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采用软化学法合成了一系列Cs2SO4与V2O5不同摩尔比、具有低共熔点的Cs2SO4.V2O5共融盐,在热分析仪上确定了其共熔点,通过程序升温氧化实验考察了该共融盐催化剂在碳烟颗粒消除中的催化性能,重点研究了催化剂与碳烟颗粒间的接触模式,以及NO,SO2对催化剂性能的影响.结果表明:当Cs2SO4与V2O5的摩尔比为0.55∶0.45时,Cs2SO4.V2O5共融盐具有最低共熔点,其与碳烟颗粒在接近真实使用情况的松散接触时具有最优的催化活性.该共融盐对碳烟颗粒氧化所表现的高催化活性,是由于在反应条件下碳烟颗粒在催化剂表面被充分润湿而提高了两者的接触程度所致.在反应气氛中,加入NO对该共融盐催化剂的活性没有影响;添加少量SO2会导致其催化活性降低,但与其他碳烟颗粒氧化催化剂相比,该共融盐催化剂表现出最优的抗硫中毒能力.
A series of Cs2SO4.V2O5 eutectic salts with different molar ratios of Cs2SO4 and V2O5 were synthesized by soft chemistry. The eutectic point of Cs2SO4.V2O5 was determined by a thermal analyzer. The eutectic salt catalyst The catalytic properties of the soot particles in the removal of soot are investigated, and the contact modes between the soot particles and the soot particles and the effects of NO and SO2 on the catalyst performance are investigated. The results show that when the molar ratio of Cs2SO4 to V2O5 is 0.55: 0.45, .V2O5 co-thawed salt has the lowest eutectic point, which has the best catalytic activity with the loose contact of soot particles close to the real use condition.The high catalytic activity of the eutectic salt for the oxidation of soot particles is due to Under the reaction conditions, the soot particles were wetted on the catalyst surface to improve the degree of contact between the two catalysts. In the reaction atmosphere, adding NO did not affect the activity of the co-salt catalyst; adding a small amount of SO2 resulted in its catalytic activity , But compared with other soot particulate oxidation catalysts, the co-salt catalysts show the best anti-sulfur poisoning ability.