基于TDLAS的H2S气体材料表面吸附特性研究
Study of H2S gas adsorption characteristics on material surfaces based on TDLAS
金建新 1刘威 2宋振明 1朱志辉 1田冰 1彭志敏3
作者信息
- 1. 浙江浙能嘉华发电有限公司,浙江平湖 314201
- 2. 中国矿业大学(北京)化学与环境工程学院,北京 100083
- 3. 清华大学能源与动力工程系电力系统及发电设备控制与仿真国家重点实验室,北京 100084
- 折叠
摘要
在H2S气体浓度在线监测过程中,因其具有粘附性强的特点,容易发生管线吸附,从而导致测量结果存在偏差,尤其在痕量H2S检测过程中表现最为明显,所以开展H2S气体管线材料表面吸附特性研究尤为必要.本文基于可调谐二极管激光吸收光谱技术(TDLAS),设计并搭建了一套H2S浓度在线测定系统,并对该系统进行了测量性能检验,在此基础上进行了 H2S在不锈钢材料表面常温吸附特性探究.实验结果表明,所搭建H2S浓度在线测定系统具有稳定性强、检测限低和灵敏度高的特点,利用此系统可以实现痕量H2 S浓度的在线连续测定.经过一系列探究试验,证明了 H2S在不锈钢材料表面存在明显且稳定的吸附作用,得出了 H2S在不锈钢材料表面的单位面积吸附量在1014(个/cm2)量级.实验结果可以为痕量硫化氢在线精准测量提供一定参考.
Abstract
In the process of online monitoring of H2 S gas concentration,due to its strong adhesion,it is easy to occur pipeline adsorption,resulting in deviations in measurement results,especially in the process of trace H2S detection.Therefore,it is particularly necessary to study the surface adsorption characteristics of H2S gas pipeline materials.In this work,a set of online H2S concentration measurement system is designed and constructed based on tunable diode laser absorption spectroscopy(TDLAS),and the measurement performance of the system is tested.On this basis,the adsorption characteristics of H2S on the surface of stainless steel materials at room temperature are investigated.The experimental results show that the online H2S concentration determination system has the characteristics of strong sta-bility,low detection limit and high sensitivity,and can be used to achieve on-line continuous determination of trace H2S concentration.After a series of experiments,it is proved that H2S has obvious and stable adsorption effect on the surface of stainless steel material,and the adsorption capacity per unit area of H2 S on the surface of stainless steel ma-terial is 1014(PCS/cm2).The experimental results can provide a certain reference for on-line accurate measurement of trace hydrogen sulfide.
关键词
TDLAS/H2S/测量系统/材料表面/吸附特性Key words
TDLAS/H2S/measuring system/material surface/adsorption characteristic引用本文复制引用
基金项目
华能集团总部科技项目基础能源科技研究专项(三)(HNKJ22-H105)
中央高校基本科研业务费专项(2023YQ002)
国家自然科学基金(11972213)
出版年
2024
NETL
NSTL
万方数据