综合智慧能源 ›› 2023, Vol. 45 ›› Issue (5): 39-45.doi: 10.3969/j.issn.2097-0706.2023.05.005

• 生物质热转化过程 • 上一篇    下一篇

酸洗和磷酸浸渍对浮萍热解特性的影响研究

杨伟1(), 吕雷达1, 彭诗阳2,3, 李威2,3, 蔡红春2,3, 韩勇1, 朱有健1,*(), 杨海平4, 赵海5   

  1. 1.郑州轻工业大学 能源与动力工程学院,郑州 450002
    2.禹州市鑫恒环境科技有限公司,河南 禹州 452570
    3.禹州市鑫恒现代农业创新研究院有限公司,河南 禹州 452570
    4.华中科技大学 煤燃烧国家重点实验室, 武汉430074
    5.中国科学院成都生物研究所,成都 610041
  • 收稿日期:2022-10-31 修回日期:2022-12-25 出版日期:2023-05-25 发布日期:2023-05-27
  • 通讯作者: *朱有健(1987),男,副教授,博士,从事生物质资源高值化利用等方面的研究, yjzhu01@hotmail.com。
  • 作者简介:杨伟(1988),男,讲师,博士,从事可再生能源清洁利用等方面的研究, weiyang_4105@yeah.net
  • 基金资助:
    郑州轻工业大学博士科研基金项目(2019BSJJ010);国家自然科学基金项目(51706210);河南省高等学校重点科研项目(23A470008)

Effect of acid pickling and phosphoric acid impregnation on pyrolysis characteristics of duckweed

YANG Wei1(), LYU Leida1, PENG Shiyang2,3, LI Wei2,3, CAI Hongchun2,3, HAN Yong1, ZHU Youjian1,*(), YANG Haiping4, ZHAO Hai5   

  1. 1. School of Energy and Power Engineering, Zhengzhou University of Light Industry,Zhengzhou 450002, China
    2. Yuzhou Xinheng Environmental Technology Company Limited, Yuzhou 452570, China
    3. Yuzhou Xinheng Modern Agriculture Innovation Research Institute Company Limited, Yuzhou 452570, China
    4. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology,Wuhan 430074, China
    5. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2022-10-31 Revised:2022-12-25 Online:2023-05-25 Published:2023-05-27
  • Supported by:
    Doctoral Scientific Research Foundation of Zhengzhou University of Light Industry(2019BSJJ010);National Natural Science Foundation of China(51706210);Key Scientific Research Projects of Colleges and Universities in Henan Province(23A470008)

摘要:

基于当前浮萍热解研究不足的现状,探究浮萍热解特性及磷对热解气体产物特性的影响。采用酸洗及磷酸浸渍的方法对浮萍进行处理,使用热重红外联用仪探究酸洗和磷酸浸渍对浮萍热解特性及气体产物特性的影响。研究发现酸洗明显降低了浮萍的灰分含量且改变了灰分组分,提高了样品的热值及C,H,N,O的质量分数。热重试验发现浮萍热解主要分为4个阶段,热解反应主要发生在145~520 ℃,微商热重(DTG)曲线呈双峰分布。酸洗导致热解初温升高10 ℃,降低了浮萍热解后的固体产物产量,降低了最大失重峰温度,但最大失重速率上升。磷酸浸渍明显提高了浮萍热解后的固体产物产量,同时降低了热解的最大失重峰温度及最大失重速率。酸洗使热解气体产物CH4含量升高,而磷酸浸渍则促使CH4,CO2,NH3等气体产量显著增加且明显扩大了NH3的释放区间。

关键词: 浮萍, 酸洗, 磷酸, 浸渍, 热解, 热重, CH4, CO2, NH3

Abstract:

Based on the deficiencies of the researches on duckweed pyrolysis, the effects of duckweed pyrolysis and phosphorus on the characteristics of pyrolysis gas products were explored. Pickling and phosphoric acid impregnation were used to treat duckweed,and their treatment effects on the pyrolysis characteristics and gas product characteristics of duckweed were investigated by TG-FTIR. It was found that pickling significantly reduced the ash content of duckweed and changed its ash components. In addition, pickling increased the contents of C, H, N and O, and increased the calorific value of the samples. Thermogravimetric results showed that duckweed pyrolysis was mainly divided into four stages. Pyrolysis reaction mainly occurred between 145 and 520 ℃, and the pyrolysis DTG curve showed bimodal distribution. Pickling resulted in a 10 ℃ initial temperature rise, drops of solid product yield after duckweed pyrolysis and the maximum weight loss temperature, and an increase of the maximum weight loss rate. Phosphoric acid impregnation significantly increased the yield of solid products of duckweed pyrolysis, and decreased the maximum weight loss temperature and the maximum weight loss rate. Pickling increased the content of CH4, while phosphoric acid impregnation significantly facilitated the production of CH4, CO2 and NH3, and greatly widened the release range of NH3.

Key words: duckweed, acid pickling, phosphoric acid, impregnation, pyrolysis, thermogravimetry, CH4, CO2, NH3

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