Tetraphenyladamantane-Based Polyaminals for Highly Efficient Captures of CO₂ and Organic Vapors

Abstract

Tetraphenyladamantane-based polyaminals with ultrasmall pore, large specific surface area and abundant CO2-philic aminal groups are successfully synthesized, which exhibit simultaneously high CO2 adsorption capacity of 17.6 wt % (4.0 mmol g–1, 273 K/1.0 bar) and high adsorption selectivities of CO2/N2 (104) and CO2/CH4 (24). Especially, at the low pressure, e.g., 0.15 bar, the CO2 uptake at 273 K can reach 8.7 wt % (1.97 mmol g–1). The adsorption/selectivity properties are superior to most of microporous organic polymers (MOPs) reported in the literature. Besides the outstanding CO2-capturing ability, the polymers also possess high uptakes of benzene and cyclohexane vapors up to 72.6 and 52.7 wt %, respectively. In addition, the effects of reaction activity and type of amino groups as well as the size and shape of building blocks on porous architecture of microporous polyaminals are studied. The disclosed results are helpful for the deep understanding of pore formation and interconnecting behavior in MOPs and therefore are of significant importance for the synthetic control of MOPs for a specific application in gas storage and capture of organic vapors.

Porous carbon derived via KOH activation of a hypercrosslinked porous organic polymer for efficient CO2, CH4, H2 adsorptions and high CO2/N2 selectivity

“…Furthermore, using ideal adsorption solution theory (IAST) [50], we can calculate the CO 2 /N 2 and CO 2 /CH 4 adsorption selectivity (Table 2), which also showed similarity with initial slope calculation methods for carbonized COP-M samples. The difference in CO 2 /N 2 selectivity for COP-M as observed between IAST and slope calculation method, is consistent with PAN-2 [51]. As shown in Fig.…”

Porous imine-based networks with protonated imine linkages for carbon dioxide separation from mixtures with nitrogen and methane

“…PIN1 and PIN1_2 exhibit the same CO 2 /N 2 selectivity factor of 30. These values are comparable with other imine-based polymers PAN-1(35),80 APOPs (20-31), 39 PI-1 (27) 40 or other triazine-based polymers NOPs(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39), 82. Nevertheless, these selectivity factors are lower than those of PCN-AD (112),73 …”

An ultra-microporous organic polymer for high performance carbon dioxide capture and separation

“…27,28 ) While) the) former) parameter) endows) higher) surface) energy,) the) latter) parameter) dictates) interacting) behaviour) of) the) sorbent)with)CO 2 )molecules. 29 )For)example:)CO 2 )uptake)capacity)of) BILPD101) particularly) outperforms) SNWD1) polymer) despite) very) similar) textural) properties) (surface) area,) pore) size,) pore) volume)) between)these)two)polymers. 14 )) )…”