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Synthesis and Catalytic Activity Studies of V/K/Ca and V/Ks/Ce Based Catalysts for Diesel Soot Oxidation

机译:V / K / Ca和V / Ks / Ce基柴油烟灰氧化催化剂的合成及催化活性研究

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摘要

The catalysts based on V/K/Ca and V/Ks/Ce systems for diesel soot catalytic oxidation were synthesized onto the porous alumina substrates. Both catalyst systems showed a good catalytic oxidation activity. The V/K/Ca system exhibited the lowest oxidation onset temperature (OOT) of about 359℃ with a composition of V/K/Ca=1:1:0.1 where the V and Ca and/or K elements could form a kind of amorphous phase that determined the catalytic activity. The V/Ks/Ce system displayed the lowest OOT of about 350℃ with a composition of V/Ks/Ce = 1:2:0.1 where the K_2SO_4 and K_5V_2O_3(SO_4)_4 phases could contribute most to the catalytic activity.
机译:将基于V / K / Ca和V / Ks / Ce体系的柴油机烟灰催化氧化催化剂合成到多孔氧化铝基底上。两种催化剂体系均显示出良好的催化氧化活性。 V / K / Ca体系的最低氧化起始温度(OOT)约为359℃,其组成为V / K / Ca = 1:1:0.1,其中V和Ca和/或K元素可以形成一种决定催化活性的非晶相。 V / Ks / Ce体系的最低OOT约为350℃,其组成为V / Ks / Ce = 1:2:0.1,其中K_2SO_4和K_5V_2O_3(SO_4)_4相对催化活性的贡献最大。

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