Vaneric Edward Stein

Oxyfuel conversion of refinery process equipment utilising flue gas recycle for CO2 capture

Publisher Summary This chapter discusses that the CO2 capture project (CCP) is a joint initiative to address problems of CO2 emissions that have the potential to cause climate change. Its objective is to provide significant reductions in CO2 capture and storage costs compared to existing technologies, by developing a range of technology options applied to several real world scenarios. The CCP sponsored feasibility study reported the application of oxyfuel technology on a refinery-wide basis at a typical European refinery. The chapter highlights the technical challenges and costs involved in converting process heaters and boilers to oxyfuel operation using todays commercially proven cryogenic oxygen generation technology and goes on to identify the cost reduction opportunities available from using the next generation of oxygen separation technology: ion transport membranes (ITMs). This new technology, which is integrated with gas turbines, results in a reduction of avoided CO2 cost of from 15% to 50% depending upon the level of integration with the current steam generation within the refinery site.

Revamping Heaters and Boilers to Oxyfiring—Producing Oxygen by Itm Technology

This chapter presents ion transport membranes (ITM) oxygen process, which is based on ceramic membranes that selectively transport oxygen ions when operated at high temperatures. Under the influence of an oxygen partial pressure driving force, the ITM achieves a high flux, high purity (99+ mol%) separation of oxygen from a compressed-air stream. By integrating the non-permeate stream with a gas turbine system, the overall process co-produces high purity oxygen, power, and steam if desired. The chapter investigates three cases; the base case is presented and costed and involves the supply of the complete oxyfuel system with installation and startup and includes all required utilities. In order to provide the hot air for the ITM oxygen process, two Siemens V94.2 combined cycle gas turbines are used and excess power is exported to the local electricity grid. Other cases also use two Siemens V94.2 gas turbines plus a heat recovery steam generator (HRSG) for producing steam.