Solid amine-based adsorbents were widely studied as an alternative to liquid amine for post-combustion CO2 capture(PCC).However,most of the amine adsorbents suffer from low thermal stability and poor cyclic regenerability at the temperature of hot flue gases.Here we present an amine loaded proton type Y zeolite(HY)where the amines namely monoethanolamine(MEA)and ethylenediamine(ED)are chemical immobilized via ionic bond to the zeolite framework to overcome the amine degradation problem.The MEA and ED of 5％,10％and 20％(mass)concentration-immobilized zeolites were charac-terized by X-ray diffraction,Fourier-transform infrared spectroscopy,and N2-196℃adsorption to con-firm the structure integrity,amine functionalization,and surface area,respectively.The determination of the amine loading was given by C,H,N elemental analysis showing that ED has successfully grafted almost twice as many amino groups as MEA within the same solvent concentration.CO2 adsorption capacity and thermal stability of these samples were measured using thermogravimetric analyser.The adsorption performance was tested at the adsorption temperature of 30,60 and 90℃,respectively using pure C02 while the desorption was carried out with pure N2 purge at the same temperature and then fol-lowed by elevated temperature at 150℃.It was found that all the amine@HY have a substantial high selectivity of CO2 over N2.The sample 20％ED@HY has the highest CO2 adsorption capacity of 1.76 mmol·g-1 at 90℃higher than the capacity on parent NaY zeolite(1.45 mmol·g-1 only).The amine@HY samples presented superior performance in cyclic thermal stability in the condition of the adsorption temperature of 90℃and the desorption temperature of 150℃.These findings will foster the design of better adsorbents for CO2 capture from flue gas in post-combustion power plants.

Wanqiao Liang;Jihuan Huang;Penny Xiao;Ranjeet Singh;Jining Guo;Leila Dehdari;Gang Kevin Li

Department of Chemical Engineering,The University of Melbourne,Parkville,Victoria 3010,Australia

中国化学工程学报（英文版）

[1]Wanqiao Liang;Jihuan Huang;Penny Xiao;Ranjeet Singh;Jining Guo;Leila Dehdari;Gang Kevin Li-.Amine-immobilized HY zeolite for CO2 capture from hot flue gas)[J].中国化学工程学报（英文版）,2022(03):335-342

analyser,purge

Amine,immobilized,HY,capture,from,hot,flue,Solid,adsorbents,were,widely,studied,alternative,liquid,post,combustion,PCC,However,suffer,thermal,stability,poor,cyclic,regenerability,temperature,gases,Here,loaded,proton,type,where,amines,namely,monoethanolamine,MEA,ethylenediamine,ED,chemical,via,ionic,bond,framework,overcome,degradation,problem,mass,concentration,zeolites,charac,terized,by,ray,diffraction,Fourier,transform,infrared,spectroscopy,N2,adsorption,firm,structure,integrity,functionalization,surface,area,respectively,determination,loading,was,given,elemental,analysis,showing,that,has,successfully,grafted,almost,twice,many,amino,groups,within,same,solvent,capacity,these,samples,measured,using,thermogravimetric,performance,tested,pure,C02,while,desorption,carried,out,then,fol,lowed,elevated,It,found,all,have,substantial,selectivity,highest,higher,parent,NaY,only,presented,superior,condition,These,findings,will,foster,design,better,power,plants

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