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Emission of Inorganic PM10 during the Combustion of Spent Biomass from Mallee Leaf Steam Distillation

Gao, Xiangpeng, Yani, Syamsuddin, Wu, Hongwei
Energy & Fuels 2015 v.29 no.8 pp. 5171-5175
biomass, calcium, cineole, combustion, essential oils, feedstocks, furnaces, leaves, magnesium, particulates, potassium, sodium, steam, steam distillation, value-added products
A mallee leaf (∼1 cm long × ∼1 cm wide), termed as “raw leaf”, was distilled in steam for 60 min to extract essential oil (mainly 1,8-cineole) and prepare a spent leaf. The raw and spent leaf samples were size-reduced and sieved to 75−150 μm to prepare samples for combustion in a laboratory-scale drop-tube furnace at 1400 °C in air to investigate the effect of steam distillation on the emission behavior of inorganic particulate matter with an aerodynamic diameter of <10 μm (PM₁₀). The results show that steam distillation has little effect on the yields of PM₁ and the sum of Na, K, and Cl in PM₁. However, it leads to considerable reductions in the yields of PM₁–₁₀ and its key forming elements (Mg and Ca). The reduction in the PM₁–₁₀ yield is another advantage of using the spent leaf as combustion feedstock, in addition to the extraction of 1,8-cineole as a value-added product.