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Volume 08
Research & Reviews: Journal of Engineering and Technology
ISSN: 2319-9873
Automobile Europe 2019
July 08-09, 2019
6
th
International Conference and Exhibition on
July 08-09, 2019 | Zurich, Switzerland
Automobile & Mechanical Engineering
Comparison of hydrocaron components affecting de-nox performance of hc-selective catalytic reduction
catalysts
Kyungseok Lee
1
, Hidenori Kosaka
1
, Susumu Sato
1
, Toshiyuki yokoi
1
and
Byungchul Choi
2
1
Tokyo Institue of Technology, Japan
2
Chonnam National University, South Korea
T
he catalytic performance of copper (Cu)-containing zeolite catalysts supported on various types of zeolites
(chabaziete, MFI, and BEA frameworks) was investigated in the hydrocarbon (HC)-selective catalytic reduction
(SCR) of NOx with C
3
H
6
and n-C
4
H
10
as reducing agents. The catalysts were prepared by an wetness incipient
impregantion method with varying copper loadings from 1 to 10 wt%, thereafter they were washcoated on the
commericial monolitic honeycomb substrate. All the prepared powder catalytst were characterized by N
2
adsorption
isotherms, powder X-ray diffraction (XRD), inductively coupled plasma–atomic emission spectrometry, solid-
state
27
Al magic angle spinning–nuclear magnetic resonance, ultraviolet–visible spectroscopy, X-ray photoelectron
spectroscopy, field emission scanning electron microscopy, and high-resolution scanning electron microscopy. The
impregnation of Cu to the respective zeolites did not modify the inherent zeolite topology, whereas the loading levels
of copper and zeolite topology significantly affected the de-NOx performance of Cu/zeolites. Among the Cu/zeolite
catalysts, 2Cu/ZSM-5 showed the best catalytic performance both the C3H6- and C
4
H
10
-SCR, exhibiting a nearly
70% de-NOx performance at 360
0
C in C
3
H
6
-SCR and 74% NOx conversion at 450-465
0
C in C
4
H
10
-SCR, followed
by Cu/BETA and Cu/SSZ-13. The effects of coexistent gases (0-8 vol.% oxygen and 0-10 vol.% carbon dioxide) and
hydrothermal aging at 700
0
C were also evaluated. Oxygen was an indispensable component for the HC-SCR process,
and its concentration affected the N
2
selectivity and temperature window of the maximum de-NOx performance.
The presence of CO
2
in the feed stream was an inhibitor for NOx reduction.
lee.k.aj@m.titech.ac.jpJET 2019, Volume 08