Encapsulation of 2-amino-2-methyl-1-propanol with tetraethyl orthosilicate for CO2 capture

Abstract

Carbon capture is widely recognised as an essential strategy to meet global goals for climate protection. Although various CO 2 capture technologies including absorption, adsorption and membrane exist, they are not yet mature for post-combustion power plants mainly due to high energy penalty. Hence researchers are concentrating on developing non-aqueous solvents like ionic liquids, CO 2-binding organic liquids, nanoparticle hybrid materials and microencapsulated sorbents to minimize the energy consumption for carbon capture. This research aims to develop a novel and efficient approach by encapsulating sorbents to capture CO 2 in a cold environment. The conventional emulsion technique was selected for the microcapsule formulation by using 2-amino-2-methyl-1-propanol (AMP) as the core sorbent and silicon dioxide as the shell. This paper reports the findings on the formulated microcapsules including key formulation parameters, microstructure, size distribution and thermal cycling stability. Furthermore, the effects of microcapsule quality and absorption temperature on the CO 2 loading capacity of the microcapsules were investigated using a self-developed pressure decay method. The preliminary results have shown that the AMP microcapsules are promising to replace conventional sorbents.

High-throughput microfluidic production of carbon capture microcapsules: fundamentals, applications, and perspectives

“…Additionally, Shi et al [192] utilized KHCO 3 as the form of carbon spheres for CO 2 capture, which exhibited superior CO 2 capture performance with a CO 2 uptake of up to 4.26 mmol•g −1 at 25 • C and 1 bar. Rama et al [193] used 2-amino-2-methyl-1-propanol (AMP) as the core sorbent in microcapsules, demonstrating its high CO 2 sorption capacity and its potential applicability in industrial settings. Finn and Galvin [194] proposed a mechanistic model for mass transfer and chemical reaction to predict microcapsule performance under different scenarios.…”

Recent Progress on CO2 Capture Based on Sterically Hindered Amines: A Review

“…For the purpose of enhancing the CO 2 absorption rate of the SHA absorbents, increasing the contact area between absorbent and CO 2 is also a method, which is considered to be more effective and feasible. Rama et al 117 employed conventional emulsification methodologies to fabricate microcapsules comprising AMP as the core absorbent and silica dioxide as the shell material, with a subsequent report on the comprehensive characterization of the microcapsules, encompassing formulation optimization, microstructural analysis, size distribution profiling, and thermal cycling stability evaluation. Yang et al 118 used the addition of microgel particles to amine solutions to improve the CO 2 capture efficiency.…”

Theoretical and experimental study on the fluidity performance of hard-to-fluidize carbon nanotubes-based CO2 capture sorbents

“…To limit the CO 2 emissions which arise from the burning of large volumes of fossil fuels to satisfy the increasing energy demand, significant efforts and investigations have been devoted to developing CO 2 capture and storage technologies [1,2]. Among all the proposed alternatives, e.g., membrane [3], absorption [4], adsorption [5], etc., the development of promising solid sorbents, e.g., zeolites [6], MgO [7], alkali-based [8], carbon nanotube (CNT) [9], CaO [10], metal-organic frameworks [11,12], etc. with good adsorption/regeneration and superior regeneration properties has received more attention recently as a potentially inexpensive technique.…”