary: This study examines the enhanced weathering process using fresh water in a packed bed, finding that the capture rate is mainly limited by the transfer of CO2 and the dissolution rate of calcite. Possible solutions to improve efficiency and reduce energy consumption are proposed.
Article
Engineering, Chemical
Juan B. Restrepo, Johnnys A. Bustillo, Antonio J. Bula, Carlos D. Paternina
Summary: This paper discusses the importance of propylene glycol as well as the simulation and dimensioning of a trickle bed reactor. The study found that adding mass transfer to the model significantly improves glycerol conversion rates.
Article
Engineering, Environmental
Sambit Dutta, Hariklia N. Gavala, Ioannis Skiadas
Summary: This study aims to develop a model to simulate the mass transfer of gases to the liquid phase, as well as a model to predict the volumetric mass transfer coefficient of specific gases under different flow rates and reactor configurations. The models were validated using experimental data and the predicted kLa values had a reasonable range of error.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Akarsha Srivastava, Krishna Nigam, Shantanu Roy
Summary: Trickle bed reactors, widely used in the process and refining industry, are being challenged to provide solutions for deep processing of feedstocks. This study quantifies the impact of packed bed structure on reactor hydrodynamics and discusses the effects of different packing techniques and liquid distribution on overall performance metrics.
Article
Engineering, Chemical
Run Guo, Bin Wei, Xingying Lan, Jinsen Gao, Xiaogang Shi
Summary: The flow behavior of liquid film in trickle bed reactors was studied, revealing that liquid tends to accumulate on the contact point between adjacent particles. Increasing the liquid inlet flow rate can improve both the wetting ratio and thickness of the particle surface wetted by the liquid film, while increasing the wettability of the particle surface only improves the wetting ratio, with little effect on the liquid film thickness.
Article
Engineering, Environmental
Hiba R. Mohammed, Saba A. Gheni, Khaleel I. Hamad, Safaa M. R. Ahmed, Omar A. Habeeb, Marwan A. Mahmood
Summary: The lifetime of ODS catalysts is extended by impregnating activated carbon prepared from biowaste with Mn and coating it with aluminum oxide, showing high removal efficiency for n-butyl mercaptan in a trickle bed reactor.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Green & Sustainable Science & Technology
Dominik Andreides, Dominik Stransky, Jana Bartackova, Dana Pokorna, Jana Zabranska
Summary: This study investigated the effect of different temperatures on the biomethanation of Syngas and found that CH4 production increased with increasing temperature. The CH4 production under hyper-mesophilic conditions was comparable to thermophilic conditions, resulting in potential energy savings and reduced operating costs.
Article
Thermodynamics
Panagiotis Tsapekos, Laura Treu, Stefano Campanaro, Victor B. Centurion, Xinyu Zhu, Maria Peprah, Zengshuai Zhang, Panagiotis G. Kougias, Irini Angelidaki
Summary: This study demonstrates the production of high-purity methane through biological CO2 hydrogenation under real environmental conditions with a trickle bed reactor. The microbial community in the reactor showed distinct clustering characteristics, with different layers of packing material and liquid phase having varying effects on the reaction process.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Chemical
Haoan Fan, Zhecheng Fang, Xuezhi Zhao, Yangyang Hu, Bolong Li, Wulong Yang, Mian Li, Jianghao Wang, Xiuyang Lu, Weiyu Song, Jie Fu
Summary: This study proposes a viable continuous approach for maltose hydrogenation using a millimeter-scale Raney Ni in a trickle-bed reactor. The optimal reaction conditions were determined through a parametric study, resulting in high conversion of maltose and yield of maltitol. A detailed investigation of the reaction mechanism and the utilization of biomass-derived sugars demonstrates the potential of the continuous flow system based on a trickle-bed reactor in industrial applications.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Konstantinos Asimakopoulos, Martin Kaufmann-Elfang, Christoffer Lundholm-Hoffner, Niels B. K. Rasmussen, Antonio Grimalt-Alemany, Hariklia N. Gavala, Ioannis Skiadas
Summary: By comparing the performance of different scale reactors, it was found that the novel semi-pilot scale reactor had a higher efficiency in converting syngas to methane under identical operating conditions.
Article
Energy & Fuels
Run Guo, Bin Wei, Huanzhi Liu, Xiaogang Shi, Xingying Lan, Jinsen Gao
Summary: This study conducted experimental research to investigate the impact of gas/liquid velocity, particle packing method, and liquid properties on the characteristics of liquid dispersion in a pseudo-two-dimensional trickle bed reactor. By utilizing a high-speed camera system and an image processing method, the researchers were able to record and quantify the liquid flow and distribution in the reactor. The combination of qualitative information from liquid distribution images and quantitative information from particle surface wetting efficiency allowed for a detailed evaluation of liquid dispersion in the trickle bed reactor.
