Oxyfuel fluidized bed combustion

氧气燃料技术是为数不多的潜在技术之一，可以提供化石燃料燃烧产生的纯二氧化碳流进行封存。该技术目前已进入使用传统悬浮燃烧技术的示范阶段，并计划建造高达600兆瓦的机组。相比之下，富氧循环床燃烧(CFBC)是一项很大程度上未被开发的技术，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，循环沸腾床能够燃烧大范围的燃料，并在任何所需范围内与生物质共燃，这提供了以二氧化碳负面方式使用此类季节性燃料的可能性。其次，由于CFBC循环大量固体的事实，可以减少回收的废气量，从而使锅炉的尺寸缩小30%，最后，该技术具有极高的燃料灵活性，从而允许在给定的装置中使用从沥青质、石油焦、废煤和褐煤燃料在内的各种加拿大原料。目前，CANMET正在与福斯特·惠勒(Foster Wheeler)和加拿大清洁煤发电联盟(Canada Clean-Coal Power Coalition)进行谈判，后者计划在2011年建造一个全面的示范机组，以支持这些发展。

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.