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通过引入水蒸汽改进乙炔氢氯化反应中铜铋催化剂的再生性能,将催化剂多次循环反应评价其稳定性.结果表明,与传统的空气再生法6h循环再生造成近95%以上催化剂活性组分流失相比,引入水蒸汽可将催化剂表面在反应过程中形成的易升华的BiCl3转化为具有很好热稳定性的BiPO4,提高了催化剂的稳定性,经15h循环再生后活性组分Bi仅损失20%,且可保持初始反应活性,使催化剂的工业化成为可能.
By introducing steam to improve the regeneration performance of copper bismuth in acetylene hydrochlorination, the catalyst was evaluated for its stability by multiple cycles.The results showed that nearly 95% of the catalyst active components Compared with water loss, the introduction of water vapor can convert easily sublimable BiCl3 formed on the surface of the catalyst into BiPO4 with good thermal stability and improve the stability of the catalyst. After 15h of regeneration, the active component Bi only lost 20%, and can maintain the initial reactivity, so that the catalyst of industrialization possible.