Study type

Major parameters

Main findings

Reference

Thermal performance and emission characteristics of unvented biomass-burning cook stoves: A proposed standard method for evaluation

・ measure emissions of air pollutants

・ emission factors for the three metal stoves tested burning Acacia nilotica ranged between 13 and 68 g∙kg⁻¹ for CO and between 1.1 and 3.9 g∙kg⁻¹ for total suspended particulates and to increase with increasing thermal efficiency both within and across stoves

[91]

Major gaseous and PAH emissions from a fluidized-bed combustor firing rice husk with high combustion efficiency

・ investigate CO, NO_x and PAH emissions from a 400 kW_th fluidized-bed combustor with a cone-shaped bed, over 99%, combustion efficiency

・ excess air had substantial effects on the axial CO and NO_x concentration profiles

・ the total PAHs emission was predominant for the coarsest ash particles

・ the highest emission was shown by acenaphthylene, 4.1 μg/kWh, when the total yield of PAHs via fly ash was about 10 μg/kWh.

[95]

Emissions from multiple-spouted and spout-fluid fluidized beds using rice husks as fuel

・ investigate emissions of CO and CO₂ on different configurations of spout-fluidized beds

・ vary level of excess air, different primary-to- secondary air ratios at each level of excess air and method of feeding

・ emission of CO seemed to be lower with under-bed feeding of the rice husk fuel compared to over-bed feeding

・ CO₂ emissions independent of method of feeding

・ changes in excess air levels influenced the emissions of CO and CO₂ within the excess air range investigated

・ emission of CO was less at 10% excess air with over-bed feeding; emission of CO in the case of under-bed feeding was lowest at 20% excess air level

・ emission of CO was less in the spout-fluid bed than CO in the multiple-spouted bed.

[96]

Combustion and emission characteristics of a swirling fluidized-bed combustor (SFBC) burning moisturized rice husk

・ the swirling fluidized-bed combustor was tested at a constant fuel feed rate (of about 80 kg/h) for six fuel-moisture contents (from 8.4% to 35%)

・ with increasing fuel-moisture content, the emission of NO from the combustor apparently reduced, while the emission of CO was adjusted at a quite low level due to the effects of secondary air

・ effective least-cost control of both NO and CO emissions with over 99% combustion efficiency are achievable when firing moisturized rice husk

[97]

GHG emission mitigation potential of rice husks for An Giang province, Vietnam

・ to evaluate the GHG emission mitigation potential of rice husk utilization through life cycle inventory analysis

・ CH₄ and N₂O emissions from open burning contribute largely to the current GHG emissions

・ briquettes can contribute to GHG emission mitigation as the production is more efficient than rice husk burning or dumping

・ Gasification the most efficient GHG mitigator

[98]