ORIGINAL RESEARCH
N2O Abatement over Ruthenium Supported
on Highly Dispersed Hydrotalcite-Like
Composite Metal Oxides
| 1 | School of Resources and Environmental Engineering, East China University of Science and Technology,
Shanghai, China |
CORRESPONDING AUTHOR
Yaoyu Feng
East China University of Science and Technology, Shanghai 200237, China, Bibo Road 942, No. 5-1103, Zhangjiang Hi-Tech park, Pudong, 201203 Shanghai, China
East China University of Science and Technology, Shanghai 200237, China, Bibo Road 942, No. 5-1103, Zhangjiang Hi-Tech park, Pudong, 201203 Shanghai, China
Submission date: 2018-06-07
Final revision date: 2018-09-03
Acceptance date: 2018-09-08
Online publication date: 2019-07-23
Publication date: 2019-09-17
Pol. J. Environ. Stud. 2019;28(6):4477–4484
KEYWORDS
N2O abatementcomposite metal oxideshydrotalcite-like structurecoprecipitationprogrammed impregnation
TOPICS
ABSTRACT
Highly dispersive hydrotalcite-like composite metal oxides were prepared by coprecipitation method.
CO2-TPD characterization showed that the adsorption capacity over the samples at low (<300ºC) and
middle (300~550ºC) temperatures was improved by using La or Cu to modify the sample of MgAlO,
while slightly reduced at high temperature (>550ºC). The experimental results showed that the composite
metal oxide, MexOy (Me=La, Mg, Al), had relatively good performance on N2O decomposition. A series
of Ru/MexOy catalysts were prepared by programed impregnation method. CO2-TPD analysis indicated
that the samples of Ru/MexOy not only increased the total CO2 adsorption capacity, but also obviously
enhanced CO2 adsorption capacity at 300~550ºC compared with MexOy. TEM characterization showed
that the Ru component was uniformly loaded on the support surface under nanoscale. N2O catalytic
decomposition showed that the suitable Ru loading on support was 2.0(wt.)%, i.e., Ru(2.0)/MexOy. Under
conditions of (v/v) 10% N2O+82% N2+5.0% O2+3.0% H2O, 30000h-1 of space velocity, 510ºC, the stability
test showed that N2O conversion remained ca. 95.0%, indicating that Ru(2.0)/MexOy had good stability
and activity at relatively low temperature.
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