Investigation into the impact of CeO morphology regulation on the oxidation process of dichloromethane.

Four distinct CeO catalysts featuring varied morphologies (nanorods, nanocubes, nanoparticles, and nano spindle-shaped) were synthesized through a hydrothermal process and subsequently employed in the oxidation of dichloromethane (DCM). The findings revealed that the nano spindle-shaped CeO exhibited exposure of crystal faces (111), demonstrating superior catalytic oxidation performance for DCM with a of 337 °C and notably excellent low-temperature catalytic activity ( = 192 °C). The primary reaction products were identified as HCl and CO.

Insights into the superior resistance of In-CoO-GaO/H-Beta to SO and HO in the selective catalytic reduction of NO by CH.

The existence of sulfur dioxide and water vapor in the flue gas generated from waste-to-energy stations could lead to catalyst deactivation, which has adverse effects on NO removal. It is thus particularly important to study the reaction mechanism of catalyst resistance to poisoning. Herein, we report the mechanism of In-CoO-GaO/H-Beta catalyst to SO and HO resistance in the selective catalytic reduction (SCR) of NO by CH.

Amino-acid modulated hierarchical In/H-Beta zeolites for selective catalytic reduction of NO with CH in the presence of HO and SO.

Selective catalytic reduction of NO with CH (CH-SCR) has been studied over a series of amino-acid mediated hierarchical beta zeolites with indium exchange. Amino acid mesoporogens greatly affect the NO reduction (DeNO) efficiency of In/H-Beta catalysts. Mesoporous In/H-Beta-P synthesized using proline exhibits the highest NO removal efficiency of 40% in excess oxygen and poisonous SO and HO, 10% higher than our previously optimized In/H-Beta catalyst using commercial beta zeolites with a similar Si/Al ratio.

Effect of preparation and reaction conditions on the performance of In/H-Beta for selective catalytic reduction of NO with CH.

In/H-Beta catalyst was prepared by optimizing the support, concentration of ion exchange liquid and calcination temperature to investigate the effects of synthesis conditions on catalytic activity of selective catalytic reduction of NO with CH. The results showed that the In/H-Beta catalyst exhibited the superior activity when concentration of exchange liquid was 0.033 M and calcination temperature was 500 °C, the NO removal ratio could reach 97.