Capturing and storage of CO_2 by micron-nano minerals:Evidence from the nature  

作　　者：MAO Xumei TIAN Xike YU Chengyong 

机构地区：[1]School of Environmental Studies and School of Material Sciences and Chemical Engineering, China University of Geosciences, Wuhan 430074, China

出　　处：《Chinese Journal Of Geochemistry》2011年第4期569-575,共7页中国地球化学学报

基　　金：supported jointly by the National Natural Science Foundation of China (Grant No.40602031);the Fundamental Research Funds for the Central Universities (Grant No.CUGL090213);the Natural Science Foundation of Hubei Province (Grant No.2011045003)

摘　　要：The increase of CO2 in atmosphere is a main factor leading to "greenhouse effect", which causes more and more serious global environmental problems. The reduction of CO2 is a challenge for the survival of human beings, and it is also a big technical problem. CO2 fluid-rock interaction is a key scientific problem involved in geo-logical storage. The CO2 fluid-rock interaction has a variety of multi-scale changes. Due to great differences in the quantity of surface atoms and surface energy between micron-nano-sized minerals, and ions and crystals, the speed and efficiency of CO2 fluid-rock interaction on a micron-nano scale are much higher than those on other scales. As is known from the natural world, the micron-nano structures of pores and the surface chemical modification of natural porous minerals (zeolite, diatomite, sepiolite, palygorskite, halloysite, etc.) should be further investigated, which can be used as the micron-nano -mineral porous materials with high capacity and high efficiency for capturing CO2. Through simulating the adsorption capacity and process of CO2 by minerals in the natural world, the micron-nano technology is applied to calcium- and magnesium-based minerals (olivine, pyroxene, feldspar, clay, etc.) so as to improve the activity of calcium and magnesium and enlarge the reaction contact area. In this way, the efficiency of capturing and storage of CO2 by calcium- and magnesium-based minerals can be greatly improved. These minerals can also be used as the micron-nano-mineral materials with large capacity and high efficiency for capturing and storing CO2.The increase of CO2 in atmosphere is a main factor leading to ＂greenhouse effect＂, which causes more and more serious global environmental problems. The reduction of CO2 is a challenge for the survival of human beings, and it is also a big technical problem. CO2 fluid-rock interaction is a key scientific problem involved in geological storage. The CO2 fluid-rock interaction has a variety of multi-scale changes. Due to great differences in the quantity of surface atoms and surface energy between micron-nano-sized minerals, and ions and crystals, the speed and efficiency of CO2 fluid-rock interaction on a micron-nano scale are much higher than those on other scales. As is known from the natural world, the micron-nano structures of pores and the surface chemical modification of natural porous minerals （zeolite, diatomite, sepiolite, palygorskite, halloysite, etc.） should be further investigated, which can be used as the micron-nano -mineral porous materials with high capacity and high efficiency for capturing CO2. Through simulating the adsorption capacity and process of COs by minerals in the natural world, the rnicron-nano technology is applied to calcium- and magnesium-based minerals （olivine, pyroxene, feldspar, clay, etc.） so as to improve the activity of calcium and magnesium and enlarge the reaction contact area. In this way, the efficiency of capturing and storage of CO2 by calcium- and magnesium-based minerals can be greatly improved. These minerals can also be used as the micron-nano-mineral materials with large capacity and high efficiency for capturing and storing CO2.

关 键 词：二氧化碳排放量 纳米尺度 矿物质 微米 储存 捕获 纳米矿物材料 证据 

分 类 号：TB383[一般工业技术—材料科学与工程] X16[环境科学与工程—环境科学]