Performance of NO sub(x storage-reduction catalyst in the temperature-reductant concentration domain by response surface methodology)

Performance of NO sub(x storage-reduction catalyst in the temperature-reductant concentration domain by response surface methodology)

The performance trends of a homemade Pt-Ba/Al sub(2O) sub(3) monolith catalyst for NO sub(x storage and reduction at different temperatures and varying the hydrogen concentration fed during the regeneration period have been found by the response surface methodology. NO) sub(x) trapping efficiency du...

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Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2011-05, Vol.169 (1-3), p.58-67
Hauptverfasser: Pereda-Ayo, Benat, Duraiswami, Divakar, Gonzalez-Marcos, Jose A, Gonzalez-Velasco, Juan R
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Sprache:eng
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Catalysts
Computer networks
Hydrogen storage
Nitrous oxides
Response surface methodology
Routing (telecommunications)
Selectivity
Trapping
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container_issue 1-3
container_start_page 58
container_title Chemical engineering journal (Lausanne, Switzerland : 1996)
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creator Pereda-Ayo, Benat
Duraiswami, Divakar
Gonzalez-Marcos, Jose A
Gonzalez-Velasco, Juan R
description The performance trends of a homemade Pt-Ba/Al sub(2O) sub(3) monolith catalyst for NO sub(x storage and reduction at different temperatures and varying the hydrogen concentration fed during the regeneration period have been found by the response surface methodology. NO) sub(x) trapping efficiency during the lean period, selectivity to N sub(2/N) sub(2)O/NH sub(3 and global NSR efficiency have been used as the response for describing the performance of the monolith. Maximum NO) sub(x) trapping efficiency (80%) was found when operating at relative low temperature (240 [deg]C) and high reductant concentration (>2% H sub(2) but with limited selectivity to N) sub(2), whereas maximum selectivity to N sub(2 (above 90%) was achieved at high temperature (>300 [deg]C) and hydrogen in defect (
doi_str_mv 10.1016/j.cej.2011.02.052
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NO) sub(x) trapping efficiency during the lean period, selectivity to N sub(2/N) sub(2)O/NH sub(3 and global NSR efficiency have been used as the response for describing the performance of the monolith. Maximum NO) sub(x) trapping efficiency (80%) was found when operating at relative low temperature (240 [deg]C) and high reductant concentration (&gt;2% H sub(2) but with limited selectivity to N) sub(2), whereas maximum selectivity to N sub(2 (above 90%) was achieved at high temperature (&gt;300 [deg]C) and hydrogen in defect (&lt;1%) but with limited NO) sub(x) trapping efficiency. As both response should be as high as possible for NSR commercial systems, they are combined in the global NSR efficiency or production of N sub(2 related to NO in the feedstream (vol.%). Maximum NSR efficiency (65%) was achieved at 270 [deg]C and 1% H) sub(2), with NO sub(x trapping efficiency of 77% and N) sub(2) selectivity of 85%. It has been verified the consistency of data obtained with mechanistic aspects already reported in the literature. The role of ammonia as an intermediate that reacts with NO sub(x stored has been confirmed and also the primary routes of H) sub(2) which reacts with stored NO sub(x and the sequential route of stored NO) sub(x) reacting with H sub(2 and then NH) sub(3) reducing with stored NO sub(x downstream. 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subjects Catalysts
Computer networks
Hydrogen storage
Nitrous oxides
Response surface methodology
Routing (telecommunications)
Selectivity
Trapping
title Performance of NO sub(x storage-reduction catalyst in the temperature-reductant concentration domain by response surface methodology)
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