{
  "date" : "2004-07-30",
  "identifier_doecontract" : "",
  "subject" : "54 ENVIRONMENTAL SCIENCES; MANGANESE OXIDES; CERIUM OXIDES; COPRECIPITATION; SELECTIVE CATALYTIC REDUCTION; NITRIC OXIDE; AMMONIA; CATALYSTS; NITROUS OXIDE",
  "description" : "A series of manganese-cerium oxide catalysts were prepared by co-precipitation method and used for low temperature selective catalytic reduction (SCR) of NO{sub x} with ammonia in the presence of excess O{sub 2}. These catalysts were characterized by X-ray diffraction (XRD), surface area measurement and FTIR. The experimental results showed that the best Mn-Ce mixed-oxide catalyst yielded 95% NO conversion at 150C at a space velocity of 42,000h{sup -1}. As the manganese content was increased from 0 to 40% (i.e. the molar ratio of Mn/(Mn+Ce)), NO conversion increased significantly, but decreased at higher manganese contents. The most active catalyst was obtained with a molar Mn/(Mn+Ce) ratio of 0.4. Only N{sub 2} rather than N{sub 2}O was found in the product when the temperature was below 150C. At higher temperatures, trace amounts of N{sub 2}O were detected. A mechanistic pathway for this reaction was proposed based on earlier findings and FTIR results obtained in this work. The initial step was the adsorption of NH{sub 3} on Lewis acid sites of catalyst, followed by reaction with nitrite species to produce N{sub 2} and H{sub 2}O. Possible intermediates are proposed and all the intermediates could transform into NH{sub 2}NO, which could further react to produce N{sub 2} and H{sub 2}O.",
  "language" : "English",
  "identifier_report" : "",
  "publisher_sponsor" : "",
  "publisher_country" : "Netherlands",
  "source" : "ECN",
  "purl" : "",
  "title" : "MnO{sub x}-CeO{sub 2} mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with NH{sub 3} at low temperatures",
  "type" : "Journal Article",
  "subject_related" : "",
  "relation" : "Journal Name: Applied Catalysis. B, Environmental; Journal Volume: 51; Journal Issue: 2; Other Information: PBD: 30 Jul 2004",
  "entry_date" : "2010-12-31",
  "subject_list" : [ "54 ENVIRONMENTAL SCIENCES", "MANGANESE OXIDES", "CERIUM OXIDES", "COPRECIPITATION", "SELECTIVE CATALYTIC REDUCTION", "NITRIC OXIDE", "AMMONIA", "CATALYSTS", "NITROUS OXIDE" ],
  "publisher_availability" : "",
  "rights" : "",
  "announced_date" : "2004-09-23",
  "type_qualifier" : "",
  "has_fulltext" : false,
  "coverage" : "",
  "identifier" : "",
  "journal_volume" : "51",
  "creator" : "Qi, Gongshin; Yang, Ralph T [Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109-2136 (United States)]; Chang, Ramsay [Air Pollution Control, Power Generation, Electric Power Research Institute, Palo Alto, CA 94304-1395 (United States)]",
  "site_ownership_code" : "ECN",
  "osti_id" : "20502446",
  "journal_issue" : "2",
  "resource_type" : "JOUR",
  "format" : "Medium: X; Size: page(s) 93-106",
  "journal_name" : [ ],
  "contributing_organizations" : "",
  "citation_location" : "https://www.osti.gov/etdeweb/biblio/20502446",
  "publication_year" : 2004,
  "subject_list_commas" : "54 ENVIRONMENTAL SCIENCES, MANGANESE OXIDES, CERIUM OXIDES, COPRECIPITATION, SELECTIVE CATALYTIC REDUCTION, NITRIC OXIDE, AMMONIA, CATALYSTS, NITROUS OXIDE",
  "publisher" : "",
  "identifier_other" : "Journal ID: ISSN 0926-3373; ACBEE3; TRN: NL04E1467",
  "publisher_research" : "",
  "creators_list" : [ "Qi, Gongshin", "Yang, Ralph T [Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109-2136 (United States)]", "Chang, Ramsay [Air Pollution Control, Power Generation, Electric Power Research Institute, Palo Alto, CA 94304-1395 (United States)]" ],
  "doi" : "https://doi.org/10.1016/j.apcatb.2004.01.023"
}