# Experimental Study on Renewable Porous Carbon Dioxide Adsorbent Materials for Space Shuttles
###### Abstract  
Porous adsorbent material is promising to be used to regeneratively remove CO\({}_{2}\) from space shuttles. In this work, the amount and isosteric heat of CO\({}_{2}\) adsorption in solid amine are experimentally studied at pressures ranging from 0 to 6 bar and temperatures ranging from 20 \({}^{\circ}\)C to 60 \({}^{\circ}\)C. The amount and isosteric heat of water adsorption in the solid amine is tested at different humidities (relative humidity 30-80%). The effective thermal conductivity of the solid amine at different atmospheres (air, N\({}_{2}\), CO\({}_{2}\) and water), pressures and temperatures is also investigated. The results show that the best temperature for CO\({}_{2}\) adsorption in the solid amine is 45 \({}^{\circ}\)C under dry conditions. The amount of water adsorption increases with enhanced humidity, while the isosteric heat of water adsorption remains a constant value. The effective thermal conductivity of the solid amine increases with an increase in pressure. The adsorbed phase (CO\({}_{2}\) and water) in the solid amine makes a contribution to improving the effective thermal conductivity of solid amine particles. The above findings can help design a better adsorption system in space. space shuttle; porous solid amine adsorbent materials; CO\({}_{2}\) adsorption; effective thermal conductivity 2022154947.15.3390/en15144947.15. results showed that a dual-column TVSA with solid 13X could be a promising CO\({}_{2}\) capture technology. [PERSON] et al. [8] evaluated the adsorption behavior of CO\({}_{2}\) on solid amine adsorbent in simulated flue gas. The effects of amine, temperature, moisture and other factors on the CO\({}_{2}\) adsorption performance of the adsorbent were investigated. The results showed that amine-functionalized XAD-4 resin is a promising adsorbent for CO\({}_{2}\) adsorption. [PERSON] et al. [9] studied CO\({}_{2}\) adsorption on mesoporous silica modified with amines by double functionalization. The adsorption microcalorimetric study suggests a change in active site distribution as the amine density increases. [PERSON] et al. [10] studied amine-oxide mixed materials for CO\({}_{2}\) separation from the bio-hydrogen model. BET analysis confirmed that due to the low surface area of the adsorbent system, the high amine load contributed to the reduction in CO\({}_{2}\) adsorption. [PERSON] et al. [11] synthesized a new type of composite adsorbent by the amine modification of binder-containing zeolite 4A bodies, and its potential application in post-combustion CO capture was evaluated. [PERSON] et al. [12] developed an amine-modified silica adsorbent with high amine efficiency and fast adsorption speed for CO\({}_{2}\) capture by adding amines, including hydroxyl, into mesoporous silica loaded with polyethylene imine (PEI). The adsorbent had good reversibility and the adsorption capacity was basically stable after two adsorption-desorption cycles. [PERSON] et al. [13] directly modified polyacrylamide(PAN) fibers with amination reagent and prepared a series of amine-containing solid fiber absorbents, including diethylenediamine (DETA), triethylenetetraamine (TETA), tetraethylenepentamine (TETA), and polyethylene imine (PEI). The results showed that the chemical modification of PAN fiber with amine compounds could significantly improve the adsorption capacity of amine adsorbent for CO\({}_{2}\). [PERSON] et al. [14] prepared solid amine adsorbents by the suspension polymerization of divinylbenzene (DVB) and acrylonitrile (AN), and then amination with TETA. The factors affecting the adsorption performance of solid amine adsorbents for CO\({}_{2}\), such as amine type, adsorption temperature and moisture, were investigated. [PERSON] et al. [15] selected commercial porous phenolic resin (XAD-761) as the carrier material to prepare solid amine sorbents.