Kinetics of Absorption of Carbon Dioxide into Sodium Metaborate Solution

Abstract

Carbon dioxide capture potential of sodium metaborate, which is the main product of the process by means of which hydrogen is obtained from sodium borohydride, was investigated. This work aims at both carbon dioxide capture and finding an alternative use for sodium metaborate. The products of this chemical absorption are sodium carbonate, sodium bicarbonate, and boric acid; all of which are industrially important chemicals. In this study, the kinetics of the reaction between sodium metaborate and carbon dioxide was investigated at atmospheric pressure and temperatures between 17 and 50°C while initial sodium metaborate concentration was changed as 0.5, 1, and 2.5 wt%. The frequency factor and activation energy for this reaction were found as 1.97 × 10−3 m3/mol‐s and 18,062 J/mol, respectively.

Low-cost temperature transition mixtures (TTM) based on ethylene glycol/potassium hydroxide as reversible CO2 sorbents

“…Indeed, boron species has already been recognized as a catalyst for bicarbonate decomposition or CO2 sorbents. [39][40][41][42][43] The mixture EG/KOH/BA 3:1:1 (system B) is a clear and not very viscous liquid. The 13 C NMR spectrum shows that also in this case the peak of EG is practically unaltered (Figure S5).…”

Low-Cost Temperature Transition Mixtures (TTM) Based on Ethylene Glycol/potassium Hydroxide as Reversible CO2 Sorbents

“…sorbents. [41][42][43][44][45] The mixture EG/KOH/BA 3:1:1 (system B) is a clear and not very viscous liquid. The 13 C NMR spectrum shows that also in this case the peak of EG is practically unaltered (Figure S5).…”

Effect of coupling agent on polylactic acid/polypropylene and polylactic acid/polyamide 6 foam composites

“…Furthermore, the phase changes and degradation steps were evaluated from the DSC and TGA thermograms and the results allowed to detect that the Hyd 812 agent was PE-based and was composed of citric acid and sodium bicarbonate, while the Hyd 822 agent was also PE-based and was composed of citric acid. [24][25][26][27][28] Maleic anhydride (MA) used in the PLA-g-MA synthesis was supplied from Sigma-Aldrich, dicumyl peroxide was purchased from Acros Organics, toluene and hexane were supplied from Riedel-de Haen.…”

“…In addition, the inorganic additives in the agent were determined by phase analyzes performed from XRD analysis. Furthermore, the phase changes and degradation steps were evaluated from the DSC and TGA thermograms and the results allowed to detect that the Hyd 812 agent was PE‐based and was composed of citric acid and sodium bicarbonate, while the Hyd 822 agent was also PE‐based and was composed of citric acid 24–28 …”