title: Study of CO2 cyclic absorption stability of CaO-based sorbents derived from lime mud purified by sucrose method.
abstract: Using lime mud (LM) purified by sucrose method, derived from paper-making industry, as calcium precursor, and using mineral rejects-bauxite-tailings (BTs) from aluminum production as dopant, the CaO-based sorbents for high-temperature CO2 capture were prepared. Effects of BTs content, precalcining time, and temperature on CO2 cyclic absorption stability were illustrated. The cyclic carbonation behavior was investigated in a thermogravimetric analyzer (TGA). Phase composition and morphologies were analyzed by XRD and SEM. The results reflected that the as-synthesized CaO-based sorbent doped with 10 wt% BTs showed a superior CO2 cyclic absorption-desorption conversion during multiple cycles, with conversion being >38 % after 50 cycles. Occurrence of Ca12Al14O33 phase during precalcination was probably responsible for the excellent CO2 cyclic stability.
authors.affiliation: School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
authors.forename: AiHua
authors.initials: A
authors.lastname: Ma
authors.affiliation: School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
authors.forename: QingMing
authors.initials: Q
authors.lastname: Jia
authors.affiliation: School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
authors.forename: HongYing
authors.initials: H
authors.lastname: Su
authors.affiliation: School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
authors.forename: YunFei
authors.initials: Y
authors.lastname: Zhi
authors.affiliation: School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
authors.forename: Na
authors.initials: N
authors.lastname: Tian
authors.affiliation: School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Wu
authors.affiliation: School of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650093, China. shansy411@163.com.
authors.forename: ShaoYun
authors.initials: S
authors.lastname: Shan
mesh_terms: D000535:Aluminum / Q000737:chemistry; D000537:Aluminum Oxide / Q000737:chemistry; D002118:Calcium / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry* / Q000302:isolation & purification; D010087:Oxides / Q000737:chemistry*; D013395:Sucrose; D013696:Temperature
chemical_list: D017610:Calcium Compounds; D010087:Oxides; D002245:Carbon Dioxide; D013395:Sucrose; C016538:lime; D000535:Aluminum; D000537:Aluminum Oxide; D002118:Calcium
keywords: Cyclic capture CO2; Doping; Lime mud; Precalcination; Rejects–bauxite-tailings; Sucrose method