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Synergistic effect of additives and blend on sulfur retention, NO release and ash fusibility during combustion of biomass briquettes
International Journal of Green Energy ( IF 3.3 ) Pub Date : 2020-12-07 , DOI: 10.1080/15435075.2020.1847116
Kuihua Han 1, 2 , Xian Li 1, 2 , Jianhui Qi 1, 2 , Yingquan Zhu 3 , Shenwei Long 3 , Haopeng Li 1, 2 , Shengli Niu 1, 2 , Shujuan Li 4 , Yang Xu 4
Affiliation  

ABSTRACT

Even though biomass is carbon-neutral renewable energy, the utilization of biomass results in sulfur oxides (SO x ), nitrogen oxides (NO x ) and particles emissions. Biomass briquetting and doping with additives are potential methods to ease these emissions. However, additives may increase the price for biomass application. Hence, another method is mixing different kind of biomass which possesses significant difference in ash composition, i.e. using synergistic effect to ease these emissions. In this study, the effect of blending of tree bulk and wheat straw and additives on SO2, NO emissions from briquettes combustion were studied. Experimental results indicate that the emission of SO2 and NO from the mixed briquettes would decrease due to the synergistic effect. An appropriate weight mixing ratio between tree bulk and wheat straw was recommended. The method of mixing raw materials would potentially save additives and reduce the cost of biomass briquettes. The SO2 and NO emission would further decrease and the ash fusibility could be improved obviously for the mixed briquettes modified by CaO, CaCO3, and NH4H2PO4. The NO emissions for the briquettes are much lower during the combustion temperature of 800°C 1000°C. This study may contribute to modification, additives, clean combustion, and economy for the utilization of biomass fuel.



中文翻译:

添加剂和掺混物对生物质团块燃烧过程中的硫保留,NO释放和灰烬易熔性的协同作用

摘要

即使生物质是碳中和的可再生能源,生物质的利用也会导致硫氧化物(SO x),氮氧化物(NO x)和颗粒物排放。生物质团块化和掺杂添加剂是缓解这些排放的潜在方法。但是,添加剂可能会增加生物质应用的价格。因此,另一种方法是混合灰分组成具有显着差异的不同种类的生物质,即使用协同效应缓解这些排放。在这项研究中,研究了树木和麦秸混合以及添加剂对煤球燃烧过程中SO 2和NO排放的影响。实验结果表明,SO 2的排放 混合团块中的NO由于协同作用而减少。建议在树皮和麦草之间使用适当的重量混合比。混合原料的方法将潜在地节省添加剂并降低生物质团块的成本。CaO,CaCO 3和NH 4 H 2 PO 4改性后的混合团块,SO 2和NO的排放量进一步减少,灰烬的熔融性得到明显改善。在燃烧温度为800°C至1000°C时,团块的NO排放量要低得多。这项研究可能有助于改性,添加剂,清洁燃烧以及生物质燃料利用的经济性。

更新日期:2020-12-28
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