Abstract
Destructive sorption of NF 3 as a novel greenhouse gas on the metal oxides sorbents is an effective way for its destruction. The key issue is to develop an active sorbent for NF 3 destruction. Here, AlOOH supported on carbon sphere (CS@AlOOH) was synthesized hydrothermally and calcined to produce Al 2 O 3 . Subsequently, the Al 2 O 3 was coated hydrothermally by MnO x at various temperatures and heat-treated to prepare the Al 2 O 3 @Mn 2 O 3 sorbents with core@shell structure for NF 3 sorption. The results show that the higher surface area/pore volume and the promotional effect of surface Mn 2 O 3 on the fluorination of Al 2 O 3 substrate led to higher reactivity of Al 2 O 3 @Mn 2 O 3 sorbents than bare Al 2 O 3 in NF 3 destruction. For Al 2 O 3 @Mn 2 O 3 sorbents, the coating temperatures of MnO x onto Al 2 O 3 had a significant effect on their reactivity, and the one synthesized hydrothermally at 160 °C was even more active than the Al-Mn complex oxide sorbent reported previously. This work provides a good idea for the design of effective sorbents for NF 3 destruction.
Published Version
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