Gas generator
A gas generator is used in the chemical laboratory to produce various gases such as hydrogen , carbon dioxide , hydrogen sulfide or sulfur dioxide . The Kipp apparatus is a special version . In the simplest case, the gas generator is a gas generator that is used to produce smaller amounts of gas, even on a semi-micro scale.
functionality
The gases are usually released through reactions of a mineral acid (e.g. hydrochloric acid ) and a coarse-grained solid such as zinc for hydrogen, calcium carbonate for carbon dioxide or iron (III) sulfide for hydrogen sulfide production.
The gas evolution bottle serves to take up the acid. The insert in the bottle is filled with the solid. The insert has a small opening at the bottom or is provided with a kind of sieve at the bottom through which the acid can get to the solid. The gas produced during the reaction is taken off at the top through a valve. If no gas is withdrawn, the gas pushes back the acid and the reaction is initially over.
The gases can in a further step, for. B. cleaned in a downstream gas washing bottle before actual use or dried with a drying tube.
literature
- G. Meyendorf: laboratory equipment and chemicals, Aulis Verlag Cologne 1975, ISBN 3-7614-0285-6