title: A Model to Stabilize CO2Uptake Capacity during Carbonation-Calcination Cycles and its Case of CaO-MgO.
abstract: Nowadays, capturing anthropogenic CO2in a highly efficient and cost-effective way is one of the most challenging issues. Herein, the key parameters to stabilize CO2uptake capacity have been studied based on four kinds of pure calcium oxides (CaO) prepared by a simple calcination method with four different calcium precursors. A simple ideal particle model was proposed to illustrate the uniform distribution of pure CaO, in which the CO2uptake capacity is positively related with surface area of CaO particles and the stability is opposite to the distance between two CaO particles after carbonation. The adsorption capacity of the best sample with a distance of 398 nm between two CaO particles after carbonation only lost 0.344% per cycle, which is originated from the low possibility of the agglomeration between neighboring particles. On the basis of the proposed model, the composite with magnesium oxide (MgO) distributed uniformly in CaO was fabricated by a simple ball milling method, which possessed an excellent stability with a decay rate of only 3.9% over 100 carbonation-calcination cycles. In this case, MgO played as inert to increase the distance between CaO particles for agglomeration prevention.
authors.affiliation: Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University , Wuhan 430079, China.
authors.forename: Qiancheng
authors.initials: Q
authors.lastname: Zhu
authors.affiliation: Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University , Wuhan 430079, China.
authors.forename: Shibi
authors.initials: S
authors.lastname: Zeng
authors.affiliation: Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University , Wuhan 430079, China.
authors.forename: Ying
authors.identifier: 0000-0002-7680-7180
authors.initials: Y
authors.lastname: Yu
mesh_terms: D000327:Adsorption; D017610:Calcium Compounds; D002245:Carbon Dioxide; D002254:Carbonates; D008277:Magnesium Oxide; D010087:Oxides
chemical_list: D017610:Calcium Compounds; D002254:Carbonates; D010087:Oxides; D002245:Carbon Dioxide; D008277:Magnesium Oxide