Special Issue "Catalysts for Production and Conversion of Syngas"

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: 31 January 2020.

Special Issue Editors

Guest Editor
Dr. Rufino M. Navarro Yerga Website E-Mail
Instituto de Catálisis y Petroleoquímica (CSIC), C/ Marie Curie 2, Cantoblanco 28049, Madrid, Spain
Interests: heterogeneous catalysis, catalytic hydrogen production, catalytic steam reforming, catalytic partial oxidation, WGS, SCR-NOx, photocatalytic hydrogen production
Guest Editor
Prof. Dr. José Luis García Fierro Website E-Mail
Instituto de Catálisis y Petroleoquímica (CSIC), C/ Marie Curie 2, Cantoblanco 28049, Madrid, Spain
Phone: +34 91 585 4769
Interests: heterogeneous catalysts for the direct and indirect conversion of methane to syngas and methanol, conversion of light alkanes into olefins, hydrodesulfurization and oxidesulfurization of middle distillates, de-NOx of industrial effluents, three-way catalysts for exhaust treatment, reforming of light and heavy hydrocarbons, catalytic combustion reactions, CO2 valorization

Special Issue Information

Dear Colleagues,

Synthesis gas or, briefly, syngas, is a mixture of CO, CO2, and H2. Syngas is a crucial platform for the production of a variety of products including synthetic hydrocarbons and oxygenates fuels. This Special Issue compiles and reviews the latest advances in catalytic production from several sources (fossil, biomass) and the conversion of syngas into value-added products. Catalytic processes for Syngas production will be revised including production from natural gas, coal, biomass, or virtually any hydrocarbon feedstock, by reaction with steam or oxygen.  with an emphasis on the selective production of low molecular weight alcohols (CnOH, n = 1 − 5), dimethyl ether (DME), light olefins (C2-C4, which are key building block chemicals), and hydrocarbons (C5+ as liquid fuels). Recent advances in understanding and developing active phases, supports, promoters, and reactor configurations to control the selectivity in the syngas production and conversion are the most challenging subjects for scientific research in syngas conversion. This Special Issue provides insight into the challenges surrounding syngas conversion and the initiatives in catalysis research undertaken to overcome those. Submissions are welcome in the form of original research papers or short reviews that reflect the state-of-the-art of this research area.

Dr. Rufino M. Navarro Yerga
Prof. Dr. Jose Luis García Fierro
Guest Editors

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 papers will be 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 1600 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

  • Production of syngas
  • Syngas to methanol
  • Syngas to alcohols
  • Syngas to lower olefins
  • Syngas to DME
  • Heterogeneous catalysts
  • Fischer–Tropsch synthesis

Published Papers (3 papers)

