Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.3
3.9
Journals
Catalysts
Special Issues
CO and CO2 Conversion over Heterogeneous Catalysts
share announcement

CO and CO2 Conversion over Heterogeneous Catalysts

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalysis in Organic and Polymer Chemistry".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 11643

Special Issue Editor

Dr. Sergei Chernyak

E-Mail Website1 Website2
Guest Editor
Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, 119991 Moscow, Russia
Interests: Fischer–Tropsch synthesis; CO2 hydrogenation; carbon nanotubes; graphene nanoflakes; doped carbon nanomaterials in catalysis and energy storage; graphene quantum dots

Special Issue Information

Dear Colleagues,

Catalytic conversion of carbon oxides is one of the most important topics in terms of ecological, chemical engineering, and energy aspects. The choice of the appropriate catalyst for these processes may lead to a great diversity of valuable products. Clean synthetic fuels, lubricants, light olefins, methanol and high alcohols, dimethyl ether, polyurethane, etc. can be produced through CO or CO2 hydrogenation, oxidative dehydrogenation, and other reactions. Transformations of carbon oxides are also of great interest for green chemistry because effective and low-cost CO2 utilization and CO oxidation are significant ecological challenges facing our world.

Despite large-scale implementation of several reactions, many issues still need to be clarified and resolved. Optimization of both catalytic systems and reaction conditions, study of reaction mechanisms, and development of new effective nanocatalysts are the main topics in the case of CO and CO2 conversion. This Special Issue aims to show the recent progress and trends in theoretical and practical study of carbon oxide transformations into valuable products via heterogeneous catalytic processes.

Dr. Sergei Chernyak
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. Catalysts 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 2700 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

  • Fischer–Tropsch synthesis
  • CO2hydrogenation
  • Methanol synthesis
  • Methanation
  • Oxidative dehydrogenation
  • Support effect
  • Dimethyl ether synthesis
  • Synthesis of light olefins

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

19 pages, 5082 KiB  
Article
Development of an Iron-Based Fischer—Tropsch Catalyst with High Attrition Resistance and Stability for Industrial Application
by Quan Lin, Meng Cheng, Kui Zhang, Weizhen Li, Peng Wu, Hai Chang, Yijun Lv and Zhuowu Men
Catalysts 2021, 11(8), 908; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11080908 - 27 Jul 2021
Cited by 10 | Viewed by 2812
Abstract
In order to develop an iron-based catalyst with high attrition resistance and stability for Fischer–Tropsch synthesis (FTS), a series of experiments were carried out to investigate the effects of SiO2 and its hydroxyl content and a boron promoter on the attrition resistance [...] Read more.
In order to develop an iron-based catalyst with high attrition resistance and stability for Fischer–Tropsch synthesis (FTS), a series of experiments were carried out to investigate the effects of SiO2 and its hydroxyl content and a boron promoter on the attrition resistance and catalytic behavior of spray-dried precipitated Fe/Cu/K/SiO2 catalysts. The catalysts were characterized by means of N2 physisorption, nuclear magnetic resonance (NMR), X-ray diffraction (XRD), Raman spectrum, X-ray photoelectron spectroscopy (XPS), H2-thermogravimetric analysis (H2-TGA), temperature-programmed reduction and hydrogenation (TPR and TPH), and scanning and transmission electron microscopy (SEM and TEM). The FTS performance of the catalysts was tested in a slurry-phase continuously stirred tank reactor (CSTR), while the attrition resistance study included a physical test with the standard method and a chemical attrition test under simulated reaction conditions. The results indicated that the increase in SiO2 content enhances catalysts’ attrition resistance and FTS stability, but decreases activity due to the suppression of further reduction of the catalysts. Moreover, the attrition resistance of the catalysts with the same silica content was greatly improved with an increase in hydroxyl number within silica sources, as well as the FTS activity and stability to some degree. Furthermore, the boron element was found to show remarkable promotion of FTS stability, and the promotion mechanism was discussed with regard to probable interactions between Fe and B, K and B, and SiO2 and B, etc. An optimized catalyst based on the results of this study was finalized, scaled up, and successfully applied in a megaton industrial slurry bubble FTS unit, exhibiting excellent FTS performance. Full article
(This article belongs to the Special Issue CO and CO2 Conversion over Heterogeneous Catalysts)
►▼ Show Figures

