Metal Modified and Acidic Mesoporous Catalytic Materials for Valorization of Lignocellulosic Biomass, Synthesis of Speciality, Fine Chemicals and Pharmaceuticals

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 3701

Special Issue Editors


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Faculty of Science and Engineering, Industrial Chemistry and Reaction Engineering, Åbo Akademi University, Henriksgatan 2, FI-20500 Turku, Finland
Interests: heterogeneous catalysis; catalyst synthesis; nanoporous materials; catalyst characterization; zeolite catalysis; refinery processes; hydrocarbon conversion; reaction mechanism; biomass transformations
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Guest Editor
Dipartimento DICEAM, Università degli Studi Mediterranea di Reggio Calabria, 89123 Reggio Calabria, Italy
Interests: heterogeneous catalysis; lignocellulosic biomasses; wastes valorization; hydrogenolysis; hydrogenation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Structured and non-structured mesoporous catalytic materials have found applications in several industrial processes for the production of value added chemicals from biomass, fine chemicals, speciality, medicinal drug molecules and pharmaceutical components. Metal modified and acidic structured mesoporous materials such as MCM-41, MCM-48, MCM-50, MCM-36 and SBA-15 due to uniform pores, regular channel systems, high surface area, shape selectivity property, as well as Brønsted and Lewis acid sites, are utilized in the organic synthesis, petro-chemical industry, the purification of industrial waste water and solving environmental problems. Synthesis parameters such as time, temperature, pH of the gel solutions, sources of silica, alumina, surfactants, structure directing agents, methods of stirring and thermal treatments substantially influence the physico-chemical and catalytic properties.

Special Issue of Catalysts: "Metal Modified and Acidic Mesoporous Catalytic Materials for Valorization of Lignocellulosic Biomass, Synthesis of Speciality, Fine Chemicals and Pharmaceuticals" invites original research papers on following topics:

Structured mesoporous materials;

Metal modified and acidic mesoporous materials;

MCM-41, MCM-48, MCM-50, MCM-36, SBA-15;

Synthesis and characterization of structured and non-structured mesoporous materials;

Physico-chemical characterizations;

Fine chemicals, speciality and pharmaceuticals;

Petro-chemicals, environmental catalysis;

Renewables, biofuels, jet fuels, biodiesels.

Dr. Narendra Kumar
Dr. Emilia Paone
Guest Editor

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Keywords

  • Mesoporous materials
  • Structured
  • Ordered synthesis
  • Characterization
  • Metal nanoparticles
  • Transition
  • Noble metals
  • Active sites
  • Catalysts
  • Adsorbents
  • Biofuels
  • Chemicals

Published Papers (1 paper)

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Research

26 pages, 3910 KiB  
Article
Catalytic Deactivation of HY Zeolites in the Dehydration of Glycerol to Acrolein
by Israel Pala-Rosas, José L. Contreras, José Salmones, Beatriz Zeifert, Ricardo López-Medina, Juan Navarrete-Bolaños, Sofía Hernández-Ramírez, Jennipher Pérez-Cabrera and Andrés A. Fragoso-Montes de Oca
Catalysts 2021, 11(3), 360; https://doi.org/10.3390/catal11030360 - 10 Mar 2021
Cited by 25 | Viewed by 2999
Abstract
The study of the deactivation of HY zeolites in the dehydration reaction of glycerol to acrolein has represented a challenge for the design of new catalysts. HY zeolites with SiO2/Al2O3 molar ratios between 3.5 and 80 were studied. [...] Read more.
The study of the deactivation of HY zeolites in the dehydration reaction of glycerol to acrolein has represented a challenge for the design of new catalysts. HY zeolites with SiO2/Al2O3 molar ratios between 3.5 and 80 were studied. The solids were characterized by XRD, N2 physisorption, SEM-EDXS, Raman and UV-vis spectroscopies, infrared spectroscopy of pyridine (FTIR-Py) and catalytic activity tests from 250 °C to 325 °C. It was found that the total amount of acid sites per unit area of catalyst decreased as the SiO2/Al2O3 molar ratio increased from 3.5 to 80, resulting in the decrease in the initial glycerol conversion. The initial acrolein selectivity was promoted with the increase of the Brønsted/Lewis acid sites ratio at any reaction temperature. The deactivation tests showed that the catalyst lifetime depended on the pore structure, improving with the presence of large surface areas as evidenced by the deactivation rate constants. The characterization of the deactivated catalysts by XRD, N2 physisorption and thermogravimetric analysis indicated that the deposition of coke resulted in the total obstruction of micropores and the partial blockage of mesopores. Moreover, the presence of large mesopores and surface areas allowed the amount of coke deposited at the catalyst surface to be reduced. Full article
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