Advances in Post‐Combustion CO₂Capture by Physical Adsorption: From Materials Innovation to Separation Practice

Abstract

The atmospheric CO2 concentration continues a rapid increase to its current record high value of 416 ppm for the time being. It calls for advanced CO2 capture technologies. One of the attractive technologies is physical adsorption‐based separation, which shows easy regeneration and high cycle stability, and thus reduced energy penalties and cost. The extensive research on this topic is evidenced by the growing body of scientific and technical literature. The progress spans from the innovation of novel porous adsorbents to practical separation practices. Major CO2 capture materials include the most widely used industrially relevant porous carbons, zeolites, activated alumina, mesoporous silica, and the newly emerging metal‐organic frameworks (MOFs) and covalent‐organic framework (COFs). The key intrinsic properties such as pore structure, surface chemistry, preferable adsorption sites, and other structural features that would affect CO2 capture capacity, selectivity, and recyclability are first discussed. The industrial relevant variables such as particle size of adsorbents, the mechanical strength, adsorption heat management, and other technological advances are equally important, even more crucial when scaling up from bench and pilot‐scale to demonstration and commercial scale. Therefore, we aim to bring a full picture of the adsorption‐based CO2 separation technologies, from adsorbent design, intrinsic property evaluation to performance assessment not only under ideal equilibrium conditions but also in realistic pressure swing adsorption processes.

Benzene and triazine-based porous organic polymers with azo, azoxy and azodioxy linkages: a computational study

“…The other directions include carbon capture and sequestration processes. [4][5][6][7][8][9][10][11] There are three approaches for carbon capture based on precombustion, oxy-fuel combustion and postcombustion methods, relying on high pressure separation of CO 2 /N 2 , and low pressure separation of O 2 /N 2 and CO 2 /N 2 , respectively. 6 Among other methods, precombustion technology seems quite appealing because it can retrofit existing power plants.…”

Effect of Temperature and MgCl2 Concentration on the Catalytic Pyrolysis of Malt Waste Using Response Surface Methodology

“…Regarding possible biochar applications, some works in the literature recommend its use as an adsorbent for the decolorization of reactive dyes, [80–82] supercapacitor, [83] soil conditioner [84] and CO 2 adsorption material [85] . The high HHV of biochar from non‐catalytic pyrolysis of MW can allow its use as a renewable energy source, while the catalytic biochar can be used as soil amendment and a Mg source for the soil [86] …”

Interfacial Assembly and Applications of Functional Mesoporous Materials

“…Functional mesoporous materials have played a significant role in the application area of the adsorption of CO 2 , which is very important for CO 2 emissions and governance. ,,, From the perspective of rapid adsorption kinetics, how to eliminate the internal and external diffusion of adsorption materials is a key issue. The mesostructure and even hierarchical pore structure of functional mesoporous materials can effectively increase the gas diffusion and mass transfer, which can further improve the adsorption capacity at relatively mild conditions . The early research work on CO 2 adsorption mainly focused on mesoporous silica-based materials.…”

“…The mesostructure and even hierarchical pore structure of functional mesoporous materials can effectively increase the gas diffusion and mass transfer, which can further improve the adsorption capacity at relatively mild conditions. 298 The early research work on CO 2 adsorption mainly focused on mesoporous silica-based materials. Researchers have systematically and comprehensively explored the adsorption properties of mesoporous silica-based materials under different conditions.…”