CaliCarbon

CaliCarbon is the capture of CO₂ by the activated oxides, which at the right temperature, quickly reconvert to its carbonate state by capturing any CO₂ from the surrounding gas.

This is the lowest cost method of capturing carbon dioxide from exhausts in coal fired power stations and other fossil fuel burning plants.

The Semidolime contains a unique active magnesium oxide. This oxide when heated in the presence of CO₂ rebinds the CO₂ and the oxide is reversed back into the carbonate form. The Flash Calciner can be installed inside a Calix reactor to capture CO₂ and then release the captured CO₂ into a sequestration system - at the same time returning the magnesium oxide to the input module for the next cycle.

The Calix approach to carbon emissions reduction is a two stage program in which:

• Calix develops zero-emissions calciners for manufacturing its own range of environmentally sustainable products' and then
• Calix uses the capacity of one of its products, Semidolime, to capture CO₂ from any industrial process to on-sell to the emerging sequestrations industry (bio-sequestration, geo-sequestration and the like).

Calix is building its own 20,000 tpa Catalytic Flash Calciner that will capture the pure CO₂ stream released from calcining carbonates while producing active oxides for new products.

Catalytic Flash Calciner

The proposed calciner has a nominal CO₂ production of 15,000 tpa of CO₂. In conventional calciners, this CO₂ is released into the air, with damaging effects. When used with limestone as feedstock, the Calciner production (at 550oC (Mg site calcination) would be:

• 25,000 tpa Magnesia from Magnesite
• 20,000 tpa Semidolime from pure Dolomite
• 25,000 tpa Semidolime from Magnesitic Dolomite

Large scale manufacturing plants of 500,000 tpa CO₂ capacity would use a farm of Calciners.

Zero-Emissions Commercial Calciner

Calix has designed a retrofit CO₂ Capture Module for the Calciner that uses a small fraction of its active oxide output (~2%) to scrub the CO₂ and SO_x from the combustion gases generated from heating the calciner. This module transforms the Calciner into a true zero-emissions process for manufacturing active oxides. The additional energy to run the Capture Module is 7% of the Calciner energy. The process harvests an additional 12,000 tpa of CO₂ and based on present prices for CO₂ capture, it is expected that there would be no economic barrier to adoption of the Zero-Emissions Calciner.