Rags to Riches: Waste Incorporation to Cut Cost and Carbon in the Cement Industry
|出版日期||內容資訊||英文 11 Pages
|水泥產業:廢棄物的水泥原料化，削減成本和碳 Rags to Riches: Waste Incorporation to Cut Cost and Carbon in the Cement Industry|
|出版日期: 2014年03月25日||內容資訊: 英文 11 Pages||
The cement industry is responsible for 6% of anthropogenic carbon emissions. Among the technology options to reduce the carbon footprint, incorporation of industrial waste materials like fly ash and blast-furnace slag provide a cost benefit to the end user, even in absence of a price on carbon. As a result, fly-ash-based cement will grow from a $23 billion market today to $47 billion market by 2018. The higher growth rates for such low-carbon blended cement means an overall rise in carbon emissions, despite a decrease in carbon intensity. However, even moderate penetration of natural gas fuel and concentrated solar thermal energy, as well as higher rates of ordinary portland cement (OPC) substitution, can keep the carbon emissions from rising, despite a 34% rise in cement production over five years. Innovative technologies from companies like Ash Improvement Technology and Ceratech would be needed to increase OPC substitution and reduce capital expenditure via co-generation of treated fly ash in coal power plant boilers.
Corporate sustainability goals and carbon pricing are driving the transition to low-carbon cement. Incorporation of industrial waste is the most cost-effective means to achieve this.
Fly-ash-based cement will rise to a $47 billion market in 2018, but a switch to natural gas and higher OPC substitution may be needed to keep the absolute emissions under check.