- Title
- The effect of molecular structural variations on the CO2 absorption characteristics of heterocyclic diamines for amine-based post combustion CO2 capture
- Creator
- Robinson, K.; McCluskey, A.; Attalla, M. I.
- Relation
- CHEMECA 2011: Engineering a Better World. CHEMECA 2011: Engineering a Better World (Sydney 18-21 September, 2011)
- Relation
- http://www.conference.net.au/chemeca2011
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2011
- Description
- The reaction between CO₂ and a subset of synthesised novel heterocyclic diamines, including hexahyhropyrimidine (HHPY), 2-methylhexahydropyrimidine (MHHPY) and hexahydropyridazine (HHPZ) have been investigated and compared to piperazine (PZ). The chemical reactions between CO₂ and the heterocyclic diamines were followed insitu using ATR FT-IR spectroscopy. The effect of structural variations on CO₂ absorption was assessed in relation to the prevalent ionic reaction products identified (carbamate versus bicarbonate absorbance), CO₂ absorption capacity and initial absorption rate. HHPY was found to exhibit a similar reactivity toward CO₂ as PZ, with improved aqueous solubility. The α-methyl substituted MHHPY was found to favour HCO₃⁻ formation in the reaction with CO₂. Despite forming predominantly HCO₃⁻, MHHPY exhibited a comparable reactivity to that of the conventional amines MEA and DEA and improved reactivity when compared to the conventional α-methyl substituted primary amine AMP. HHPZ was found to be relatively non-reactive towards CO₂.
- Subject
- carbon dioxide; diamines; combustion
- Identifier
- http://hdl.handle.net/1959.13/1036663
- Identifier
- uon:13341
- Identifier
- ISBN:9780858259225
- Language
- eng
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