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Research

Open AccessArticle
Adsorption Characteristics of Gas Molecules (H2O, CO2, CO, CH4, and H2) on CaO-Based Catalysts during Biomass Thermal Conversion with in Situ CO2 Capture
Catalysts 2019, 9(9), 757; https://doi.org/10.3390/catal9090757 - 09 Sep 2019
Abstract
Biomass thermochemical conversion with in situ CO2 capture is a promising technology in the production of high-quality gas. The adsorption competition mechanism of gas molecules (H2O, CO2, CO, CH4, and H2) on CaO-based catalyst [...] Read more.
Biomass thermochemical conversion with in situ CO2 capture is a promising technology in the production of high-quality gas. The adsorption competition mechanism of gas molecules (H2O, CO2, CO, CH4, and H2) on CaO-based catalyst surfaces was studied using density functional theory (DFT) and experimental methods. The adsorption characteristics of CO2 on CaO and 10 wt % Ni/CaO (100) surfaces were investigated in a temperature range of 550–700 °C. The adsorption energies were increased and then weakened, reaching their maximum at 650 °C. The simulation results were verified by CO2 temperature-programmed desorption (CO2-TPD) experiments. By the density of states and Mulliken population analysis, CaO doped with Ni caused a change in the electronic structure of the Osurf atom and decreased the C–O bond stability. The molecular competition mechanism on the CaO-based catalyst surface was identified by DFT simulation. As a result, the adsorption energies decreased in the following order: H2O > CO2 > CO > CH4 > H2. The increase of CO2 adsorption energy on the 10 wt % Ni/CaO surface, compared with the CaO surface, was the largest among those of the studied molecules, and its value increased from 1.45 eV to 1.81 eV. Therefore, the 10 wt % Ni/CaO catalyst is conducive to in situ CO2 capture in biomass pyrolysis. Full article
(This article belongs to the Special Issue Catalysts for Production and Conversion of Syngas)
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Open AccessCommunication
In Situ Encapsulated Pt Nanoparticles Dispersed in Low Temperature Oxygen for Partial Oxidation of Methane to Syngas
Catalysts 2019, 9(9), 720; https://doi.org/10.3390/catal9090720 - 27 Aug 2019
Abstract
Highly dispersed ultra-small Pt nanoparticles limited in nanosized silicalite-1 zeolite were prepared by in situ encapsulation strategy using H2PtCl6·6H2O as a precursor and tetrapropylammonium hydroxide as a template. The prepared [email protected] catalyst was characterized by X-ray diffraction [...] Read more.
Highly dispersed ultra-small Pt nanoparticles limited in nanosized silicalite-1 zeolite were prepared by in situ encapsulation strategy using H2PtCl6·6H2O as a precursor and tetrapropylammonium hydroxide as a template. The prepared [email protected] catalyst was characterized by X-ray diffraction (XRD), inductively coupled plasma (ICP), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), N2 adsorption-desorption, CO adsorption, and TGA techniques and exhibited unmatched catalytic activity and sintering resistance in the partial oxidation of methane to syngas. Strikingly, [email protected] catalyst with further reduced size and increased dispersibility of Pt nanoparticles showed enhanced catalytic activity after low-temperature oxygen calcination. However, for Pt/S-1 catalyst, low-temperature oxygen calcination did not improve its catalytic activity. Full article
(This article belongs to the Special Issue Catalysts for Production and Conversion of Syngas)
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Open AccessArticle
Direct Conversion of CO2 into Dimethyl Ether over Al2O3/Cu/ZnO Catalysts Prepared by Sequential Precipitation
Catalysts 2019, 9(6), 524; https://doi.org/10.3390/catal9060524 - 12 Jun 2019
Abstract
Bifunctional Al2O3/Cu/ZnO catalysts with Al composition of between 30 mol% and 80 mol% were prepared by sequential precipitation (SP) for the conversion of CO2 into dimethyl ether (DME). In the SP synthesis, the concentration of a precipitation agent [...] Read more.
Bifunctional Al2O3/Cu/ZnO catalysts with Al composition of between 30 mol% and 80 mol% were prepared by sequential precipitation (SP) for the conversion of CO2 into dimethyl ether (DME). In the SP synthesis, the concentration of a precipitation agent managed to be high enough to induce the complete precipitation of Al3+. The prepared precipitates were composed of zincian malachite and amorphous AlO(OH). Furthermore, the calcined mixed metal oxide materials of 60% and 80% Al exhibited a higher acidity than commercial Al2O3 and the H2-reduced catalysts showed the similar Cu dispersion of 6%–7% at all Cu loadings. In the activity test at 573 K and 50 bar, the SP-derived catalyst of 80% Al (SP-80) displayed the best performance corresponding to CO2 conversion of 25% and DME selectivity of 75% that are close to equilibrium values. In order to overcome the thermodynamic limitation, a dual-bed catalyst system was made up of SP-80 in the first layer and zeolite ferrierite in the next. This approach enabled DME selectivity to be enhanced to 90% while CO2 conversion increased a little. Consequently, the studied catalyst system based on the SP-derived catalysts can contribute greatly to selective DME production from CO2. Full article
(This article belongs to the Special Issue Catalysts for Production and Conversion of Syngas)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Dual effects of Zinc Species on Active Sites in Bifunctional Composite Catalysts Zr/H[Zn]ZSM-5 for Alkylation of Benzene with Syngas
Abstract: The bifunctional composite catalysts Zr/H[Zn]xZ with different Zn contents were prepared by combining the impregnation and physical mixing method. The Effect of zinc species on two active sites in bifunctional composite catalysts Zr/H[Zn]ZSM-5 for alkylation of benzene with syngas has been investigated. The results indicated that the introduction of Zn greatly improves the catalytic performance and the selectivity of the target products, and changed with the change of Zn content. The sample Zr/H[Zn]3Z exhibited the highest total selectivity of toluene and xylene of 93.27 % and the benzene conversion of 18.09 % at 400 °C under 3.3 MPa, nevertheless the sample Zr/H[Zn]5Z showed the highest benzene conversion and xylene selectivity, which reached 30.56% and 26.82%, respectively. The acidic properties and state of Zn species of H[Zn]xZ zeolites have also been explored. All evidence suggested that most of the Zn introduced into the HZ zeolite existed in the catalyst as Zn (OH)+, forming new Zn-Lewis acid at the expense of the Brønsted acid. The Zn species plays a role in three aspects in the alkylation reaction between benzene and syngas. First, the Znspecies can provide H species for ZrO2 activation of CO by promoting H2 activation, thus generating more methanol; Second, Zn(OH)+ species formed in the zeolite can inhibit the side reactions of methanol so as to promote the alkylation of benzene and methanol; Finally, the Zn-Lewis acidic sites can inhibit the cracking reaction of C6+= olefins, and further promote the dehydrogenation aromatization reaction.

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