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The sequestration of CO₂ by conversion to hydrocarbons

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posted on 28.03.2022, 17:28 authored by Raha Moossavi Jazari
Carbon dioxide (CO₂) is an abundant greenhouse gas continually emitted into the atmosphere from both natural sources and anthropogenic sources including: fossil fuel combustion, fracking techniques, industrial materials production and land deforestation. Consequently, the natural carbon cycle is overridden leading to strong debates regarding global warming and climate change.The reduction of CO₂ to methane (CH₄), a process known as methanation, has been the subject of extensive study. However most approaches suffer from limitations including: use of sacrificial and expensive metal-based catalysts, high temperature and pressure requirements leading to incomplete reactions, resulting in CO and unreacted CO₂ products. Alternative approaches currently being suggested involve use of silane-based reducing reagents with Lewis acid type catalysts. Consequently this project focused on screening four silane-based reducing agents against B(C₆F₅)₃, a B(C₆F₅)₃/hindered amine tandem catalyst and B(C₆F₅)₃ + tandem catalyst to determine the efficiencies of CH₄ formation and rates of reactions. Additionally, the continuous in situ regeneration of siloxane byproducts into silane reducing agents was investigated. The conversion of CO₂ to CH₄ holds significant potential for the chemical capture of CO₂ and storage of hydrogen in the form of CH₄ which has many applications including: commercial power stations, petrochemical refining and natural gas.

History

Alternative Title

The sequestration of carbon dioxide by conversion to hydrocarbons.

Table of Contents

Chapter 1. Introduction -- Chapter 2. Experimental -- Chapter 3. Results and discussion.

Notes

Bibliography: leaves 52-53 Empirical thesis.

Awarding Institution

Macquarie University

Degree Type

Thesis MRes

Degree

MRes, Macquarie University, Faculty of Science and Engineering, Department of Chemistry and Biomolecular Sciences

Department, Centre or School

Department of Chemistry and Biomolecular Sciences

Year of Award

2015

Principal Supervisor

Christopher McRae

Rights

Copyright Raha Moossavi Jazari 2014. Copyright disclaimer: http://mq.edu.au/library/copyright

Language

English

Extent

1 online resource (viii 58 leaves) illustrations (some colour)

Former Identifiers

mq:57561 http://hdl.handle.net/1959.14/1164734