Green Aromatics: Catalytic Valorisation of bio-derived 2,5-dimethylfuran over Zeolites and Zeotypes
Doctoral thesis, 2022
In order to study the interaction of the furans, in particular 2,5-dimethylfuran (2,5-dmf), I describe and discuss the development of an analytical methodology that utilises infrared spectroscopy and mass spectrometry for the on-line identification and quantification of product molecules during catalytic reactions.
This on-line analysis method is then applied to the catalytic conversion of 2,5-dmf to aromatics over a range of zeolite and zeotype catalysts. In-depth studies with ammonia as a probe molecule of the catalytic active acid sites, as well as temperature programmed experiments with ammonia and 2,5-dmf give insights into product distribution, selectivity changes and deactivation of the catalyst. For example, olefins and aromatics are initially preferred products, while with increasing time on stream, the isomerisation of 2,5-dmf becomes dominant. The incorporation of Ga into the zeotype framework, resulting in a Ga-Silicate, shows how targeted catalyst design can increase overall aromatics production. This catalyst is also suitable for selective isomerisation of 2,5-dmf to 2,4-dimethylfuran, which has a rare substitution pattern. Finally, itwas found that the most valuable of BTX, p-xylene, can be produced more selectively when 2,5-dmf is pre-adsorbed onto zeolite ZSM-5 and then released during a temperature programmed product desorption.
Biomass conversion
infrared spectroscopy
BTX Aromatics
2,5-dimethylfuran
Zeolite
Catalysis
Online Analysis
Zeotype
Author
Christopher Sauer
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Isomorphous Substitution of Gallium into MFI-Framework Zeolite Increases 2,5-Dimethylfuran to Aromatics Selectivity and Suppresses Catalyst Deactivation
Topics in Catalysis,;Vol. 66(2023)p. 1329-1340
Journal article
Valorisation of 2,5-dimethylfuran over zeolite catalysts studied by on-line FTIR-MS gas phase analysis
Catalysis Science and Technology,;Vol. 12(2022)p. 750-761
Journal article
C. Sauer, P. Mestre Tosas, A. Schaefer and P.-A. Carlsson, Temperature programmed experiments reveal catalyst deactivation and high p-xylene selectivity from 2,5-dimethylfuran over ZSM-5 zeolites
Green aromatics for a biobased economy
Formas (2017-00420), 2018-01-01 -- 2020-12-31.
Subject Categories
Inorganic Chemistry
Physical Chemistry
Analytical Chemistry
Chemical Process Engineering
Materials Chemistry
Chemical Sciences
Organic Chemistry
Driving Forces
Sustainable development
Roots
Basic sciences
Infrastructure
Chalmers Materials Analysis Laboratory
Areas of Advance
Materials Science
ISBN
978-91-7905-746-6
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 5212
Publisher
Chalmers
HC4, Hörsalsvägen 14, Göteborg
Opponent: Prof. Salvador Ordóñez García, Department of Chemical Engineering and Environmental Technology, University of Oviedo, Spain