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利用硫酸氧钒制备钒炭催化剂用于烟气脱硫

景文 ,  侯亚芹 ,  郭倩倩 ,  黄张根 ,  韩小金 ,  马国强

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引用本文: 景文, 侯亚芹, 郭倩倩, 黄张根, 韩小金, 马国强. 利用硫酸氧钒制备钒炭催化剂用于烟气脱硫[J]. 燃料化学学报, 2013, 41(10): 1223-1233. shu
Citation:  JING Wen, HOU Ya-qin, GUO Qian-qian, HUANG Zhang-gen, HAN Xiao-jin, MA Guo-qiang. Using vanadyl sulfate to prepare carbon-supported vanadium catalyst for flue gas desulfurization[J]. Journal of Fuel Chemistry and Technology, 2013, 41(10): 1223-1233. shu

利用硫酸氧钒制备钒炭催化剂用于烟气脱硫

    通讯作者: HUANG Zhang-gen,Fax:+863514053091;Tel:+863514134410.E-mail:zghuang@sxicc.ac.cn。
摘要: 利用硫酸氧钒制备钒炭催化剂用于烟气脱硫。研究发现,负载在活性炭上的硫酸氧钒极易被氧化为五价钒硫酸盐,这些五价钒硫酸盐具有很高的氧化SO2的活性,极大地促进了SO2在活性炭上的脱除。而且,通过煅烧可以将五价钒硫酸盐分解为五价钒氧化物,最佳煅烧温度为500℃,由于煅烧后用于储存硫酸的微孔孔容增加,SO2的吸附容量得到了进一步提高,由此表明,利用硫酸氧钒可以制备传统的V2O5/AC催化剂。为了获得完全氧化的钒物种,对煅烧后的催化剂进行了空气中预氧化,但由于含氧官能团的形成、炭载体的烧蚀以及钒的还原,预氧化不利于脱硫。此外,研究中得到初步证据证明脱硫过程中V2O5/AC催化剂中五价钒氧化物转变成了五价钒硫酸盐,结合五价钒硫酸盐所表现出的氧化SO2的能力,推测SO2在V2O5/AC上的脱除遵循以下机理:五价钒氧化物先转变为五价钒硫酸盐,后者催化氧化SO2为硫酸。

English

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  • 收稿日期:  2013-04-08
  • 网络出版日期:  2013-06-12
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