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Experimental Study on Energy Consumption and Performance of Hydroxyethyl Ethylenediamine Solution for CO2 Capture

Category: Control Techniques and Strategy

Volume: 9 | Issue: 12 | Pages: 2929-2940
DOI: 10.4209/aaqr.2019.11.0555
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Bingcheng Liu1, Ting Wang 1, Xuan Yang1, Pen-Chi Chiang2

  • 1 Qingdao University of Science and Technology, Qingdao 266061, China
  • 2 Carbon Cycle Research Center, National Taiwan University, Taipei 10672, Taiwan

Highlights

  • The absorption and desorption performance of AEE absorbent are investigated.
  • Experimental analysis of three cycles absorption and desorption of CO2.
  • It provides a better choice for chemical alcohol-amine solvents.

Abstract

Chemical adsorption is a mature post-combustion technology for CO2 capture from large-scale power plants. At present, the traditional monoethanola mine (MEA) absorbent has a few drawbacks, including a low absorption rate, solvent degradation, and high energy consumption, which can restrict the development of absorption technology. Therefore, the application of hydroxyethyl ethylenediamine (AEE) has attracted increasing attention in recent years. In the past, the absorbent performance test was usually measured for a single use, where changes in the performance were rarely mentioned after several absorbent cycles. In the current work, the absorption and desorption performance of AEE absorbents at different concentrations for multiple cycles are investigated. The experimental results indicate that (1) 10 wt% AEE has a higher absorption rate; (2) 20 wt% AEE has a higher absorption, desorption rate, and degree of regeneration, but has higher energy consumption. (3) When the temperature reaches about 85℃, the desorption rate of three different concentrations reaches the highest level, and the desorption rate increases significantly with increases in the solution concentration. (4) After several cycles, the desorption rate and energy consumption of AEE solutions are always keep a great state, so the AEE solution can be used repeatedly.

Keywords

CO2 capture Chemical absorption Hydroxyethyl ethylenediamine(AEE) energy consumption Capture performances


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