Analysis of NOx Conversion using a Quasi 2-D NH3-SCR Model with Detailed Reactions
We have constructed a quasi-2 dimensionalNH3 -SCR model with detailed surface reactions to analyze theNOxconversion mechanism and reasons for its inhibition at low temperatures. The model consists of seven detailed surface reactions proposed by Grozzale et al., and calculates longitudinal gas flow,...
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| Veröffentlicht in: | SAE International journal of fuels and lubricants 2012-01, Vol.5 (1), p.352-358 |
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| container_title | SAE International journal of fuels and lubricants |
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| creator | Kusaka, Jin Shimao, Hiroyuki Yano, Hiroki Murasaki, Takanori Koide, Naotaka Kawauchi, Hiroyasu Kato, Yoshifumi |
| description | We have constructed a quasi-2 dimensionalNH3
-SCR model with detailed surface reactions to analyze theNOxconversion mechanism and reasons for its inhibition at low temperatures. The model consists of seven detailed surface reactions proposed by Grozzale et al., and calculates longitudinal gas flow, gas phasecatalyst phase mass transfer, and mass diffusion within the catalyst phase in the depth dimension. Using the model, we have analyzed the results of pulsed ammonia (NH3
) feed tests at various catalyst temperatures, and results show that ammonium nitrate (NH4NO3
) is the inhibitor inNH3
-SCR reactions at low temperatures. In addition, we found that cutting the supply ofNH3
causes decomposition ofNH4NO3
, providing surface ammonia (NH4
+
), which rapidly reacts with adjacent NOx, leading to an instantaneous rise in nitrogen (N2) formation. However, the decomposition rate ofNH4NO3
depends on the catalyst temperature, hence an optimum addition of reductants, depending on theNH4NO3
formation/decomposition rate (and thus catalyst temperature) is required to maximize theNOxconversion efficiency of SCR catalysts. |
| doi_str_mv | 10.4271/2011-01-2081 |
| format | Article |
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-SCR model with detailed surface reactions to analyze theNOxconversion mechanism and reasons for its inhibition at low temperatures. The model consists of seven detailed surface reactions proposed by Grozzale et al., and calculates longitudinal gas flow, gas phasecatalyst phase mass transfer, and mass diffusion within the catalyst phase in the depth dimension. Using the model, we have analyzed the results of pulsed ammonia (NH3
) feed tests at various catalyst temperatures, and results show that ammonium nitrate (NH4NO3
) is the inhibitor inNH3
-SCR reactions at low temperatures. In addition, we found that cutting the supply ofNH3
causes decomposition ofNH4NO3
, providing surface ammonia (NH4
+
), which rapidly reacts with adjacent NOx, leading to an instantaneous rise in nitrogen (N2) formation. However, the decomposition rate ofNH4NO3
depends on the catalyst temperature, hence an optimum addition of reductants, depending on theNH4NO3
formation/decomposition rate (and thus catalyst temperature) is required to maximize theNOxconversion efficiency of SCR catalysts.</description><identifier>ISSN: 1946-3952</identifier><identifier>EISSN: 1946-3960</identifier><identifier>DOI: 10.4271/2011-01-2081</identifier><language>eng</language><publisher>SAE International</publisher><subject>Average linear density ; Catalysts ; Gas temperature ; Inlet temperature ; Low temperature ; Modeling ; Surface reactions ; Temperature ; Toy models ; Two dimensional modeling</subject><ispartof>SAE International journal of fuels and lubricants, 2012-01, Vol.5 (1), p.352-358</ispartof><rights>Copyright © 2011 Society of Automotive Engineers of Japan, Inc. and Copyright © 2011 SAE International</rights><rights>Copyright 2011 Society of Automotive Engineers of Japan, Inc. and SAE International</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/26272891$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/26272891$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,27915,27916,58008,58241</link.rule.ids></links><search><creatorcontrib>Kusaka, Jin</creatorcontrib><creatorcontrib>Shimao, Hiroyuki</creatorcontrib><creatorcontrib>Yano, Hiroki</creatorcontrib><creatorcontrib>Murasaki, Takanori</creatorcontrib><creatorcontrib>Koide, Naotaka</creatorcontrib><creatorcontrib>Kawauchi, Hiroyasu</creatorcontrib><creatorcontrib>Kato, Yoshifumi</creatorcontrib><title>Analysis of NOx Conversion using a Quasi 2-D NH3-SCR Model with Detailed Reactions</title><title>SAE International journal of fuels and lubricants</title><description>We have constructed a quasi-2 dimensionalNH3
-SCR model with detailed surface reactions to analyze theNOxconversion mechanism and reasons for its inhibition at low temperatures. The model consists of seven detailed surface reactions proposed by Grozzale et al., and calculates longitudinal gas flow, gas phasecatalyst phase mass transfer, and mass diffusion within the catalyst phase in the depth dimension. Using the model, we have analyzed the results of pulsed ammonia (NH3
) feed tests at various catalyst temperatures, and results show that ammonium nitrate (NH4NO3
) is the inhibitor inNH3
