无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (1): 59-66.doi: 10.19964/j.issn.1006-4990.2023-0099

• 研究与开发 • 上一篇    下一篇

磷酸三丁酯脱色活性炭热解再生研究

张颖1,2(), 李军2, 金央2, 黄美英1()   

  1. 1.重庆三峡学院环境与化学工程学院,重庆 404020
    2.四川大学化学工程学院,四川 成都 610065
  • 收稿日期:2023-02-27 出版日期:2024-01-10 发布日期:2024-01-18
  • 通讯作者: 黄美英(1971— ),女,教授,主要研究方向为磷化工与分离提纯技术;E-mail:hmytwo@sina.com
  • 作者简介:张颖(1998— ),女,硕士,主要研究方向为固废资源化利用;E-mail:1723279564@qq.com

Study on pyrolysis regeneration of activated carbon for Tributyl phosphate decolorization

ZHANG Ying1,2(), LI Jun2, JIN Yang2, HUANG Meiying1()   

  1. 1. School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404020, China
    2. School of Chemical Engineering, Sichuan University, Chengdu 610065, China
  • Received:2023-02-27 Published:2024-01-10 Online:2024-01-18

摘要:

以磷酸三丁酯(TBP)脱色后的粉末废活性炭(WAC)为材料,利用高温热解的方法,以亚甲基蓝吸附量和碘值为评价指标,研究了再生温度、再生时间、再生次数对废活性炭再生效果的影响。实验结果表明,WAC的再生最优条件为500 ℃下再生90 min,再生4次仍能恢复其82%的亚甲基蓝吸附性能及67%的碘吸附性能。通过同步热分析仪(TG-DSC)测定活性炭的失重、吸热和放热情况;借助比表面积及孔径分析仪、傅里叶红外光谱仪(FT-IR)、扫描电子显微镜(SEM)等测试手段对再生前后的活性炭进行表征,从而验证其再生效果。对废活性炭的热解机理进行了综合分析,为湿法磷酸净化工艺流程中磷酸三丁酯脱色活性炭的热解再生提供了理论指导。

关键词: 湿法磷酸, TBP, 废活性炭, 热解再生

Abstract:

The effect of regeneration temperature,regeneration time,and regeneration frequency on the regeneration efficiency of waste activated carbon(WAC) was studied by high-temperature pyrolysis method,using methylene blue adsorption amount and iodine value as evaluation indicators,using powdered activated carbon(WAC) decolorized with tributyl phosphate(TBP) as the materials.The experimental results showed that the optimal regeneration condition of activated carbon was 500 ℃ for 90 min.After the fourth regeneration,the adsorption properties of 82% methylene blue and 67% iodine could be recovered.The weight loss,heat absorption and heat release of activated carbon during pyrolysis were analyzed by TG-DSC,and the activated carbon before and after regeneration were characterized by the specific surface area and aperture analyzer,FT-IR,SEM and other testing methods to verify its regeneration effect.This research gave a comprehensive analysis of the pyrolysis mechanism of spent activated carbon,which provided theoretical guidance for the pyrolysis regeneration of decolorized activated carbon from TBP in a wet phosphoric acid purification process.

Key words: wet-process phosphoric acid, TBP, waste activated carbon, thermal regeneration

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