Climate change and its associated impact have been one of the biggest challenges to mankind today. Alternative fuels are therefore sought to reduce the amount of greenhouse gases emission which was believed to be the main reason for global warming. In Malaysia, biomass is available in abundance, thus making it as the preferred renewable energy in comparison with other sources. In the present work, an innovative combustion technique for biomass is proposed, designated as the swirling fluidized bed combustor (SFBC). The SFBC augments the biomass-air mixing through secondary motion created inside the bed. This was achieved by using annular blade distributor which allows inclined injection of air at the bottom of the bed, simultaneously creating fluidization and swirling. The experimental study was carried out using two types of biomass from the palm oil industry, namely the pelletized empty fruit bunch (PEFB) and oil palm shell (OPS). Ultimate and proximate analyses were done to characterize both of the biomass prior to combustion experiments. The effect of excess air on combustion efficiency and emission was studied for four different percentages: 16.55%, 20.07%, 27.91%, and 35.82% at a constant biomass feed rate of 54.26 kg/h for PEFB and 48.91 kg/h for OPS. Emissionmeasured during combustion indicates that the SFBC system is capable of reducing the CO and NO_x for all excess air provided while the increase of CO₂ emission shows that improved conversion of biomass has taken place in the SFBC. Average combustion efficiency of 98.4% was obtained for PEFB and 99.5% for OPS, showing the potential to utilize SFBC in commercial scale in Malaysia.

中文翻译：

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旋转流化床燃烧器中颗粒状空果束和油棕壳的燃烧和排放

气候变化及其相关影响一直是当今人类面临的最大挑战之一。因此，寻求替代燃料以减少温室气体排放量，这被认为是造成全球变暖的主要原因。在马来西亚，生物质资源丰富，因此与其他资源相比，它是首选的可再生能源。在目前的工作中，提出了一种创新的生物质燃烧技术，称为旋流流化床燃烧器（SFBC）。SFBC通过床内产生的二次运动增强了生物质与空气的混合。这是通过使用环形叶片分配器实现的，该叶片分配器允许在床底倾斜注入空气，同时产生流化和涡流。使用棕榈油工业中的两种生物质进行了实验研究，即颗粒状的空果束（PEFB）和油棕壳（OPS）。在燃烧实验之前进行了最终和最接近的分析以表征两种生物质。研究了在PEFB为54.26 kg / h和OPS为48.91 kg / h的恒定生物质进料速率下，过量空气对四个不同百分比的燃烧效率和排放的影响：16.55％，20.07％，27.91％和35.82％。在燃烧过程中测得的排放表明SFBC系统能够减少CO和NO 研究了在PEFB为54.26 kg / h和OPS为48.91 kg / h的恒定生物质进料速率下，过量空气对四个不同百分比的燃烧效率和排放的影响：16.55％，20.07％，27.91％和35.82％。在燃烧过程中测得的排放表明SFBC系统能够减少CO和NO 研究了在PEFB为54.26 kg / h和OPS为48.91 kg / h的恒定生物质进料速率下，过量空气对四个不同百分比的燃烧效率和排放的影响：16.55％，20.07％，27.91％和35.82％。在燃烧过程中测得的排放表明SFBC系统能够减少CO和NO对于提供的所有过量空气，_x，同时增加的CO ₂排放表明，SFBC中生物质的转化率提高了。PEFB的平均燃烧效率为98.4％，OPS的平均燃烧效率为99.5％，表明在马来西亚商业规模使用SFBC的潜力。