(12c) Carbon Capture in Cracking Furnaces
AIChE Spring Meeting and Global Congress on Process Safety
2010
2010 Spring Meeting & 6th Global Congress on Process Safety
The 22nd Ethylene Producers’ Conference
CO2 Emissions – Regulations and Technologies to Meet the Growing Challenges
Monday, March 22, 2010 - 9:25am to 9:55am
Carbon capture and storage (CCS) will be an important part of the greenhouse gas mitigation portfolio if ambitious targets as stabilization of atmospheric CO2 concentration at a level of 450 ppm should be met. Besides the energy sector also other CO2 emission intense sectors as fuel processing, iron & steel, cement, pulp and paper, and chemicals production will have to contribute to this process.
This paper presents a techno-economic study of carbon capture from an ethylene production plant. First, the main trends of carbon capture in the power plant sector and the boundary conditions for a transition of these techniques to the chemical sector, i.e. an ethylene plant, will be discussed.
The boundary conditions regarding type of feed and product related CO2 emissions are presented. The applicability of capture technologies is discussed and capture of CO2 by the oxyfuel- and post-combustion process is investigated.
The application of oxyfuel-combustion allows for increased efficiency in the radiant section compared to air/fuel combustion and therefore gives additional benefit for the use of this type of technology. In contrast, post-combustion capture can be regarded as an add-on solution with fewer changes to the cracking furnace, if low pressure steam for regeneration of the solvent is available. A case study for CO2 capture from a set of five cracking furnaces with 100 MW firing duty each is conducted.
The resource and utility requirements for both capture technologies are evaluated and compared to a base case scenario under CO2 emission trading. Furthermore, capture costs are calculated and the preferential choice of capture technology is discussed related to the carbon prices in emission trading scheme.
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2010 Spring Meeting & 6th Global Congress on Process Safety
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