The use of transition mixed oxides catalysts for CO and hydrocarbons oxidation as an option to reduce emissions from small combustion devices

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F24%3A10255915" target="_blank" >RIV/61989100:27710/24:10255915 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The use of transition mixed oxides catalysts for CO and hydrocarbons oxidation as an option to reduce emissions from small combustion devices

Popis výsledku v původním jazyce

The results were presented at the 16th Pannonian International Symposium on Catalysis, which was held in Seggau (Styria, Austria), 1 - 5 September, 2024.The burning of wood, like the burning of other solid fuels, produces pollutants that have a negative impact on the environment and human health. In order to protect both, limits have been set for combustion plants to comply with. At present, manufacturers of small combustion plants (e.g. stoves) mainly use primary technologies to reduce emissions (change of combustion air intake, optimisation of the combustion chamber, inclusion of an afterburner, etc.), but it is expected that secondary technologies, e.g. addition of a catalyst in the flue gas path, will also be necessary [1].The aim of this work is to study transition metal mixed oxide (TMMO) based catalysts for the catalytic oxidation of CO, propane and methane as a typical waste gas pollutants from biomass combustion in domestic stoves. TMMOs represent an interesting alternative to currently used precious metals (mostly Au, Ag, Pd and Pt) based catalysts [1].Six Co and Cu based MMOs have been prepared by co-precipitation method from corresponding nitrates and tested in CO, C3H8 and CH4 oxidation reaction at temperature range of 100-500 oC. Reaction mixtures was composed of 10 vol.% of O2 and a) 100 ppm CH4 + 2500 ppm CO, b) 100 ppm C3H8 + 2500 ppm CO and c) 100 ppm CH4 + 100 ppm C3H8 + 2500 ppm CO, balanced with N2 were used. The catalytic experiments were performed in stainless steel reactor (din= 6 mm) and reaction products were analyzed on GC (Hewlett Packard, HP6890 series) with TCD and FID analyzer and ShinCarbon column. Tested samples were characterized by AAS, XRD, N2 physisorption and temperature programmed techniques (TPD-CO2, TPD-NH3 and TPR-H2).All samples were active in CO, C3H8 and CH4 oxidation reaction at studied temperature range. Co-based samples showed significantly higher activity than Cu-based samples (Fig. 1) due to better reducibility. The next step in the research will be scale-up - active phase deposition on ceramic monolith and its testing in pilot plant as well as real full plant application (household stoves).

Název v anglickém jazyce

The use of transition mixed oxides catalysts for CO and hydrocarbons oxidation as an option to reduce emissions from small combustion devices

Popis výsledku anglicky

The results were presented at the 16th Pannonian International Symposium on Catalysis, which was held in Seggau (Styria, Austria), 1 - 5 September, 2024.The burning of wood, like the burning of other solid fuels, produces pollutants that have a negative impact on the environment and human health. In order to protect both, limits have been set for combustion plants to comply with. At present, manufacturers of small combustion plants (e.g. stoves) mainly use primary technologies to reduce emissions (change of combustion air intake, optimisation of the combustion chamber, inclusion of an afterburner, etc.), but it is expected that secondary technologies, e.g. addition of a catalyst in the flue gas path, will also be necessary [1].The aim of this work is to study transition metal mixed oxide (TMMO) based catalysts for the catalytic oxidation of CO, propane and methane as a typical waste gas pollutants from biomass combustion in domestic stoves. TMMOs represent an interesting alternative to currently used precious metals (mostly Au, Ag, Pd and Pt) based catalysts [1].Six Co and Cu based MMOs have been prepared by co-precipitation method from corresponding nitrates and tested in CO, C3H8 and CH4 oxidation reaction at temperature range of 100-500 oC. Reaction mixtures was composed of 10 vol.% of O2 and a) 100 ppm CH4 + 2500 ppm CO, b) 100 ppm C3H8 + 2500 ppm CO and c) 100 ppm CH4 + 100 ppm C3H8 + 2500 ppm CO, balanced with N2 were used. The catalytic experiments were performed in stainless steel reactor (din= 6 mm) and reaction products were analyzed on GC (Hewlett Packard, HP6890 series) with TCD and FID analyzer and ShinCarbon column. Tested samples were characterized by AAS, XRD, N2 physisorption and temperature programmed techniques (TPD-CO2, TPD-NH3 and TPR-H2).All samples were active in CO, C3H8 and CH4 oxidation reaction at studied temperature range. Co-based samples showed significantly higher activity than Cu-based samples (Fig. 1) due to better reducibility. The next step in the research will be scale-up - active phase deposition on ceramic monolith and its testing in pilot plant as well as real full plant application (household stoves).

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20400 - Chemical engineering

Projekt

<a href="/cs/project/TN02000025" target="_blank" >TN02000025: Národní centrum pro energetiku II</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů