Low-Carbon or Carbon-Negative Alternatives to Portland CementTechnologies & Measures
|Technology or Measure||Energy Savings Potential||CO2 Emission Reduction Potential Based on Literature||Costs||Development Status|
|Magnesium Oxide Based Cement|
As the process requires lower thermal energy energy savings are likely to arise.
According to the company, the process of producing 1 ton of Novacem absorbs up to 100 kg more CO2 than what is emitted. It is claimed that for every tonne of ordinary Portland cement replaced by Novacem cement, around 0.75 tonne of CO2 could be captured and stored indefinitely in construction products.
According to the company the production cost of Novocem is similar to the cost of Portland Cement
Production of RecoCement does not require any thermal energy. Electricity is likely to be used for grinding and mixing.
Because only readily available by-products are used, production of RecoCement is claimed to be carbon neutral.
According to the company, every ton of Portland Cement substituted by RecoCement saves around 1 ton of CO2 emissions.
No cost information available.
|CeraTech - Ekkomaxx|
Production of the ekkomaxx does not require the thermal energy.
Every ton of Portland Cement replaced by ekkomaxx approximately 1 ton of CO2 can be saved.
|High Activation Grinding|
For every ton of clinker replaced by fly ash, granulated blast furnace slag, or other additives using mechanical activation grinding, the amount of energy used for the production of one ton of clinker can be avoided which could be in the rage of 3.0 – 5.5 GJ/t clinker in fuel energy and 60 – 100 kWh/t clinker in electricity depending on the technologies used for clinker production and various other factors.
For every ton of fly ash, granulated blast furnace slag, or other additives using mechanical activation grinding process and fuel related CO2 emissions related to one ton of clinker can be avoided.
For every ton of Calera SCM products used, CO2 emissions corresponding to the production of one ton of Portland cement can be avoided.
Thermal and electricity saving potential depends strongly on energy demand for activator production
Fro evergy ton clinker substituted by Geopolymer Cement, approximately 0.52 ton of process related CO2 emissions can be avoided.
Low-Carbon or Carbon-Negative Alternatives to Portland Cement Publications
The report represents the independent research efforts of the European Cement Research Academy (ECRA) to identify, describe and evaluate technologies which may contribute to increase energy efficiency and to reduce greenhouse gas emissions from global cement production today as well as in the medium and long-term future.