-SCR reactions at low temperatures. In addition, we found that cutting the supply ofNH3
causes decomposition ofNH4NO3
, providing surface ammonia (NH4
+
), which rapidly reacts with adjacent NOx, leading to an instantaneous rise in nitrogen (N2) formation. However, the decomposition rate ofNH4NO3
depends on the catalyst temperature, hence an optimum addition of reductants, depending on theNH4NO3
formation/decomposition rate (and thus catalyst temperature) is required to maximize theNOxconversion efficiency of SCR catalysts.</description><subject>Average linear density</subject><subject>Catalysts</subject><subject>Gas temperature</subject><subject>Inlet temperature</subject><subject>Low temperature</subject><subject>Modeling</subject><subject>Surface reactions</subject><subject>Temperature</subject><subject>Toy models</subject><subject>Two dimensional modeling</subject><issn>1946-3952</issn><issn>1946-3960</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNo9UMFOwzAUixBIjMGNK1J-IJCXZEl6nDrYkMYmCpyrN_oKqUqLmg7Y39NpiJN9sC3bjF2CvDbKwY2SAEKCUNLDERtBYqzQiZXH_3yiTtlZjJWU1kkNI5ZNG6x3MUTelny1_uFp23xRF0Pb8G0MzRtH_rjFGLgSM75aaPGUZvyhLajm36F_5zPqMdRU8IzwtR9s8ZydlFhHuvjDMXu5u31OF2K5nt-n06WowLlegAaURvpCO5UYVwCQ9ZsNUGJAI5lJKQlhmOWN04hOWUsbZXXpfTkBKvSYiUNuRMpD01PX4L4A1lW7HXgd8_0huYR8f8igvzroq9i3Xf7ZhQ_sdrmyyimfgP4FUX1bHw</recordid><startdate>20120101</startdate><enddate>20120101</enddate><creator>Kusaka, Jin</creator><creator>Shimao, Hiroyuki</creator><creator>Yano, Hiroki</creator><creator>Murasaki, Takanori</creator><creator>Koide, Naotaka</creator><creator>Kawauchi, Hiroyasu</creator><creator>Kato, Yoshifumi</creator><general>SAE International</general><scope/></search><sort><creationdate>20120101</creationdate><title>Analysis of NOx Conversion using a Quasi 2-D NH3-SCR Model with Detailed Reactions</title><author>Kusaka, Jin ; Shimao, Hiroyuki ; Yano, Hiroki ; Murasaki, Takanori ; Koide, Naotaka ; Kawauchi, Hiroyasu ; Kato, Yoshifumi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j177t-131a0408d372947d11e68bb1e9413ae45f0ea12718473aa7266eb263f88f51ed3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Average linear density</topic><topic>Catalysts</topic><topic>Gas temperature</topic><topic>Inlet temperature</topic><topic>Low temperature</topic><topic>Modeling</topic><topic>Surface reactions</topic><topic>Temperature</topic><topic>Toy models</topic><topic>Two dimensional modeling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kusaka, Jin</creatorcontrib><creatorcontrib>Shimao, Hiroyuki</creatorcontrib><creatorcontrib>Yano, Hiroki</creatorcontrib><creatorcontrib>Murasaki, Takanori</creatorcontrib><creatorcontrib>Koide, Naotaka</creatorcontrib><creatorcontrib>Kawauchi, Hiroyasu</creatorcontrib><creatorcontrib>Kato, Yoshifumi</creatorcontrib><jtitle>SAE International journal of fuels and lubricants</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kusaka, Jin</au><au>Shimao, Hiroyuki</au><au>Yano, Hiroki</au><au>Murasaki, Takanori</au><au>Koide, Naotaka</au><au>Kawauchi, Hiroyasu</au><au>Kato, Yoshifumi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Analysis of NOx Conversion using a Quasi 2-D NH3-SCR Model with Detailed Reactions</atitle><jtitle>SAE International journal of fuels and lubricants</jtitle><date>2012-01-01</date><risdate>2012</risdate><volume>5</volume><issue>1</issue><spage>352</spage><epage>358</epage><pages>352-358</pages><issn>1946-3952</issn><eissn>1946-3960</eissn><abstract>We have constructed a quasi-2 dimensionalNH3
-SCR model with detailed surface reactions to analyze theNOxconversion mechanism and reasons for its inhibition at low temperatures. The model consists of seven detailed surface reactions proposed by Grozzale et al., and calculates longitudinal gas flow, gas phasecatalyst phase mass transfer, and mass diffusion within the catalyst phase in the depth dimension. Using the model, we have analyzed the results of pulsed ammonia (NH3
) feed tests at various catalyst temperatures, and results show that ammonium nitrate (NH4NO3
) is the inhibitor inNH3
-SCR reactions at low temperatures. In addition, we found that cutting the supply ofNH3
causes decomposition ofNH4NO3
, providing surface ammonia (NH4
+
), which rapidly reacts with adjacent NOx, leading to an instantaneous rise in nitrogen (N2) formation. However, the decomposition rate ofNH4NO3
depends on the catalyst temperature, hence an optimum addition of reductants, depending on theNH4NO3
formation/decomposition rate (and thus catalyst temperature) is required to maximize theNOxconversion efficiency of SCR catalysts.</abstract><pub>SAE International</pub><doi>10.4271/2011-01-2081</doi><tpages>7</tpages></addata></record> |
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| issn | 1946-3952 1946-3960 |
| language | eng |
| recordid | cdi_sae_internationaljournals_2011_01_2081 |
| source | Jstor Complete Legacy |
| subjects | Average linear density Catalysts Gas temperature Inlet temperature Low temperature Modeling Surface reactions Temperature Toy models Two dimensional modeling |
| title | Analysis of NOx Conversion using a Quasi 2-D NH3-SCR Model with Detailed Reactions |
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