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Processes
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Heterogeneous Catalysis Processes
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Heterogeneous Catalysis Processes

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Catalysis Enhanced Processes".

Deadline for manuscript submissions: closed (16 October 2024) | Viewed by 10291

Special Issue Editor

Dr. Pravin P. Upare

E-Mail Website
Guest Editor
Green Carbon Conversion Research Group, Korea Research Institute of Chemical Technology, Daejeon, Republic of Korea
Interests: biomass and biorefinery conversion processes; heterogenous catalysis

Special Issue Information

Dear Colleagues,

Currently, chemical conversion processes involving heterogeneous catalysis are receiving great attention and interest, and “catalysis” itself is gaining importance in various industrial applications to fulfill the energy needs of human society. Catalysis can create chemical conversion processes and equipment to produce bio-fuels, bio-power, and a spectrum of valuable chemicals from a variety of feedstocks. Heterogenous catalysis is of fundamental interest because it provides an understanding of the interconversion/transformation of chemicals between molecules as well as their externally applied potential. However, the development of technology for the production of bio-based chemicals is quite limited. Therefore, advanced and intensive research on chemical conversions is required. In addition, the development of catalytic processes using heterogeneous catalysts for the selective de-functionalization of different substrates containing high functionality to yield a broad range of chemical structures is required, and significant effort in catalysis research is needed to achieve optimal integration of these various chemical conversion processes. This Special issue of Processes on “Heterogenous Catalysis Processes” is therefore timely.

We invite authors to submit articles and reviews to this Special Issue related, but are not limited, to the following topics:

  • The development of catalytic conversion processes in bio refinery conversion processes;
  • The development of catalytic conversion processes in peteroleum refinery conversion processes;
  • The conversion of carbon dioxide into desired products;
  • The investigation of catalytic materials using different characterization techeniques to understand the specific role of catalyst systems in obtaining a desired product;
  • The development of novel catalysts for important chemical conversions.

Dr. Pravin P. Upare
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • heterogeneous catalysis
  • biorefinery
  • biomass
  • chemical conversion processes
  • fuels
  • biochemical conversion
  • CO2 utilization
  • petrochemical conversion processes
  • molecular catalysis
  • electrocatalysis

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Published Papers (3 papers)

