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Demonstrating the Suitability of Tamarind Residues to Bioenergy Exploitation Via Combustion Through Physicochemical Properties, Performance Indexes, and Emission Characteristics
BioEnergy Research ( IF 3.6 ) Pub Date : 2020-06-22 , DOI: 10.1007/s12155-020-10158-z
José Luiz Francisco Alves , Jean Constantino Gomes da Silva , Guilherme Davi Mumbach , Michele Di Domenico , Rennio Felix de Sena , Ricardo Antonio Francisco Machado , Cintia Marangoni

Clean thermochemical conversion of lignocellulosic residues is particularly interesting for both bioenergy production and environmental protection. For this reason, the novelty of this study is to present tamarind residues (husks and seeds) from the tamarind fruit processing industry as new prospective feedstocks for bioenergy production considering their physicochemical properties, combustion performance indexes, and emission patterns. Characterization results confirmed the suitability of tamarind residues as raw materials for combustion with considerable energy contents (~ 17.5 MJ kg−1), ash contents below 2.9 wt.%, and negligible sulfur (< 0.01 wt.%). High bulk (552.7–635.8 kg m−3) and bioenergy (9.1–10.4 GJ m−3) densities were found, indicating that the distribution and utilization of tamarind residues are significantly favored. Acceptable CO2, CO, and SO2 emissions were found during the combustion of both residues. Elevated nitrogen concentrations (2.5–3.0 wt.%) were reported, implying higher NOX emissions (8.8–10.5 g kg−1), which require rigid control. The combustion performance indices suggest that tamarind residues have better properties for combustion than feedstocks commonly used as bioenergy sources. Tamarind residues thus appear to be promising renewable feedstocks for bioenergy because of their attractive properties, better combustion performance, and acceptable emission characteristics. This study conclusively indicates that tamarind residues are promising feedstocks for bioenergy and provides valuable insights to their future applications in commercial biomass boilers with controlled emissions.



中文翻译:

通过理化性质,性能指标和排放特征证明罗望子残基通过燃烧生物能源开发的适用性

木质纤维素残留物的清洁热化学转化对于生物能源生产和环境保护都特别有意义。因此,这项研究的新颖之处在于考虑到它们的理化特性,燃烧性能指标和排放模式,将来自罗望子果加工工业的罗望子残渣(果壳和种子)作为生物能源生产的新预期原料。表征结果证实了罗望子残渣作为燃烧原料的适用性,具有相当大的能量含量(〜17.5 MJ kg -1),灰分含量低于2.9 wt。%和可忽略不计的硫(<0.01 wt。%)。高散装(552.7–635.8 kg m -3)和生物能(9.1–10.4 GJ m -3)的密度被发现,表明罗望子残基的分布和利用受到显着促进。在两种残留物的燃烧过程中均发现了可接受的CO 2,CO和SO 2排放。据报道氮浓度升高(2.5–3.0 wt。%),这意味着更高的NO X排放量(8.8–10.5 g kg -1),需要严格控制。燃烧性能指标表明,罗望子残渣的燃烧性能比通常用作生物能源的原料更好。因此,罗望子残渣因其吸引人的特性,更好的燃烧性能和可接受的排放特性,似乎是有前途的生物能源原料。这项研究最终表明,罗望子残渣是有前途的生物能源原料,并为它们在可控排放的商用生物质锅炉中的未来应用提供了宝贵的见识。

更新日期:2020-06-22
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