Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore.
Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore.
Bioresour Technol. 2013 Oct;146:371-378. doi: 10.1016/j.biortech.2013.07.072. Epub 2013 Jul 25.
In this study, thermal characteristics of raw biomass, corresponding pyrolytic biochars and their blends with lignite were investigated. The results showed that pyrolytic biochars had better fuel qualities than their parent biomass. In comparison to raw biomass, the combustion of the biochars shifted towards higher temperature and occurred at continuous temperature zones. The biochar addition in lignite increased the reactivities of the blends. Obvious interactions were observed between biomass/biochar and lignite and resulted in increased total burnout, shortened combustion time and increased maximum weight loss rate, indicating increased combustion efficiencies than that of lignite combustion alone. Regarding ash-related problems, the tendency to form slagging and fouling increased, when pyrolytic biochars were co-combusted with coal. This present study demonstrated that the pyrolytic biochars were more suitable than raw biomass to be co-combusted with lignite for energy generation in existing coal-fired power plants.
本研究考察了生生物质、相应热解生物炭及其与褐煤混合物的热特性。结果表明，热解生物炭的燃料性能优于其母体生物质。与生生物质相比，生物炭的燃烧向更高温度转移，并在连续温度区域发生。褐煤中添加生物炭增加了混合物的反应性。在生物质/生物炭和褐煤之间观察到明显的相互作用，导致总燃尽增加、燃烧时间缩短和最大失重率增加，表明燃烧效率高于单独燃烧褐煤。关于灰分相关问题，当热解生物炭与煤共燃烧时，形成结渣和积灰的趋势增加。本研究表明，与生生物质相比，热解生物炭更适合与褐煤共燃烧，以在现有燃煤电厂中发电。
