MSc. Wen Tan at the Department of Chemistry, Faculty of Mathematics and Natural Sciences, is defending his thesis
«The Atmospheric Fate of Selected Amines Emitted from Carbon Capture Facilities» for the degree of Philosophiae Doctor.
The Disputation will be held digital using Zoom. The Chair of Defence will lead the Disputation and the Defence technician will solve technical issues.
Ex auditorio questions: The Chair of Defence will invite the audience to ex auditorio questions. These can be asked orally, by clicking "Participants - Raise hand" in the Zoom menu. The Zoom-host will grant you to speak in the meeting.
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30th. of June 2022 at 10:15 AM, Zoom
Title: "Aerosol formation – chemistry and condensation processes"
I sin avhandling har kandidaten undersøkt miljøpåvirkningen av kjemiske forbindelser som slippes ut i atmosfæren fra karbonfangstanlegg.
Main research findings
The climate crisis necessitates urgent decarbonisation, which can only be achieved through a variety of technologies and solutions. One of them is the chemical capture of CO2 released from industrial point sources and its storage in subsea formations.
On an industrial scale, CO2 is currently captured via reaction with amines, which are small organic molecules that “bind” the CO2 in the flue gas and thereby prevent it from entering the atmosphere. However, in this process trace amounts of amines are released into the atmosphere, where they can form particles and other air pollutants (e.g., nitrosamines) that are harmful to human health and the environment.
In my work, I have initially explored the capability of an ultra-sensitive mass spectrometer to detect traces of amines in the atmosphere. I have furthermore studied the degradation of three amines (tert-butylamine, 2-Amino-2-methyl-1-propanol, and piperazine) under simulated atmospheric conditions in a large outdoor chamber.
The products formed during atmospheric degradation were investigated using state-of-the-art theoretical and experimental methods.
One of the main findings was that amines very efficiently form particles in the atmosphere. I have, for the first time, used an advanced mass spectrometer to characterize the chemical composition of the particles formed from the breakdown of amines.