Article
Chemistry, Physical
Lorena M. Polo, Ignacio Elizalde, Fabian S. Mederos, Fernando Trejo, Edgar Ramirez, J. Felipe Sanchez
REACTION KINETICS MECHANISMS AND CATALYSIS
(2020)
Article
Chemistry, Physical
Ma. Elena Manriquez-Ramirez, Ignacio Elizalde, Roman Ramirez-Lopez, Martin Trejo-Valdez, Miriam Estrada-Flores
REACTION KINETICS MECHANISMS AND CATALYSIS
(2020)
Article
Environmental Sciences
Gurusamy Kutralam-Muniasamy, Fermin Perez-Guevara, I Elizalde-Martinez, V. C. Shruti
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
V. C. Shruti, Fermin Perez-Guevara, I Elizalde-Martinez, Gurusamy Kutralam-Muniasamy
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Chemistry, Physical
Ma. Elena Manriquez-Ramirez, Ignacio Elizalde, Emma Ortiz-Islas
REACTION KINETICS MECHANISMS AND CATALYSIS
(2020)
Article
Environmental Sciences
V. C. Shruti, Fermin Perez-Guevara, Priyadarsi D. Roy, I Elizalde-Martinez, Gurusamy Kutralam-Muniasamy
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Review
Environmental Sciences
Gurusamy Kutralam-Muniasamy, Fermin Perez-Guevara, I Elizalde-Martinez, V. C. Shruti
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Review
Environmental Sciences
Gurusamy Kutralam-Muniasamy, Fermin Perez-Guevara, I. Elizalde-Martinez, V. C. Shruti
ENVIRONMENTAL POLLUTION
(2020)
Article
Chemistry, Physical
Luis A. Soto-Azuara, Roman Ramirez-Lopez, Ma. del Carmen Monterrubio-Badillo, Ignacio Elizalde
Summary: The mathematical modeling of hydrocracking kinetics of a heavy oil fraction was studied using the discrete lumping approach. Six reaction rate models were developed, which showed close agreement with experimental data.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Maricruz Morales-Blancas, Fabian S. Mederos-Nieto, Ignacio Elizalde, J. Felipe Sanchez-Minero, Fernando Trejo-Zarraga
Summary: The hydrotreating of a mixture of Fluid Catalytic Cracking feedstock and light gas oil was studied, and the kinetic models for hydrodesulfuration and hydrocracking were determined using a batch reactor system and commercial alumina NiMo supported catalyst.
Article
Environmental Sciences
V. C. Shruti, Gurusamy Kutralam-Muniasamy, Fermin Perez-Guevara, Priyadarsi D. Roy, I Elizalde-Martinez
Summary: Microplastics were detected in 100% of the evaluated ice cube samples, with concentrations ranging from 19 to 178 L-1. The microplastic concentration varied significantly across samples, and the main types found were polypropylene, polyethylene, polyvinyl alcohol, tygon polymer, sealing ring gardena 2824 large, polyamide 6, and cellophane. The study estimated that ice cube consumption in Mexico City could lead to the inadvertent ingestion of a large number of microplastics annually, highlighting the need for management and eradication of this contamination in our food.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Physical
Roman Ramirez-Lopez, Ignacio Elizalde
Summary: This study simulates the transesterification of triolein in a batch reactor with a heterogenous catalyst. The simulation considers different levels of temperature, catalyst concentration, and concentrations of intermediaries and final products. The results show that reducing the catalyst concentration has the most significant effect on the production of methyl oleate, followed by temperature, while increasing the concentration of intermediaries and products has no appreciable effect on biodiesel production. The developed reactor model accurately predicts the viscosity and density profiles relevant to the mechanical design of the reactor.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2023)
Article
Energy & Fuels
Alejandro Ramirez-Estrada, Violeta Y. Mena-Cervantes, Ignacio Elizalde-Martinez, Gabriel Pineda-Flores, Raul Hernandez-Altamirano
Summary: The aim of this study was to remove hemicellulose and lignin from corncob using chemical pretreatments, and investigate their effects on the composition, microstructure, and thermal properties of corncob. The biomass was pretreated with H2SO4 and NaOH solutions to dissolve hemicellulose and lignin. The acid pretreatment disrupted the hemicellulose structure by hydrolysis of glycoside bonds, while the lignin was removed during alkaline pretreatment by solvation of aryl groups.
Article
Environmental Sciences
Gurusamy Kutralam-Muniasamy, V. C. Shruti, Fermin Perez-Guevara, Priyadarsi D. Roy, I. Elizalde Martinez
Summary: This study is the first in Latin America to demonstrate the contamination of dried fish with microplastics for human consumption, highlighting the need for countermeasures to prevent plastic pollution and reduce human exposure to these micropollutants in fishery regions.
ENVIRONMENTAL POLLUTION
(2023)
Article
Chemistry, Multidisciplinary
Sergio Diaz-Garcia, Manuel A. Hernandez-Cortazar, Gabriel Pineda-Flores, Ignacio Elizalde
Summary: The experiments showed that a stoichiometric or higher dose of alkali was needed to remove almost 100% of Cr3+; there was a nonlinear relationship between excess alkali and pH; the excess of Cr in the initial solution did not directly correlate to the remaining chromium in the supernatant; additionally, some excess of alkali contributed to increased sludge due to its inability to be dissolved under operational conditions.
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)
