Oxyfuel fluidized bed combustion

氧燃料技术是少数几种有潜力的技术之一，可以提供化石燃料燃烧产生的纯二氧化碳流进行封存。该技术现在已经发展到使用传统悬浮燃烧技术的示范阶段，并计划建造600兆瓦的机组。相比之下，含氧循环流化床燃烧（CFBC）在很大程度上是一种尚未开发的技术，即使在氧气燃烧模式下，它也比传统的煤炭燃烧具有许多潜在的优势。首先，循环流化床能够燃烧大范围的燃料，并在任何期望的范围内与生物质共火，这提供了以负二氧化碳方式使用这种季节性可用燃料的可能性。其次，由于CFBC循环大量固体，因此有可能减少被回收的烟气量，从而使锅炉的尺寸减少多达30%，最后，该技术具有极大的燃料灵活性，因此可以在给定的装置中使用来自沥青质，石油焦，废煤和褐煤燃料的全部加拿大原料。目前CANMET正在与福斯特惠勒公司（Foster Wheeler）和加拿大清洁煤炭能源联盟（Canadian Clean-Coal Power Coalition）进行讨论，前者计划在2011年建造一个全面的示范装置，后者将支持这些发展。

Oxyfuel Technology is one of the few potential technologies that can offer pure streams of CO2 from the combustion of fossil fuels for sequestration. The technology has now advanced to the stage of demonstration in using conventional suspension fired technology, and there are plans to build units as large as 600 MWe. Oxyfuel Circulating Fluidized Bed Combustion (CFBC) is by contrast a largely unexplored technology, which has a large number of potential advantages over conventional coal burning even in the oxygen fired mode. First, Circulating Fluidized Beds are able to burn a large range of fuels, and co-fire with biomass over any desired range, which offers the possibility of using such seasonally available fuels in a CO2 negative fashion. Second, because of the fact that CFBC circulate large amounts of solids it is possible to reduce the amount of flue gas being recycled thus allowing a size reduction of the boiler by up to 30%, and finally the technology is extremely fuel flexible thus allowing a complete range of Canadian feedstocks from asphaltenes, petroleum cokes, waste coal and lignitic fuels to be used in a given unit. At the moment CANMET is in discussions with both Foster Wheeler who are schedule to build a full-scale demonstration unit in 2011, and the Canadian Clean-Coal Power Coalition to support these developments.