Accelerated Carbonation Technology of Reactive MgO-Stabilized Soil for Possible CO2 Sequestration

摘要：

　　Nowadays,the cement industry is under pressure to reduce the carbon footprint and energy demands of cement-based construction materials.Carbonation technology is a process that the Ca-/Mg-alkaline materials can react with CO2 to form stable carbonates,thus it is regarded as a potentially attractive technology of CO2 sequestration,including mineral carbonation,cement/concrete carbonation,and carbonation of reactive MgO-stabilized material.This paper investigates the CO2 uptake of reactive MgO-stabilized soils after accelerated carbonation under the high CO2 concentration(99.9%).The CO2 uptake is examined through the HNO3 acidification test and thermal analysis technology.Key results revealed that the carbonation of reactive MgOstabilized soils could consume large amounts of water and CO2 to produce expansive carbonation products.The CO2 uptake is observably affected by several factors such as MgO content,water content,carbonation time and CO2 pressure.After the several hours carbonation(about 3–6 h),the CO2 uptake can basically achieves about 0.8–1.0 times matter quantity of reactive MgO.

关键词： Accelerated carbonation Reactive MgO Greenhouse gas Sequestration CO2 uptake

作者: Guanghua Cai Songyu Liu Guanghui Shao Guangyin Du Liang Wang

作者单位: School of Civil Engineering,Nanjing Forestry University,Nanjing 210037,China Institute of Geotechnical Engineering,Southeast University,Nanjing 210096,China

会议类型: 国际会议

会议名称: The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)

会议地点: 杭州

会议语种:英文

页码: 73-80

在线出版日期: 2018-10-28（万方平台首次上网日期，不代表论文的发表时间）