Biocoal Briquettes Combusted in a Household Cooking Stove: Improved Thermal Efficiencies and Reduced Pollutant Emissions
Biocoal Briquettes Combusted in a Household Cooking Stove: Improved Thermal Efficiencies and Reduced Pollutant Emissions
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在家用炉灶中燃烧生物煤块：提高热效率并减少污染物排放
DOI：
10.1021/acs.est.6b03411
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发表时间：
2017-02-07
影响因子：
11.4
通讯作者：
Li, Duosong
中科院分区：
文献类型：
--
作者：
Qi, Juan;Li, Qing;Li, Duosong
迫切需要清洁燃料来减少家庭烹饪排放。研究了生物质型煤（由生物质和煤粉混合而成）在典型炉灶中燃烧的热效率（eta（th））和污染物排放因子（EF s），并与生物质型煤和型煤进行了比较。通过将无烟煤与10- 30wt%的各种类型的作物秸秆（玉米秸秆、小麦秸秆或稻秸秆）的共混物成型来获得生物煤煤样品。发现节能和PM2.5 EF降低的最佳比例为15-20重量%。在最佳秸秆添加比例下，生物质型煤的eta（th）分别比型煤和生物质型煤提高81-127%和88- 179%，而生物质型煤的可吸入颗粒物（PM2.5）排放量分别降低61-67%和99.0- 99.5%。基于能量的氮氧化物、二氧化硫和有毒元素（砷、硒和铅）的排放系数也显著降低。这些结果表明，生物质型煤可以作为一个有前途的替代国内固体燃料，以减少污染物排放和节约能源。
Clean fuels are urgently needed to reduce household cooking emissions. The thermal efficiencies (eta(th)) and pollutant emission factors (EFs) of biocoal briquettes (made from a mixture of biomass and coal powder) burned in a typical cooking stove were investigated and compared with those of coal briquettes and biomass briquettes. Biocoal briquette samples were obtained by molding blends of anthracite with 10-30 wt % crop straw of various types (maize straw, wheat straw, or rice straw). The optimum proportions for energy savings and PM2.5 EF reduction were found to be 15-20 wt %. Compared with the eta(th) of coal briquettes and biomass briquettes, the eta(th) of biocoal briquettes increased by 81-127% and 88-179%, respectively, with the optimum addition ratios of crop straw, while the delivered energy-based PM2.5 EFs of the biocoal briquettes were reduced by 61-67% and 99.0-99.5%, respectively. Delivered energy-based EFs of NOX, SO2, and toxic elements (As, Se, and Pb) also showed a significant reduction. These results indicated that biocoal briquettes can serve as a promising substitute for domestic solid fuel to reduce pollutant emissions and save energy.