Figure 1

10 pages, 1277 KiB  
Article
Influence of Ni on Fe and Co-Fe Based Catalysts for High-Calorific Synthetic Natural Gas
by Tae-Young Kim, Seongbin Jo, Yeji Lee, Suk-Hwan Kang, Joon-Woo Kim, Soo-Chool Lee and Jae-Chang Kim
Catalysts 2021, 11(6), 697; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11060697 - 31 May 2021
Cited by 4 | Viewed by 2454
Abstract
Fe-Ni and Co-Fe-Ni catalysts were prepared by the wet impregnation method for the production of high-calorific synthetic natural gas. The influence of Ni addition to Fe and Co-Fe catalyst structure and catalytic performance was investigated. The results show that the increasing of Ni [...] Read more.
Fe-Ni and Co-Fe-Ni catalysts were prepared by the wet impregnation method for the production of high-calorific synthetic natural gas. The influence of Ni addition to Fe and Co-Fe catalyst structure and catalytic performance was investigated. The results show that the increasing of Ni amount in Fe-Ni and Co-Fe-Ni catalysts increased the formation of Ni-Fe alloy. In addition, the addition of nickel to the Fe and Co-Fe catalysts could promote the dispersion of metal and decrease the reduction temperature. Consequently, the Fe-Ni and Co-Fe-Ni catalysts exhibited higher CO conversion compared to Fe and Co-Fe catalysts. A higher Ni amount in the catalysts could increase C1–C4 hydrocarbon production and reduce the byproducts (C5+ and CO2). Among the catalysts, the 5Co-15Fe-5Ni/γ-Al2O3 catalyst affords a high light hydrocarbon yield (51.7% CH4 and 21.8% C2–C4) with a low byproduct yield (14.1% C5+ and 12.1% CO2). Full article
(This article belongs to the Special Issue CO and CO2 Conversion over Heterogeneous Catalysts)
►▼ Show Figures

Graphical abstract

25 pages, 20440 KiB  
Article
Influence of Cs Loading on Pt/m-ZrO2 Water–Gas Shift Catalysts
by Zahra Rajabi, Michela Martinelli, Caleb D. Watson, Donald C. Cronauer, A. Jeremy Kropf and Gary Jacobs
Catalysts 2021, 11(5), 570; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11050570 - 29 Apr 2021
Cited by 7 | Viewed by 1884
Abstract
Certain alkali metals (Na, K) at targeted loadings have been shown in recent decades to significantly promote the LT-WGS reaction. This occurs at alkali doping levels where a redshift in the C-H band of formate occurs, indicating electronic weakening of the bond. The [...] Read more.
Certain alkali metals (Na, K) at targeted loadings have been shown in recent decades to significantly promote the LT-WGS reaction. This occurs at alkali doping levels where a redshift in the C-H band of formate occurs, indicating electronic weakening of the bond. The C-H bond breaking of formate is the proposed rate-limiting step of the formate associative mechanism, lending support to the occurrence of this mechanism in H2-rich environments of the LT-WGS stage of fuel processors. Continuing in this vein of research, 2%Pt/m-ZrO2 was promoted with various levels of Cs in order to explore its influence on the rate of formate intermediate decomposition, as well as that of LT-WGS in a fixed bed reactor. In situ DRIFTS experiments revealed that Cs promoter loadings of 3.87% to 7.22% resulted in significant acceleration of the forward formate decomposition in steam at 130 °C. Of all of the alkali metals tested to date, the redshift in the formate ν(CH) band with the incorporation of Cs was the greatest. XANES difference experiments at the Pt L2 and L3 edges indicated that the electronic effect was not likely due to an enrichment of electronic density on Pt. CO2 TPD experiments revealed that, unlike Na and K promoters, Cs behaves more like Rb in that the decomposition of the second intermediate in LT-WGS, carbonate species, is hindered due to (1) increased basicity of Cs, (2) the tendency of Cs to cover Pt sites that facilitate CO2 decomposition, and (3) the tendency of Cs to increase Pt particle size as shown by EXAFS results, resulting in fewer Pt sites that facilitate CO2 decomposition. As such, the LT-WGS rate was hindered overall and the rate-limiting step shifted to carbonate decomposition (CO2 removal). Like its Rb counterpart, low levels of added Cs (e.g., 0.72%Cs) were found to improve the stability of the catalyst relative to the unpromoted catalyst; the stability comparison was made at similar CO conversion level as well as similar space velocity. Full article
(This article belongs to the Special Issue CO and CO2 Conversion over Heterogeneous Catalysts)
►▼ Show Figures

Figure 1

16 pages, 4464 KiB  
Article
In Situ Conditioning of CO2-Rich Syngas during the Synthesis of Methanol
by Cristina Peinado, Dalia Liuzzi, Alberto Sanchís, Laura Pascual, Miguel A. Peña, Jurriaan Boon and Sergio Rojas
Catalysts 2021, 11(5), 534; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11050534 - 21 Apr 2021
Cited by 9 | Viewed by 3681
Abstract
The synthesis of methanol from biomass-derived syngas can be challenging because of the high CO2 content in the bio-syngas, resulting in lower kinetics and higher catalyst deactivation. This work explores the in situ pre-treatment of a CO2-rich syngas with a [...] Read more.
The synthesis of methanol from biomass-derived syngas can be challenging because of the high CO2 content in the bio-syngas, resulting in lower kinetics and higher catalyst deactivation. This work explores the in situ pre-treatment of a CO2-rich syngas with a CO2/CO ratio equal to 1.9 through the reverse-water gas shift reaction with the aim of adjusting this ratio to a more favorable one for the synthesis of methanol with Cu-based catalysts. Both reactions take place in two catalytic beds placed in the same reactor, thus intensifying the methanol process. The water produced during syngas conditioning is removed by means of a sorbent zeolite to prevent the methanol catalyst deactivation and to shift the equilibrium towards the methanol formation. The combination of the CO2 shifting and the water sorption strategies lead to higher productivities of the catalytic bed and, under certain reaction conditions, to higher methanol productions. Full article
(This article belongs to the Special Issue CO and CO2 Conversion over Heterogeneous Catalysts)
►▼ Show Figures

Graphical abstract

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop