Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture

Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture

Bibliographic Details
Main Author: Gao, Teng, Gao
Language:English
Published: University of Akron / OhioLINK 2018
Subjects:
Polymer Chemistry
Polymers
Methylation
Adsorption
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=akron1522428169157346
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-akron15224281691573462021-08-03T07:05:42Z Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture Gao, Teng, Gao Polymer Chemistry Polymers Methylation Adsorption Partially methylated polyethyleneimine (PEI) by Cu coordination was developed for the NO<sub>X</sub>, SO<sub>2</sub>, CO<sub>2</sub> capture in this study. PEI, which consists of primary, secondary, and tertiary amines, was coordinated with Cu for the partial protection of amine groups from methylation. After the methylation process, potassium hydroxide (KOH) was used to extract Cu from the methylated mixture in order to obtain the partially methylated PEI. The investigation of the effect of Cu on the methylation of primary and secondary amines into tertiary amines and the adsorption/desorption pathways of NO<sub>X</sub>, SO<sub>2</sub>, CO<sub>2</sub> have been studied by in situ infrared (IR) spectroscopy. Meanwhile, mass spectrometry and X-ray fluorescence spectrometry (XRF) were used to confirm the partial methylation of PEI and Cu distribution, respectively. It was found that Cu can serve as a protective agent to coordinate with PEI during the methylation process. CO<sub>2</sub> can completely desorb from partially methylated PEI sorbent while SO<sub>2</sub> can partially desorb from partially methylated PEI sorbent after temperature-programmed desorption (TPD), resulting from the remaining of un-methylated primary/secondary amines on partially methylated PEI. On the other hand, it was difficult for NO<sub>X</sub> to desorb from the partially methylated PEI sorbent. By adjusting the ratio of primary/secondary amine to tertiary amine, the binding energy between acidic gases and PEI could be fine-tuned. 2018-06-11 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1522428169157346 http://rave.ohiolink.edu/etdc/view?acc_num=akron1522428169157346 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Polymer Chemistry
Polymers
Methylation
Adsorption
spellingShingle Polymer Chemistry
Polymers
Methylation
Adsorption
Gao, Teng, Gao
Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture
author Gao, Teng, Gao
author_facet Gao, Teng, Gao
author_sort Gao, Teng, Gao
title Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture
title_short Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture
title_full Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture
title_fullStr Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture
title_full_unstemmed Controllable Methylation of Polyethyleneimine by Cu Coordination for NO<sub>X</sub>, SO<sub>2</sub>, and CO<sub>2</sub> Capture
title_sort controllable methylation of polyethyleneimine by cu coordination for no<sub>x</sub>, so<sub>2</sub>, and co<sub>2</sub> capture
publisher University of Akron / OhioLINK
publishDate 2018
url http://rave.ohiolink.edu/etdc/view?acc_num=akron1522428169157346
work_keys_str_mv AT gaotenggao controllablemethylationofpolyethyleneiminebycucoordinationfornosubxsubsosub2subandcosub2subcapture
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