Platinum lighter
The platinum lighter , also known as the Döbereiner lighter , is one of the first modern lighters . It was further developed from the Fürstenberg lighter by Johann Wolfgang Döbereiner in 1823 and sold until around 1880. The largest manufacturer was Gottfried Piegler in Schleiz .
In the Deutsches Museum , the Kulturhistorisches Museum Schloss Merseburg , the Städtisches Museum in Braunschweig , in the old pharmacy in the Heidelberg Castle , in the Goethe National Museum in Weimar , in the Mineralogical Collection in Jena and in the Museum Bayerisches Vogtland in Hof , Döbereiner's birthplace, there are platinum lighters in the To see exhibitions.
Function of the platinum lighter
In a glass device filled with dilute sulfuric acid there is a glass bell with a zinc piston. The upper end of the bell jar is closed with a valve that can be opened by a lever, whereupon the gas escapes from the bell, the sulfuric acid rises in the bell jar and reacts with the zinc . This reaction creates hydrogen , which escapes through the valve and is passed over a " platinum sponge " (finely divided platinum).
The platinum catalyzes the reaction of hydrogen with oxygen (2 H 2 + O 2 → 2 H 2 O: oxyhydrogen reaction ). The heat released during this process ( exothermic reaction ) ignites the gas mixture and burns to form water.
If you let go of the lever, the valve is closed again and the flame goes out. The hydrogen gas can no longer escape upwards and pushes the acid out of the bell jar back into the storage vessel. When the acid level in the bell jar drops below the zinc, the formation of hydrogen stops.
Web links
Individual evidence
- ↑ Fire generating devices . www.ijon.de. Retrieved November 29, 2009.
- ↑ Thoughts on Fire, by Joachim Acker . www.pfeife-tabak.de. Retrieved November 29, 2009.
- ↑ John M. Thomas: The RSC Faraday prize lecture of 1989. Ed .: Chem. Commun. No. 53 . Royal Society of Chemistry, London 7 August 2017, p. 9185-9197 .