Post by microg on Nov 15, 2019 8:38:13 GMT -5
New opportunities to use carbon dioxide (CO2) in the development of products and services are capturing the attention of governments, industry and the investment community. Climate change mitigation is the primary driver for this increased interest, but other factors include technology leadership and supporting a circular economy. This analysis considers the near-term market potential for five key categories of CO2-derived products and services: fuels, chemicals, building materials from minerals, building materials from waste, and CO2 use to enhance the yields of biological processes.
I thought the building materials from waste and CO2 was interesting.
Construction aggregates (small particulates used in building materials) can be produced by reacting CO2 with waste materials from power plants or industrial processes. Among these are iron slag and coal fly ash, which would otherwise be stockpiled or stored in landfill (Figure 7). Producing building materials from waste and CO2 can be competitive as it offsets the cost associated with conventional waste disposal.
Waste materials such as steel slag, bauxite residue and air pollution control (APC) residues are good candidates for conversion into building materials using CO2. Companies in different parts of the world are scaling up businesses using these waste materials; together they consume around 75 kilotonnes (kt) of CO2 annually. The British company Carbon8 uses around 5 kt/yr of CO2 to convert around 60 kt/yr of APC residues into lightweight aggregates as a component of building materials (Carbon8, 2019).
Waste materials such as steel slag, bauxite residue and air pollution control (APC) residues are good candidates for conversion into building materials using CO2. Companies in different parts of the world are scaling up businesses using these waste materials; together they consume around 75 kilotonnes (kt) of CO2 annually. The British company Carbon8 uses around 5 kt/yr of CO2 to convert around 60 kt/yr of APC residues into lightweight aggregates as a component of building materials (Carbon8, 2019).