Efficiency and Energy Analysis of Power Plants with Amine‐Impregnated Solid Sorbents CO₂ Capture

Abstract

Some of the relevant post‐combustion CCS research trends includes the reduction of the energy consumption required for regeneration. It is a priority to find novel solvents that show high affinity for CO2 together with an ease of regeneration and reuse. Recently, impregnated solid sorbents have been suggested to tackle with these issues. In particular amine‐impregnated solid sorbents require less regeneration energy due to the reduction in water content and the higher heat capacity of solids. As a consequence, they may have the ability to reduce the efficiency penalty of CCS in power plants. Several studies have quantified the efficiency penalty of CO2 capture in commercial power plants with amine absorption. It is generally assumed a reduction of 7–10 efficiency points. Nevertheless, there is not a clear quantification of the effect of solid sorbent capture plants on efficiency penalty. This paper tries to shed some light on this issue. The objective of this work is to demonstrate and quantify the effect on net power and efficiency penalty of using amine‐impregnated solid sorbents when applied as an option to carbon capture. A full process integration of the system and an overall optimisation for power generation have been carried out. Interesting results have been achieved; it is possible to reduce the efficiency penalty down to 6.7 efficiency points. This figure could make feasible the impregnated amine solid sorbent as a future and promising option for CO2 capture.

Fluorinated MIL-101 for carbon capture utilisation and storage: uptake and diffusion studies under relevant industrial conditions

“…Desorption under these conditions is extremely relevant to the adsorbent regeneration step during temperature and pressure swing adsorption processes. 34 Decreasing the energy requirements for this stage is crucial for the cost reduction and feasibility of CCS technologies. 1,34 We observed that both materials, when dry, they were able to desorb $50% of the CO 2 .…”

The Thermodynamics‐Based Benchmarking Analysis on Energy‐Efficiency Performance of CO2 Capture Technology: Temperature Swing Adsorption as Case Study

“…TSA Technology CCS is considered the most economical and feasible way to reduce greenhouse gas emissions and slow future global warming. [25] Among the many ways to achieve carbon capture, such as absorption, adsorption, membrane separation, and cryogenic separation, [26] adsorption carbon capture technology has advantages of low heat consumption (%30% lower than absorption) during regeneration, low thermal energy requirements, a large unit capture capacity, and less equipment requirements for the system. [27] According to the different driving methods for the desorption process, adsorption methods are divided into either TSA or PSA.…”

Adsorptive capture of CO2 by amine‐impregnated activated carbon, pumice, and zeolite 4A

“…However, grafted adsorbents have some benefits such as strong bond interaction between amine and functional groups, accessible pores, and enhancing cycling stability 15 . There are hundreds of scientific papers dealing with the CO 2 adsorption on chemically modified porous materials, but comprehensive information about CO 2 adsorption on modified or functionalized adsorbents is given in the review papers published recently 7,16,31–38 …”

“…15 There are hundreds of scientific papers dealing with the CO 2 adsorption on chemically modified porous materials, but comprehensive information about CO 2 adsorption on modified or functionalized adsorbents is given in the review papers published recently. 7,16,[31][32][33][34][35][36][37][38] Support materials and amines used in the production of amine immobilized sorbents for CO 2 capture have advantages and disadvantages over each other. Therefore, in addition to the above-mentioned properties, there is a need to develop sorbents with high CO 2 holding capacity, especially from postcombustion gas and low cost.…”