Belgium Herbarium image of Meise Botanic Garden

Mcclymont, David

Kolaczkowski, Stan

Molloy, Kieran C

Awdry, Serpil

Meise Botanic Garden

ZENODO

Luzula campestris (L.) DC. (BR0000011381167)

Luzula campestris (L.) DC. (BR0000011382850)

Luzula campestris (L.) DC. (BR0000011383390)

Luzula campestris (L.) DC. (BR0000011381587)

Luzula campestris (L.) DC. (BR0000011382607)

Luzula campestris (L.) DC. (BR0000011381945)

Luzula campestris (L.) DC. (BR0000011382515)

OPUS

        Citation for published version:Mcclymont, D, Kolaczkowski, S, Molloy, KC & Awdry, S 2013, 'Novel catalyst systems for deNOx' DTCSymposium Series - Sustainable Industrial Catalysis, Bath, UK United Kingdom, 29/01/13, .Publication date:2013Document VersionPeer reviewed versionLink to publicationUniversity of BathGeneral rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediatelyand investigate your claim.Download date: 13. May. 2019H2-SCR H2-NSRPt/Al2O3 Pt/Ba/Al2O3Ag/Al2O3 Pt/K/Al2O3Ag/Ba/Al2O3Ag/K/Al2O3Table 1. Summary of prepared H2-deNOxcatalysts and associated processesCatalysts prepared usingimpregnation techniques(Table 1)Supported on honeycombmonoliths (Figure 3)Channel size = 1 mm x 1 mm (~80 channels per monolith)Novel catalyst systems for deNOxNitric oxides are highly reactive gases; primarily NO (>90 %) and NO2,involved in many pollutant processes e.g. the formation of acid rainThey are produced as a result of high temperatures during thecombustion of fuels, and legislation is in place to control emissions i.e.the Industrial Emissions Directive (IED) regulates activities that involveburning or gasification of waste (Figure 1)Technologies have been developed which react a reductant with NOxemissions, forming harmless N2 and H2O. Development of a materialand process to treat NOx emissions using H2 is the aim of this projectDavid W. J. McClymont,a,b Stan T. Kolaczkowski,b Kieran C. Molloy,c Serpil AwdrybaCentre for Sustainable Chemical Technologies, University of Bath, BA2 7AY, UK.bDepartment of Chemical Engineering, University of Bath, BA2 7AY, UK.cDepartment of Chemistry, University of Bath, BA2 7AY, UK.E-mail: D.W.J.McClymont@bath.ac.uk URL: http://www.bath.ac.uk/csctMeasurements made on an operational gasification plant (Figure 2), identified the gaseousfuel produced as having a 10-17 % H2 content depending on the conditions in the gasifierUtilising H2 already present in the system (Figure 1) could provide a reductant which does nothave to be specially manufactured (e.g. NH3, urea), and hence would be a cleaner approachH2 can also be used in NOx storage and reduction (NSR) processes where NOx species are‘trapped’ and subsequently reduced through alternate lean and rich-burn cycles (Figure 4)2. H2 for deNOx1. What is NOx?3. CatalystsFigure 3. Pt/Ba/Al2O3monolithsFigure 1. Schematic of  proposed biogas engine exhaust treatment system10 – 17 % H2Initial results (Figure 4) suggest that catalysts demonstrate some deNOx activity and there issome competition between desired NOx storage and the formation of NO2Further work will investigate the performance of the prepared catalysts in their relevantprocesses (SCR/NSR) and identify optimum conditions/limitations. The catalysts will becharacterized through temperature-programmed studies (TPD and TPSR)5. Initial Conclusions and Future workFigure 2. Refgas gasification plant, Chester, UKFigure 5. Experimental set-upRotametersReactor housed within electric furnaceSolenoid valveFurnace controllerFigure 4. Example of data obtained from H2-NSR over Pt/Ba/Al2O3catalyst. Reaction conditions: Lean Phase - 500 ppm NO, 3 % O2, balance N2. Rich Phase - 2000 ppm H2, balance N2.4. Experimental Results14 mm10 mm00.511.522.533.5405001000150020002500Abundance (%)Abundance (ppm)TimeNONO InletH2 InletH2O O2H2O2 Inlet350 ᵒCNO NO2N2O NH3H2O2N2ONO2NH3H2OLEAN PHASERICH PHASE