Designing zeolite-based catalysts for production of fuels and chemicals

Farnoosh Goodarzi*

*Corresponding author for this work

Research output: Book/ReportPh.D. thesis

Abstract

The world is struggling with different challenges such as depletion of fossil fuels, growing gap between energy demand and production and most importantly emergent environmental issues. Therefore, alternative environmentally friendly resources for production of chemicals and energy are necessities. However, the transition and utilization of new resources requires development of novel technologies. Thus, the aim of this thesis was to develop new efficient catalysts and investigate their performances in different energy and chemical production processes such as carbon dioxide hydrogenation to methane, methanol-to-hydrocarbons and dehydroaromatization of ethane.
Chapter 1 introduces basic concepts in heterogeneous catalysis briefly. Furthermore, the chapter introduces zeolites, their unique properties for application in heterogeneous catalysis and different synthesis approaches. Finally, the chapter focuses on deactivation of zeolite-based catalysts and summarizes the scope of this thesis.
Chapter 2 describes synthesis methods and the most important characterization techniques including X-ray powder diffraction, nitrogen physisorption and electron microscopy, with the latter two described in more detail.
Chapter 3 introduces the hydrogenation of carbon dioxide to methane and deactivation challenges related to the zeolite supported metal catalysts in the process. Furthermore, the chapter presents different zeolite encapsulated nickel catalysts that are developed and studied for this reaction. The catalysts synthesis, characterization and catalytic results of the investigation are provided as paper I and paper II in this chapter.
Chapter 4 gives an introduction to the methanol-to-hydrocarbons reaction and deactivation challenges of the zeolite catalysts in the process. Furthermore, the chapter presents the catalysts that are developed and studied for this reaction. The catalysts synthesis, characterization and catalytic results of the investigation are provided as paper III in this chapter.
Chapter 5 introduces dehydroaromatization of light alkanes, in particular ethane, reaction mechanism and deactivation challenges of the zeolite-based catalysts in the process. The chapter is divided into two sections: Section one is focused on developing zinc- and platinum-containing zeolite catalysts for dehydroaromatization of ethane. The synthesis, characterizations and catalytic results of Zn/ZSM-5 and Pt/ZSM-5 catalysts are provided as paper IV and paper V in this chapter. Section two is dedicated to the remarkable influence of sulfur on catalytic performance, selectivity in particular, of the zinc-containing zeolite catalysts. These results are presented in paper VI.
Original languageEnglish
Place of PublicationKgs. Lyngby
PublisherTechnical University of Denmark
Number of pages211
Publication statusPublished - 2019

Projects

Production of aromatics from light alkanes using metal sulfide catalysts

Goodarzi, F., Kegnæs, S., Joensen, F. H., Fehrmann, R., Kustov, A. & Mintova, S.

Eksternt finansieret virksomhed

01/11/201613/01/2020

Project: PhD

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