English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The CO 2 -capturing performance of a sterically hindered amine, 2-amino-2-hydroxymethyl-1,3-propanediol (AHPD), was systematically studied in this work. First, absorption kinetics was investigated using the stirred-cell technique. At  T  = 308 K, CO 2  reacted with AHPD according to a second-order reaction (rate constant = 264 m 3 /kmol-s), whose activation energy was 33 kJ/mol. Second, the solubility of CO 2  in AHPD at 308 K was measured up to 100 kPa CO 2  partial pressure. For instance, it was shown that the loading capacity of AHPD (2.5 M) was 0.56 mol/mol, while the equilibrium CO 2  partial pressure was 79 kPa. Third, a closed-loop absorber-desorber setup was used to test solvent performance for capturing CO 2  from CO 2 /air mixture (12:88 v/v). The two columns were continuously operated at 313 (absorber) and 383 K (desorber) at 0.1 MPa pressure. Around 75% CO 2  was absorbed using 12 wt. % AHPD (or 0.9 M). The value of Q Reg  (regeneration energy) was 6.28 MJ/kg CO 2 . It was thus evident that AHPD is a credible hindered amine-based solvent. A comparison of its equilibrium, kinetic and regeneration features with 2-amino-2-methyl-1-propanol (AMP) was provided. Finally, three rate promoters–hexamethylene diamine (HMDA), monoethanolamine (MEA) and AMP–were added to AHPD. The performance of HMDA was most promising. In a batch desorption setup, it was shown that alumina catalyst improved desorption of CO 2  from loaded AHPD/HMDA mixtures. This work will stimulate further interest in the use of AHPD solutions for CO 2  removal.

2-Amino-2-hydroxymethyl-1,3-propanediol for CO 2 capture: study on equilibrium, absorption kinetics, catalytic desorption, and amine regeneration