Emerging New Types of Absorbents for Postcombustion Carbon Capture

Abstract

Carbon capture is the most probable technology in combating anthropogenic increase of CO 2 in the atmosphere. Works on developing emerging absorbents for improving carbon capture performance and reducing process energy consumption are actively going on. The most worked-on emerging absorbents, including liquid-liquid biphasic, liquid-solid biphasic, enzymatic, and encapsulated absorbents, already show encouraging results in improved energy efficiency, enhanced CO 2 absorption kinetics, increased cyclic CO 2 loading, or reduced regeneration temperature. In this chapter, the latest research and development progress of these emerging absorbents are reviewed along with the future directions in moving these technologies to higher-technology readiness levels.

A Novel Phase-Changing Nonaqueous Solution for CO2 Capture with High Capacity, Thermostability, and Regeneration Efficiency

“…While the previously reported solvents are attractive in one way or another, it is desirable to develop a solvent with small loss of solvents, high absorption capacity, and having a phase-changing feature (This may significantly reduce the energy loss during regeneration. − ). To this end, several combinations of TETA and organic solvents including PEG200 were examined for CO 2 capture in this study.…”

Process intensification technologies for CO2 capture and conversion – a review

“…The energy penalty during absorbent regeneration could significantly be reduced using novel absorbents, including biphasic absorbents, enzymatic-based and -encapsulated absorbents [36]. In particular, liquid-liquid biphasic absorbents separate into two immiscible liquid phases: a CO 2 -rich phase and a lean phase, at high temperature or during CO 2 absorption.…”

“…In particular, liquid-liquid biphasic absorbents separate into two immiscible liquid phases: a CO 2 -rich phase and a lean phase, at high temperature or during CO 2 absorption. As only the CO 2 -rich phase is sent to the stripper, this leads to process intensification by reducing the stripper size and energy consumption for regeneration [36]. This absorbent is classified as third generation absorbent and Thermal integration Energy efficiency [37] consists of a mixture of amine dissolved in alcohol [48].…”