Oxyfuel fluidized bed combustion

富氧燃料技术是为数不多的潜在技术之一，可以提供来自化石燃料燃烧的纯二氧化碳流用于封存。 该技术现已发展到使用常规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，富氧循环流化床燃烧（CFBC）是一种很大程度上未开发的技术，即使在氧气燃烧模式下，其也具有比传统煤燃烧更多的潜在优势。 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燃，这提供了以负CO2方式使用这种季节性可用燃料的可能性。 第二，由于CFBC循环大量固体，因此可以减少再循环的烟道气的量，从而使锅炉的尺寸减小高达30%，最后，该技术具有极高的燃料灵活性，从而允许在给定单元中使用来自沥青质、石油焦炭、废煤和褐煤燃料的完整范围的加拿大原料。 目前，CANMET正在与福斯特惠勒和加拿大清洁煤炭电力联盟进行讨论，前者计划在2011年建造一个全面的示范机组，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.