Development of amino acid and amino acid-complex based solid sorbents for CO2 capture
writer：Jiang B, Wang X, Gray ML, Duan Y, Luebke D, Li B
keywords：CO2 removal, Amino acid, Amino acid-complex, Solid sorbent, Immobilization
source：期刊
specific source：Appl Energy
Issue time：2013年
For the first time, amino acid (AA) and AA-complex based solid sorbents for CO2 removal were investigated by immobilizing AAs and AA-complex es into porous polymethylmeth acrylate (PMMA) microspheres. Deposition of pure AAs into porous PMMA supports led to limited CO2 adsorption in sorbents, because large AA particles or crystals were formed during deposition of pure AAs into PMMA microspheres and some pores of the PMMA microsphere s were clogged. Among the AA sorbents studied, Arginin e (Arg) solid sorbents had the highest CO2 adsorption capacity. Interestingly, by forming AAcomplexes with other polymers, we substantially improved AA water solubility, achieved uniform immobilization of AAs inside PMMA microspheres, and obtained high CO2 adsorption capacity. We found that the types of AA-complex es, comp lex loading capacity, and ratio of AAs in the complexes could have significant
effects on CO2 adsorption properties. Especially, complexing Arg with a strong polyelectrolyte (i.e. polystyrene sulfonate) resulted in substantiall y improved AA water solubility and high CO2 adsorption capacity. Our developed AA-complex based solid sorbents could be innovative since they could eliminate concerns related to potential equipment corrosion as well as high heat duty associated with aqueous solvent regeneration all the while retaining the advantageous properties (high thermal stability,
excellent biocompatibility, and negligible volatility) of AAs.