Green Aromatics: Catalytic Valorisation of bio-derived 2,5-dimethylfuran over Zeolites and Zeotypes

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Fältnamn	Indikatorer	Metadata
000		04989nam a2200505 4500
001		oai:research.chalmers.se:361a9a33-a47e-4f7e-9150-6590b5a82b60
003		SwePub
008		221028s2022 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
020		a 9789179057466
024	7	a https://research.chalmers.se/publication/5330232 URI
040		a (SwePub)cth
041		a engb eng
042		9 SwePub
072	7	a dok2 swepub-publicationtype
072	7	a vet2 swepub-contenttype
100	1	a Sauer, Christopher,d 1993u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)sauerc
245	1 0	a Green Aromatics: Catalytic Valorisation of bio-derived 2,5-dimethylfuran over Zeolites and Zeotypes
264	1	a Gothenburg,c 2022
338		a electronic2 rdacarrier
520		a This thesis discusses the use of biomass as a potentially green feedstock for the chemical industry in the urgent shift away from fossil resources. I elaborate on reasons why we cannot afford to burn virgin biomass for energy production, among them a variety of ecosystem services that forests and other lands provide. In addition, the utilisation of biomass should be focused on products that sequester and lock away carbon for more extended periods, e.g. timber, materials and chemicals. In particular, biomass can be used as an alternative "carbon neutral" feedstock for the chemical industry, where we can preserve the already existing chemical complexity in the bio-based molecules. One example is the upgrading of furans to benzene, toluene and xylene (BTX) aromatics with the help of zeolite catalysis. These aromatics are important commodity chemicals, where the shift to a bio-based resource could make use of already existing knowledge, catalyst and production infrastructure. However, research is necessary to understand these new feedstock molecules and their interaction with the catalysts and to enable the design of applicable catalysts. 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.
650	7	a NATURVETENSKAPx Kemix Oorganisk kemi0 (SwePub)104042 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciencesx Inorganic Chemistry0 (SwePub)104042 hsv//eng
650	7	a NATURVETENSKAPx Kemix Fysikalisk kemi0 (SwePub)104022 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciencesx Physical Chemistry0 (SwePub)104022 hsv//eng
650	7	a NATURVETENSKAPx Kemix Analytisk kemi0 (SwePub)104012 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciencesx Analytical Chemistry0 (SwePub)104012 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Kemiteknikx Kemiska processer0 (SwePub)204012 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Chemical Engineeringx Chemical Process Engineering0 (SwePub)204012 hsv//eng
650	7	a NATURVETENSKAPx Kemix Materialkemi0 (SwePub)104032 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciencesx Materials Chemistry0 (SwePub)104032 hsv//eng
650	7	a NATURVETENSKAPx Kemi0 (SwePub)1042 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciences0 (SwePub)1042 hsv//eng
650	7	a NATURVETENSKAPx Kemix Organisk kemi0 (SwePub)104052 hsv//swe
650	7	a NATURAL SCIENCESx Chemical Sciencesx Organic Chemistry0 (SwePub)104052 hsv//eng
653		a Biomass conversion
653		a infrared spectroscopy
653		a BTX Aromatics
653		a 2,5-dimethylfuran
653		a Zeolite
653		a Catalysis
653		a Online Analysis
653		a Zeotype
710	2	a Chalmers tekniska högskola4 org
856	4	u https://research.chalmers.se/publication/533023/file/533023_Fulltext.pdfx primaryx freey FULLTEXT
856	4 8	u https://research.chalmers.se/publication/533023

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