%0 Journal Article
%A Li, Weiman
%A Liu, Haidi
%A Chen, Yunfa
%D 2020
%T Fabrication of MnOx–CeO2‑Based Catalytic Filters and Their Application in Low-Temperature
Selective Catalytic Reduction of NO with NH3
%U https://acs.figshare.com/articles/journal_contribution/Fabrication_of_MnO_i_sub_x_sub_i_CeO_sub_2_sub_Based_Catalytic_Filters_and_Their_Application_in_Low-Temperature_Selective_Catalytic_Reduction_of_NO_with_NH_sub_3_sub_/12592325
%R 10.1021/acs.iecr.0c00131.s001
%2 https://acs.figshare.com/ndownloader/files/23567876
%K dust removal ability
%K ratio
%K NH 3 Catalytic filters
%K SCR
%K Mn
%K pressure drop increase
%K NH 3
%K temperature range
%K CF
%K mullite filters
%K conversion
%K surface oxygen species
%K loading weight
%X Catalytic filters (CFs) were fabricated
by coating manganese and
ceria oxides on mullite filters with a high porosity and a relatively
low pressure drop and were used in the selective catalytic reduction
of NOx by NH3 (NH3-SCR). The influences of Mn/Ce ratios and loading weights were investigated.
The CF with a Mn/Ce molar ratio of 6/4 can achieve >90% NO conversion
in the temperature range of 120–250 °C, owing to abundant
surface oxygen species, Ce3+, and Mn4+ on it.
NO conversion in the temperature range of 120–250 °C increased
when the loading weight increased from 1.05 to 4.18%; however, when
the loading weight was further increased, the catalytic activity remained
unchanged. A possible growth mechanism of catalyst particles on mullite
filters was proposed: the active species tended to disperse finely
when the loading weight was lower than ∼4.00%; however, when
the loading weight was more than 4.00%, the particles tended to grow
at the conjunction of fibers, leading to a considerable pressure drop
increase. The CFs showed a dust removal ability of more than 99% in
a pilot experiment, which may provide a chance for the coprocessing
of dust and NOx in practical use.
%I ACS Publications