Adsorption Characteristics of γ-Al2O3 for the Environment-friendly Insulating Medium C3F7CN/N2 and Its Decomposition Products

XIAO Song; ZHANG Ji; ZHANG Xiaoxing; CHEN Dachang; FU Mingli; TANG Ju; LI Yi

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Adsorption Characteristics of γ-Al₂O₃ for the Environment-friendly Insulating Medium C₃F₇CN/N₂ and Its Decomposition Products

更新时间：2025-12-08

- Adsorption Characteristics of γ-Al₂O₃ for the Environment-friendly Insulating Medium C₃F₇CN/N₂ and Its Decomposition Products
- Vol. 44, Issue 10, Pages: 3135-3140(2018)
- 作者机构：
  
  1. 武汉大学电气工程学院
  2. 直流输电技术国家重点实验室(南方电网科学研究院有限责任公司)
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 October 2018，
  
  Published：2018
- 稿件说明：
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XIAO Song, ZHANG Ji, ZHANG Xiaoxing, et al. Adsorption Characteristics of γ-Al₂O₃ for the Environment-friendly Insulating Medium C₃F₇CN/N₂ and Its Decomposition Products[J]. 2018, 44(10): 3135-3140.
DOI：

XIAO Song, ZHANG Ji, ZHANG Xiaoxing, et al. Adsorption Characteristics of γ-Al₂O₃ for the Environment-friendly Insulating Medium C₃F₇CN/N₂ and Its Decomposition Products[J]. 2018, 44(10): 3135-3140. DOI：

摘要

高压电气设备内部放电会造成气体分解并影响系统安全性

因此有必要测试传统常用吸附剂活性氧化铝（γ-Al

）对新型环保绝缘气体分解产物的吸收性能

并为寻找合适吸附剂提供理论基础。为此

首先在气体绝缘性能测试平台开展了C

CN/N

混合气体放电试验

检测到以CF

、C

、CF

CN、C

、C

和C

CN等为主的分解产物;其次采集了不同时期气体样本

并利用气相色谱质谱联用仪对被γ-Al

吸附前后的气体进行了对比检测;最终基于密度泛函理论

构建吸附剂和气体分子模型

分析并验证吸附效果。研究发现

γ-Al

可以吸附C

CN及其主要的放电分解产物

对C

CN的吸附效果甚至强于其他产物

难以作为C

CN类新型环保绝缘气体吸附剂放置于设备内部

但由于γ-Al

成本较低

因此可用于新型环保绝缘气体废气处理。

Abstract

The discharge in high-voltage electrical equipment may cause the decomposition of gas and has impact on power system security. It is necessary to test the adsorption characteristics of γ-Al

to the decomposition product of the new environment friendly insulating gas. Firstly

CN/N2 mixed ga

s discharge experiment was performed in the gas insulation performance test platform

and the main decomposition products such as CF

F-6 and C

CN were detected. Secondly

gas samples were collected in different environmental phases and analyzed by GC-MS before and after adsorption by γ-Al

. Finally

adsorbent and gas molecular models were constructed based on the density functional theory to analyze and verify the adsorption effect. It is found that γ-Al

can adsorb C

CN and its main discharge decomposition products. The adsorption effect of γ-Al

to C

CN is even stronger than its products

so it is difficult to be used as an adsorbing material for C

CN type gas insulated equipment. However

due to the low cost of γ-Al

it can be used in waste gas treatment for new environment-friendly insulating gas.

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