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Research

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13 pages, 4951 KiB  
Article
Porous Defective Bi/Bi3NbO7 Nanosheets for Efficient Photocatalytic NO Removal under Visible Light
by Ting Gao, Jingqi Lin, Ke Zhang, Mohsen Padervand, Yifan Zhang, Wei Zhang, Menglin Shi and Chuanyi Wang
Processes 2023, 11(1), 115; https://doi.org/10.3390/pr11010115 - 31 Dec 2022
Cited by 13 | Viewed by 1771
Abstract
Since conventional techniques are ineffective for NO removal at low concentrations, photocatalysis has become attractive in this regard, recently. However, in practice, photocatalytic NO removal has drawbacks such as limited light absorption and the proclivity of producing toxic by-products. To address these issues, [...] Read more.
Since conventional techniques are ineffective for NO removal at low concentrations, photocatalysis has become attractive in this regard, recently. However, in practice, photocatalytic NO removal has drawbacks such as limited light absorption and the proclivity of producing toxic by-products. To address these issues, novel defective Bi/Bi3NbO7 structures with good porosity were fabricated by a solvothermal method and used for enhanced photocatalytic NO removal under visible light irradiation. The morphological and structural properties of the prepared materials were comprehensively analyzed. The optimal photocatalytic activity of pore-defective Bi/Bi3NbO7 for NO removal was 60.3%, when the molar ratios of urea and Bi(NO)3•5H2O to pristine Bi3NbO7 were 1:25 and 1:2, respectively, under the following operational conditions: NO concentration of 700 ppb, catalyst dosage of 50 mg and irradiation time of 14 min. The induced defects and the surface plasmon resonance (SPR) effect of Bi nanodots made remarkable contributions to improving the photocatalytic NO removal as well as inhibiting the toxic byproduct NO2. The photocatalytic NO removal pathway over the prepared photocatalysts was further mechanistically clarified taking advantage of EPR results and scavenging experiments. Considering the increased NO generation in the atmosphere, this work may provide novel insights for designing effective porous photocatalysts to treat gaseous toxic pollutants. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis Processes)
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15 pages, 3331 KiB  
Article
Removal of an Ethoxylated Alkylphenol by Adsorption on Zeolites and Photocatalysis with TiO2/Ag
by Claudia Aguilar Ucán, Mohamed Abatal, Carlos Montalvo Romero, Francisco Anguebes Franseschi, Miguel Angel Ramirez Elias and Denis Cantú Lozano
Processes 2019, 7(12), 889; https://doi.org/10.3390/pr7120889 - 1 Dec 2019
Cited by 9 | Viewed by 2937
Abstract
Two advanced removal methods (adsorption and photocatalysis) were compared for the elimination of an ethoxylated alkylphenol (nonylphenol polyethylene glycol, NPEG). For the adsorption process, zeolites were used in their natural state, and the process was characterized by DRX (X-ray diffraction) and SEM–EDS (Scanning [...] Read more.
Two advanced removal methods (adsorption and photocatalysis) were compared for the elimination of an ethoxylated alkylphenol (nonylphenol polyethylene glycol, NPEG). For the adsorption process, zeolites were used in their natural state, and the process was characterized by DRX (X-ray diffraction) and SEM–EDS (Scanning electron microscopy). The analysis of the results of the adsorption kinetics was carried out using different isotherms to interpret the removal capacity of zeolites. The Temkin kinetic model better predicted the experimental data and was satisfactorily adjusted to models of pseudo-second order (PSO). On the other hand, for photocatalysis, nano-particles of Ag (silver) were deposited on titanium oxide (TiO2) Degussa-P25 by photo-deposition, and the catalyst was characterized by diffuse reflectance and SEM–EDS. The data obtained using the two removal techniques were analyzed by UV–Vis (ultraviolet-visible spectrophotometry) and total organic carbon (TOC). The kinetic data were compared. The photocatalytic process showed the highest efficiency in the removal of NPEG, corresponding to >80%, while the efficiency of the adsorption process was <60%. This was attributed to the recalcitrant and surfactant nature of NPEG. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis Processes)
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Review

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20 pages, 2094 KiB  
Review
Comparison of Moving-Bed Catalytic Tar Hydrocracking Processes
by Vladimir Kapustin, Elena Chernysheva and Roman Khakimov
Processes 2021, 9(3), 500; https://doi.org/10.3390/pr9030500 - 10 Mar 2021
Cited by 9 | Viewed by 4412
Abstract
In recent years, there has been a trend in the global oil industry to improve the proportion of heavy high-sulfur crude oils in the total volume of extracted and processed resources, reserves of which are estimated at over 800 billion metric tons. Therefore, [...] Read more.
In recent years, there has been a trend in the global oil industry to improve the proportion of heavy high-sulfur crude oils in the total volume of extracted and processed resources, reserves of which are estimated at over 800 billion metric tons. Therefore, the main line of oil refining is processing of heavy crudes and residua to allow maximum use of the hydrocarbon potential and yield of high-margin products. Hydrogenation processes of heavy raw materials are most attractive in terms of product quality. This article analyzes tar hydrocracking processes that are either in operation or at the stage of full-scale testing. These include Veba Combi-Cracker (VCC), Uniflex, suspended-bed catalyst hydrocracking (ENI), and vacuum residue hydroconversion (TIPS RAS). These technologies use heterogeneous catalysts and are designed to obtain the largest possible amount of liquid products. This article discusses the features of each technology, highlights their advantages and disadvantages, shows the main approaches to process management, and speculates about the development of these technologies. Tar refining is a major process in heavy oil upgrading, and the development of efficient tar-processing methods will influence refinery configurations and management. Full article
(This article belongs to the Special Issue Heterogeneous Catalysis Processes)
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