Reducing the impact of biomass combustion in residential units on local air quality by using innovative low-loading Pt-based heterogeneous catalyst

• Published in: Biomass & bioenergy 2024-04, Vol.183, p.107147, Article 107147
• Main Authors: Ryšavý, Jiří, Vicente, Estela Alexandra Domingos, Jaroch, Miroslav, Alves, Célia A., Sánchez de la Campa, Ana, Horák, Jiří
• Format: Article
• Language: English
• Subjects: Firewood combustion; Flue gas purification; Honeycomb catalyst; Stove
• ISSN: 0961-9534; 1873-2909
• DOI: 10.1016/j.biombioe.2024.107147

There are several published studies evaluating the potential of platinum and palladium-based catalysts for real flue gas purification, however, the need to reduce the mass fraction of precious metals and the effect of this process is often neglected. This study aimed to assess the influence of two catalysts on the overall flue gas composition formed during combustion in a pellet burner operated to mimic the operation of a real wood log stove. Commercial Pt–Pd-based (CAT A) and Pt-based (CAT B) catalysts with innovative sol-gel coatings and a reduced amount of active substance were used. The CO, OGC and PM conversion rates of CAT A reached 87.8%, 37.0% and 25.2%, while the removal efficiency of CAT B reached 85.8%, 37.8% and 18.8%, respectively. The decrease of organic carbon by the catalysts ranged from 28% to 49% in the case of CAT A and from 13% to 60% in the case of Cat B. The concentrations of PAHs emitted seem to indicate a less carcinogenic composition when catalytic converters are used than without these flue gas treatment units. •Both catalysts are considered as very efficient for the flue gas purification.•Average conversion rate of carbon monoxide was 87.8 % in case of catalyst Cat A.•Average conversion rate of carbon monoxide was 85.8 % in case of catalyst Cat B.•Flue gas treated by both catalysts are less carcinogenic than without the treatment.