Supplementary information
Manganese-rich MnSAPO-34 molecular sieves as an efficient catalyst for the selective catalytic reduction of NOx with NH3: One-pot synthesis, catalytic performance and characterization
Chenglong Yua, Feng Chena, Lifu Donga, Xiaoqing Liua, Bichun Huang a,b*, Xinnan Wanga, Shengbang Zhonga
a School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China
b Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China
* Corresponding author: Bichun Huang
Postal address:
School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
Email:
Tel./ Fax.: +86 20 39380519
Stability test of the MnSAPO-34 catalyst
Fig. S1. Stability test of the MnSAPO-34 catalyst (S10)
Reaction conditions: 800 ppm NO, 800 ppm NH3, 5 vol.% O2, Ar to balance,
GHSV = 40,000 h-1, 220 °C.
NH3-SCR stability test of the MnSAPO-34 catalyst (S10 sample) was carried out. As shown in Fig S1, a stability test of more than 70 h shows that the MnSAPO-34 catalyst is highly active and stable.
N2 selectivity test of the MnSAPO-34 catalyst
Fig. S2. N2 selectivity test of the MnSAPO-34 catalyst (S6-S10)
Reaction conditions: 800 ppm NO, 800 ppm NH3, 5 vol.% O2, Ar to balance, GHSV = 40,000 h-1
The N2 selectivity of the MnSAPO-34 catalyst (S6-S10 samples) is shown in Fig. S2. The results indicate that the MnSAPO-34 catalyst (S10 sample) show excellent N2 selectivity and more than 93% N2 selectivity are attained within the tested temperature range. All the tested samples show high N2 selectivity. However, the N2 selectivity of S6-S9 samples is relatively slightly lower than that of the S10 sample. Besides, N2 selectivity of S6-S10 samples is decreased slightly at high temperature due to the formation of N2O.
3