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Reduction of NOx with NH3 in presence of pyrolysed macro-cycle catalyst
KTH, School of Chemical Science and Engineering (CHE).
KTH, School of Chemical Science and Engineering (CHE).
KTH, School of Chemical Science and Engineering (CHE).
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1991 (English)Report (Other academic)
Abstract [en]

Reduction of NOx with NH3 in the presence of pyrolyzed cobalt-tetraphenylporphyrin, CoTPP 'macro-cycle black', was studied. Active carbon, Norit RBXS 1, was used as a carrier. The experimental conditions were varied as follows: temperature from 95 to 140°C, space velocity of the gas mixture 1000-5000 h-1 and catalyst content 0-1%. The results showed that, in the experimental range studied, the temperature has no significant effect on the conversion of NOx. The conversion of NOx at low space velocity of the gas (1000 h-1) was high (approx. 90%), both in the presence and absence of CoTPP black. This was explained by the fact that the active carbon used as a catalyst support also has a catalytic effect on the reduction of NOx. At low space velocity this effect is sufficient to achieve high conversion of NOx in the presence of active carbon only. The conversion decreased at higher space velocity, however. The presence of CoTPP black counteracted the negative effect of the increased space velocity. The effect of the 'macro-cycle black' on the conversion of NOx was significant at higher space velocitites.

Place, publisher, year, edition, pages
Finnish Acad of Technology , 1991. , 14 p.
Keyword [en]
Ammonia--Applications, Carbon--Activated, Catalysts--Activity, Catalysts--Organometallics, Organometallics--Pyrolysis, Active Carbon Catalyst Supports, Catalytic Nitrogen Oxide Reduction, Nitrogen Oxide Conversion Efficiency, Pyrolyzed Macrocycle Catalysts, Supported Organocobalt Catalysts, Nitrogen Oxides
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-62364OAI: oai:DiVA.org:kth-62364DiVA: diva2:480201
Note

Correspondence Address: Bjornbom, E.; Inst of Technology, Stockholm, Sweden

NR 20140805Available from: 2012-01-19 Created: 2012-01-19 Last updated: 2013-05-02Bibliographically approved

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