Hydrogen concentration measurement in high temperature applications using hydrogen permeation
| Autor: | Jonas M. Leimert, Jürgen Karl, Alexander Bartolf |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Hydrogen
Renewable Energy Sustainability and the Environment Cryo-adsorption High-pressure electrolysis Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element Nanotechnology 02 engineering and technology Chemical reactor 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrogen sensor Pressure sensor 0104 chemical sciences Fuel Technology chemistry Tube (fluid conveyance) 0210 nano-technology Compressed hydrogen |
| Zdroj: | International Journal of Hydrogen Energy. 41:14360-14367 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.05.061 |
| Popis: | With the increasing use of hydrogen in energy process engineering and as chemical reactant, the importance of hydrogen sensors is rising. However, there are few established methods to measure the hydrogen concentration of a gas-mixture at high temperatures. Also the in situ measurement at these temperatures in chemical reactors is challenging. A sensor, which is based on hydrogen permeation, could be a cheap and practical solution for the in situ measurement at high temperatures. A permeation hydrogen sensor for the measurement of the hydrogen partial pressure was developed and built. The concept of the sensor is a small, hermetically sealed nickel tube working as a hydrogen permeable membrane filled with pure hydrogen. It is in contact with the measurement gas and connected to a pressure sensor. Under stationary conditions a equilibrium between the hydrogen partial pressure of the tube and the measurement gas will be established. Since the tube is filled only with hydrogen, the pressure sensor connected with the nickel-tube measures the hydrogen partial pressure of the measurement gas. Such a sensor was modeled, developed, built and characterized. The most important calculations, the general design of the sensor as well as the most important results of the experiments are presented in this paper. The sensor worked with a good accuracy and showed a response time of about 1000 s at 60 °C and 200 s at 900 °C. A response time lower than 200 s for temperatures above 600 °C is possible with an improved sensor design. Also, an in-situ measurement of the steam content inside a shift reactor was conducted, the results matched the calculated steam contents from a reactor balance very precisely. |
| Databáze: | OpenAIRE |
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