Re low-carbon cement, how does the Fortera process compare to Brimstone's product, which reportedly has the potential to be carbon-negative and less expensive than conventional cement?
Many apologies for slow reply. As I understand it, the main difference between the two processes is that Fortera uses limestone as the source material and Brimstone uses calcium silicates. In the Fortera case, the CO2 driven off the limestone is captured and reabsorbed after production in the calciner, creating a low/zero carbon cement. Brimstone has no CO2 emissions at any stage because of the different source material. This means that if the heating is done using low carbon energy sources the process can also be net zero. Indeed the Brimstone approach might be net negative if the magnesium in the silicate can be used to capture CO2.
Both approaches seem very interesting but there is now a bewildering variety of different technologies to make low carbon cement and I have little idea as to whether these two companies have technological leadership!
Re low-carbon cement, how does the Fortera process compare to Brimstone's product, which reportedly has the potential to be carbon-negative and less expensive than conventional cement?
https://www.greenqueen.com.hk/carbon-negative-brimstone-cement/
https://www.brimstone.com/
Ken,
Many apologies for slow reply. As I understand it, the main difference between the two processes is that Fortera uses limestone as the source material and Brimstone uses calcium silicates. In the Fortera case, the CO2 driven off the limestone is captured and reabsorbed after production in the calciner, creating a low/zero carbon cement. Brimstone has no CO2 emissions at any stage because of the different source material. This means that if the heating is done using low carbon energy sources the process can also be net zero. Indeed the Brimstone approach might be net negative if the magnesium in the silicate can be used to capture CO2.
Both approaches seem very interesting but there is now a bewildering variety of different technologies to make low carbon cement and I have little idea as to whether these two companies have technological leadership!
Chris
For a quick overview of the "bewildering variety of different technologies", click through the icons at https://www.decarbonizedconcrete.org/