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Influence of the porosity and acidic properties of aluminosilicate catalysts on coke formation during the catalytic pyrolysis of lignin
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0002-8264-4736
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2022 (English)In: Journal of Analytical and Applied Pyrolysis, ISSN 0165-2370, E-ISSN 1873-250X, Vol. 165, article id 105536Article in journal (Refereed) Published
Abstract [en]

Five aluminosilicate catalysts with different textural and acidic properties are used to study the influence of their acidic and porous properties on the coke formation during the fast catalytic pyrolysis of lignin. The competition between coke formation and target product (hydrocarbons) formation in regard to different pore sizes and Si/Al ratios is classified via performing X-Ray Diffraction (XRD), nitrogen adsorption-desorption, pyrolysis–gas chromatography–mass spectrometry (Py-GCMS), kinetic calculations, and thermogravimetric (TG)/temperature programmed oxidation (TPO) measurements. The results indicated that a pore size consistent with the critical diameters of the pyrolysis products of lignin is a prerequisite for a catalyst to reach a high selectivity for the desired products with less coke formation. A relatively large pore size can cause severe coke formation; however, large pores are favorable for increasing the reaction rate by increasing the diffusion efficiency. A catalyst with sufficient acidity is also essential for high selectivity towards target products. © 2022 The Authors

Place, publisher, year, edition, pages
Elsevier B.V. , 2022. Vol. 165, article id 105536
Keywords [en]
Acidity, Aluminosilicates, Coke formation, Lignin, Pore size, Catalyst selectivity, Coke, Gas adsorption, Gas chromatography, Mass spectrometry, Pyrolysis, Temperature programmed desorption, Acidic properties, Aluminosilicate catalysts, Catalytic pyrolysis, High selectivity, Hydrocarbon formation, Porosity properties, Porous properties, Textural properties, ]+ catalyst, Formation, Products, Selectivity
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URN: urn:nbn:se:ri:diva-59324DOI: 10.1016/j.jaap.2022.105536Scopus ID: 2-s2.0-85129941106OAI: oai:DiVA.org:ri-59324DiVA, id: diva2:1673002
Note

 Funding details: 47971-1; Funding details: European Commission, EC; Funding details: China Scholarship Council, CSC; Funding text 1: We gratefully acknowledge the financial support of the Swedish Energy Agency – Energimyndigheten with project number 47971-1 and the EU project BRISK 2. One of the authors, Hanmin Yang, would like to acknowledge the financial support from the Chinese Scholarship Council (CSC) and Stiftelsen Energitekniskt Centrum i Piteå , Sweden.

Available from: 2022-06-20 Created: 2022-06-20 Last updated: 2023-05-25Bibliographically approved

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