Studies of the coordination effect of DEA-MEA blended amines (within 1 + 4 to 2 + 3 M) under heterogeneous catalysis by means of absorption and desorption parameters
| Autor: | Raphael Idem, Mingqi Cui, Paitoon Tontiwachwuthikul, Min Huang, Junxing Fu, Linhua Jiang, Huancong Shi, Qiming Wu |
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| Rok vydání: | 2020 |
| Předmět: |
Chemistry
Filtration and Separation 02 engineering and technology Solid acid 021001 nanoscience & nanotechnology Heterogeneous catalysis Analytical Chemistry Catalysis Pilot plant 020401 chemical engineering Chemical engineering Desorption Amine gas treating 0204 chemical engineering Absorption (chemistry) 0210 nano-technology Alkaline catalyst |
| Zdroj: | Separation and Purification Technology. 236:116179 |
| ISSN: | 1383-5866 |
| DOI: | 10.1016/j.seppur.2019.116179 |
| Popis: | One of the energy-efficient approach was to adopt amine blends with the combination of heterogeneous catalysts as a new solution for an amine scrubbing process of a coal-fired pilot plant. The major challenge was the contradiction that the energy-efficient amine solvents in the desorber usually behave poorly in the absorber. This study re-investigated the “coordination effect” of “MEA + DEA amine blends” and “heterogeneous catalytic CO2 absorption and CO2 desorption” in theory first, and then conducted the heterogeneous catalytic CO2 absorption with solid alkaline catalyst and CO2 desorption with solid acid catalysts onto 1 + 4 ~ 2 + 3 mol/L MEA + DEA blends. After the comprehensive analyses of the “absorption parameter” and “desorption parameter” into 1.25 + 3.75 to 2 + 3 mol/L blended amines with CaCO3 and blended γ-Al2O3 + H-ZSM-5(2:1), it’s found that the most suitable combination was 1.50 + 3.50 mol/L MEA + DEA with heterogeneous catalysis. This combination was more suitable and applicable to both absorber and desorber with catalytic packing than 2 + 3 mol/L MEA + DEA in an amine scrubbing process of capture pilot plant. |
| Databáze: | OpenAIRE |
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