Studies on Development and Characterization of Amines Modified Bentonite Clay Adsorbent for the Adsorption of Carbon Dioxide
The aim of the present work is to systematically investigate the use of amine modified bentonite clay for C02 adsorption. For this purpose, different alkali and alkaline earth and transition metal cation forms of bentonite were treated with protonated mono-, di- and triethanolamine compounds t...
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| Format: | Thesis |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | http://utpedia.utp.edu.my/21202/1/2012%20-CHEMICAL%20-%20STUDIES%20ON%20DEVELOPMENT%20AND%20CHARACTERIZATION%20OF%20AMINES%20MODIFIED%20BENTONITE%20CLAY%20ADSORBENTS%20FOR%20THE%20ADSORPTION%20OF%20CARBON%20DIOXIDE%20-%20ALI%20ELTAYEB%20IBRAHIM.pdf http://utpedia.utp.edu.my/21202/ |
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| Summary: | The aim of the present work is to systematically investigate the use of amine
modified bentonite clay for C02 adsorption. For this purpose, different alkali and
alkaline earth and transition metal cation forms of bentonite were treated with
protonated mono-, di- and triethanolamine compounds to prepare different
ammonium-bentonite adsorbents via ion exchange and d coordination complex
mechanisms respectively. The structural characteristics, thermal analysis and surface
properties of the synthesized materials as well as the raw material were investigated.
C02 adsorption studies were gravimetrically conducted using magnetic suspension
balance equipment under different temperatures and pressures conditions.
The results show that the basal spacings of ammonium-bentonite complexes have
increased with the molar mass of ammonium cations used and a monolayer
configuration of ammonium cations in the interlayer space of bentonite was obtained.
The presence of the common IR peaks of amine compounds has qualitatively
supported the intercalation of ammonium cations in the interlayer space of bentonite.
The thermal analysis of ammonium-bentonite complexes showed three thermal
transition steps which attributed to desorption of the physically adsorbed water and
dehydration, decomposition of intercalated ammonium cations and dehydroxylation
of the structural water of the clay respectively. It was also found that the molar mass
of amine compounds has an inverse effect on the specific surface area of ammonium�bentonite complexes. The presence of carbon, hydrogen and nitrogen in bentonite
after treatment with amine compounds has quantitatively confirmed their intercalation
into the inter layer space of bentonite.
Based on C02 adsorption results, it was found that the C02 adsorption capacities
over all studied ammonium-bentonites have increased by approximately 2.5 times in
comparison with that of untreated bentonite. |
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