CO2 sequestration characteristics in the cementitious material based on gangue backfilling mining method  

作　　者：Peng Wang Xianbiao Mao Shen-En Chen 

机构地区：[1]School of Mechanics and Civil Engineering,China University of Mining&Technology,Xuzhou 221116,China [2]School of Civil and Environmental Engineering,University of North Carolina at Charlotte,Charlotte,NC 28262,USA

出　　处：《International Journal of Mining Science and Technology》2019年第5期721-729,共9页矿业科学技术学报（英文版）

基　　金：the National Natural Science Foundation of China(No.51304207);the Fundamental Research Funds for the Key Laboratory of Coal-based CO2 capture and geological storage,China University of Mining and Technology(No.2016A03).

摘　　要：The increasing anthropogenic CO2 emission and global warming has challenged the China and other countries to seek new and better ways to meet the world’s increasing need for energy while reducing greenhouse gas emissions.The overall proposition of this research is to develop a brand-new CO2 physical and chemical sequestration method by using solid waste of coal mining and cementitious material which are widely used for goaf backfilling in coal mining.This research developed a new testing system(constant temperature pressurized reaction chamber(CTPRC))to study the effects of different initial parameters on mineral carbonation such as different initial water-binder ratio,initial sample porosity and initial carbon dioxide pressure.The experimental results show that the CO2 consumption ratio is 15%,10%and 7%higher with relatively high initial water-binder ratio,initial sample porosity and initial CO2 pressure within 48 h.In addition,some physical and chemical evidence was found through the electron microscope scanning and XRD test to further explain the above test results.This proposed research will provide critical parameters for optimizing CO2 sequestration capacity in this cementitious backfilling material with forming agent.

关 键 词：GANGUE BACKFILLING GOAF Carbon dioxide SEQUESTRATION MINERAL CARBONATION Cementious material 

分 类 号：TD823.7[矿业工程—煤矿开采]