[Stoves] Blends of Biomass and Coal Increase Efficiency and Reduce Emissions

[Tom Miles]

Interesting work on the combination of coal and biomass in Beijing, China. I thought you might be interested in the following content published on the ACS Web Editions Platform:

Biocoal Briquettes Combusted in a Household Cooking Stove: Improved Thermal Efficiencies and Reduced Pollutant Emissions
Juan Qi, Qing Li, Jianjun Wu, Jingkun Jiang, Zhenyong Miao and Duosong Li
Environ. Sci. Technol., Article ASAP
DOI: 10.1021/acs.est.6b03411
Publication Date (Web): January 13, 2017
Copyright © 2017, American Chemical Society
http://pubs.acs.org/doi/abs/10.1021/acs.est.6b03411

Clean fuels are urgently needed to reduce household cooking emissions. The thermal efficiencies (ηth) 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 ηth of coal briquettes and biomass briquettes, the ηth 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.

T R Miles Technical Consultants Inc.
tmiles at trmiles.com
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