Published July 2019 | Version v1
Journal article Metadata-only

The promotional effect of H2 reduction treatment on the low-temperature NH3-SCR activity of Cu/SAPO-18

Creators

  • 1. University of Chinese Academy of Sciences, Beijing 100049 (China)
  • 2. Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021 (China)
  • 3. Ningbo Urban Environment Observation and Research Station-NUEORS, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800 (China)
  • 4. State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 (China)

Description

In this study, a Cu/SAPO-18 catalyst was treated by H2 reduction, which induced a remarkable enhancement of the low-temperature NH3-SCR activity. Compared with the fresh catalyst, the reduced Cu/SAPO-18 catalyst showed an increase in NOx conversion from 45% to 80% at 175 °C, and from 80% to 100% at 200 °C, under a GHSV of 200,000 h−1. The characterization (XRD, XPS and H2-TPR) and in-situ DRIFTS results confirmed that a large amount of Cu cations (most of which were Cu+ ions) existed on/in Cu/SAPO-18 after the H2 reduction treatment. The increased Cu+/Cu2+ ratio led to the enhanced low-temperature SCR activity.

Additional details

Identifiers

DOI
10.1016/j.apsusc.2019.03.336;
PII
S0169433219309754;

Publishing Information

Journal Title
Applied Surface Science
Journal Volume
483
Journal Page Range
p. 536-544
ISSN
0169-4332
CODEN
ASUSEE

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
55055373
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
AMMONIA; CATALYSTS; CATIONS; COPPER IONS; HYDROGEN; NITROGEN OXIDES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY
Descriptors DEC
CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; DIFFRACTION; ELECTRON SPECTROSCOPY; ELEMENTS; HYDRIDES; HYDROGEN COMPOUNDS; IONS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHOTOELECTRON SPECTROSCOPY; SCATTERING; SPECTROSCOPY

Optional Information

Copyright
Copyright (c) 2019 Published by Elsevier B.V.