期刊
CHEMICAL ENGINEERING JOURNAL
卷 252, 期 -, 页码 47-54出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.04.095
关键词
HC-SCR; Alternative fuels; Hydrogen; NOx conversion
资金
- industry collaboration project CO2 Reduction through Emissions Optimisation (CREO) [400176/149]
- Engineering and Physical Science Research Council [G038139]
- Advantage West Midlands and the European Regional Development Fund
- Science City Research Alliance Energy Efficiency project
- Engineering and Physical Sciences Research Council [EP/G038139/1] Funding Source: researchfish
- EPSRC [EP/G038139/1] Funding Source: UKRI
The hydrocarbon-selective catalytic reduction (HC-SCR) activity of an Ag/Al2O3 catalyst was investigated. The function on catalytic NOx reduction of different fuel properties using alternative reactants such as gas-to-liquid (GTL) and butanol was studied. This work proves that such improvements are due to the high reactivity, polarity and diffusivity of butanol within the catalyst enhancing NOx conversion. Furthermore, it is suggested that HC components such butanol share some of the reaction mechanisms to hydrogen as a promoter in addition to his role as a reductant leading to improve NOx reduction. Therefore, it is proposed the simultaneous dual role of butanol as a reactant and as promoter. Catalyst performance at low temperature was further improved with the addition of hydrogen (H-2). However, this performance was found to degrade as temperature increases, due to H-2 reactant selectivity changing, directly being oxidised. Increased NOx conversion was dependent on HC:NOx ratio, showing at low temperature a low HC:NOx ratio is required. As temperature increases, so does the required HC:NOx ratio to compensate for hydrocarbons partial and complete oxidation. These results demonstrate a method of gaining significant NOx reduction through the combination of environmental catalysts and alternative reactants. (C) 2014 Elsevier B.V. All rights reserved.
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