Feasibility study on a two stage benefits CO2 sequestration technology for fossil fuel power generation

The issue of emission and sequestration of green house gas, especially CO2, becomes very hot and attracts international society to pay attention. The power generation plants firing fossil fuels, which is the biggest polluter in the world, emit huge amount CO2 into atmosphere every day and causes a severe environment issue. A segment of the technical processing of Chinese Fertilizer Industry applies spraying aqueous ammonia into synthesis gas to remove CO2 from it for purification. Before composition of H2 and N2 base fine synthesis gas into ammonia, a part of the final product - aqueous ammonia - is re-circulated and sprayed into raw synthesis gas to remove CO2 for its purification. The captured CO2 by ammonia then forms ammonium bicarbonate as byproduct. This processing technology is mature. It has been applied by Chinese Fertilize Industry for more than 40 years. It continues to be used at present. Initiated by this technology, one processing segment of this technology can be borrowed for a purpose of carbon sequestration. Aqueous ammonia may be sprayed into flue gas, exhausted by fossil fuel firing boilers, for carbon sequestration. At the first stage of benefits, the product of ammonium bicarbonate may be utilized as "CO2 Carrier" for further sequestration treatment such as the ocean or geo logic storage to instead CO2 transportation by pipe line or cryogenic. It also can be conventionally used to fertilize plants to absorb more carbon dioxide by photosynthesis. It promotes a positive carbon cycle in the earth. The ammonium bicarbonate is not quite stable when its temperature passes 60 C. During its transportation or being spread into soil, it decomposes into NH4 and bicarbonate and some part of CO2 might re-enter into air. In order to asses the value of this method as a direct "CO2 Sequester" for geologic carbon sequestration, it is necessary to conduct a study to make sure how many CO2 being captured, which will not release and not reenters to air. It is a critical issue. The cost of this type CO2 sequestration sounds effective, and it is especially suitable to developing countries, and attracts them to join international effort on carbon sequestration.