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NO(x) abatement by trapping/catalyti...

Huang, Helen Yaping.

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NO(x) abatement by trapping/catalytic reduction and theoretical/experimental studies on new sorbents.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	NO(x) abatement by trapping/catalytic reduction and theoretical/experimental studies on new sorbents./
Author:	Huang, Helen Yaping.
Description:	228 p.
Notes:	Chair: Ralph T. Yang.
Contained By:	Dissertation Abstracts International63-02B.
Subject:	Engineering, Automotive. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3042088
ISBN:	0493556664

NO(x) abatement by trapping/catalytic reduction and theoretical/experimental studies on new sorbents.
Huang, Helen Yaping.

NO(x) abatement by trapping/catalytic reduction and theoretical/experimental studies on new sorbents. - 228 p.

Chair: Ralph T. Yang.

Thesis (Ph.D.)--University of Michigan, 2002.

Some other NO removal techniques are also investigated in this work, such as kinetic study of NH3-SCR on Fe-ZSM-5 and the study of catalyzed carbon-NO reactions.

ISBN: 0493556664Subjects--Topical Terms:

1018477
Engineering, Automotive.

NO(x) abatement by trapping/catalytic reduction and theoretical/experimental studies on new sorbents.
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020 $a 0493556664
035 $a (UnM)AAI3042088
035 $a AAI3042088
040 $a UnM $c UnM
100 1 $a Huang, Helen Yaping. $3 1258658
245 1 0 $a NO(x) abatement by trapping/catalytic reduction and theoretical/experimental studies on new sorbents.
300 $a 228 p.
500 $a Chair: Ralph T. Yang.
500 $a Source: Dissertation Abstracts International, Volume: 63-02, Section: B, page: 0904.
502 $a Thesis (Ph.D.)--University of Michigan, 2002.
520 $a Some other NO removal techniques are also investigated in this work, such as kinetic study of NH3-SCR on Fe-ZSM-5 and the study of catalyzed carbon-NO reactions.
520 $a <italic>NOx abatement by trapping</italic>/<italic>catalytic reduction </italic>. In order to improve fuel economy, it is desirable to operate engines under lean-burn conditions. NOx trapping/reduction is a promising approach for NOx removal under such conditions. Mechanistic studies show that the role of noble metals under lean-burn conditions is to increase the reaction rates of NO oxidation to NO2 and nitrite oxidation to nitrate. Nitrite and NO2 are intermediates and nitrate mainly comes from oxidation of nitrite.
520 $a Pt/BaO/Al2O3 is known to be effective for NO x removal through lean-rich cycles, but it deactivates in the presence of SO2 due to formation of stable barium sulfate. We investigate Fe-Mn based transition metal oxides as NOx sorbents. They are found to be efficient for NOx adsorption and are resistant to SO 2. We further study Pt-Rh/TiO2/Al2O3 as NOx trapping/reduction catalysts. They are highly active for NOx removal through lean-rich cycles. NOx conversion of 90% is obtained after 5 h lean-rich cyclic runs in the presence of 100 PPM SO2. These sorbents and catalysts are also characterized by BET surface area, pore size distribution, XRD, XPS, TPD and FT-IR spectroscopy.
520 $a <italic>Theoretical</italic>/<italic>experimental studies on new sorbents </italic>. Quantum chemical calculations are performed to study the gas-solid adsorption. The studies include (1) anion and cation effects on olefin adsorption on metal halides, (2) comparison of the π-complexations of ethylene and carbon monoxide with Cu<super>+</super> and Ag<super>+</super>, (3) anion effects on the adsorption of acetylene by nickel halides, and (4) ONIOM study of hydrogen adsorption on carbon nanotubes. Quantum chemical explanations of the sorbent-sorbate bonding are explained by molecular orbital theories.
520 $a Amine surface modified silica xerogel and MCM-48 are synthesized as selective sorbents for CO2 and H2S removal from natural gas mixtures. Very high adsorption capacities and adsorption rates are obtained for both gases. The sorbents can be regenerated completely by pressure swing or temperature swing. The presence of water vapor in the adsorption gas enhances CO 2 adsorption and barely affects the H2S adsorption.
590 $a School code: 0127.
650 4 $a Engineering, Automotive. $3 1018477
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Engineering, Environmental. $3 783782
690 $a 0540
690 $a 0542
690 $a 0775
710 2 0 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 63-02B.
790 $a 0127
790 1 0 $a Yang, Ralph T., $e advisor
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3042088