Apparatus for preparing germane gas and method for preparing monogermane gas using same
The present disclosure relates to an apparatus for preparing germane gas and a method for preparing monogermane gas using same. More particularly, the present disclosure relates to an apparatus for preparing germane gas, capable of stably producing a large amount of monogermane gas by mixing starting materials in short time and removing reaction heat at the same time using a reactor having a microstructured channel, and a method for preparing monogermane gas using same. In accordance with the present disclosure, it is easy to control rapid increase of reaction temperature and pressure during mass production of germane gas. Accordingly, monogermane gas can be produced in large scale with high yield.
1. A method for preparing monogermane gas, comprising:
injecting an aqueous alkali solution of starting materials and an aqueous acid solution into a first channel and a second channel, respectively, the aqueous alkali solution containing germanium dioxide (GeO 2 ) and an alkali metal hydride;
mixing the injected aqueous alkali solution of the starting materials and the aqueous acid solution in a third channel connected to the first channel and the second channel, and reacting the mixed solutions to produce monogermane gas and a reaction solution; and
discharging the produced monogermane gas and the reaction solution out of the third channel,
wherein reaction heat generated in the third channel is absorbed by a coolant circulating in a coolant circulation unit disposed adjacent to the third channel,
wherein the third channel is a microchannel.
2. The method for preparing monogermane gas according to claim 1 , wherein the third channel comprises a main channel and a plurality of projections formed on the main channel.
3. The method for preparing monogermane gas according to claim 2 , wherein the plurality of projections have an acute angle with respect to the main channel and protrude in one direction.
4. The method for preparing monogermane gas according to claim 1 , wherein the third channel is maintained at a temperature of 0-50° C.
5. The method for preparing monogermane gas according to claim 4 , wherein the temperature of the third channel is controlled by controlling at least one factor selected from a flow rate of the coolant, a temperature of the coolant, and a flow rate of the aqueous alkali solution of the starting materials or the aqueous acid solution.
6. The method for preparing monogermane gas according to claim 1 , wherein the reaction heat generated in the third channel is transferred to a first metal block surrounding the third channel, to a second metal block contacting with the first metal block, and to the coolant circulation unit surrounded by the second metal block as the coolant circulates in the coolant circulation unit.
7. The method for preparing monogermane gas according to claim 1 , the third channel is more than one in number, the third channels are connected in parallel, and the aqueous alkali solution and the aqueous acid solution are injected into the third channels so as to produce monogermane gas in the third channels.
8. The method for preparing monogermane gas according to claim 1 , wherein the alkali metal hydride is NaBH4.
9. The method for preparing monogermane gas according to claim 1 , wherein the aqueous acid solution comprises an inorganic acid or an organic acid, wherein the inorganic acid is one or more selected from a group consisting of sulfuric acid and phosphoric acid, and the organic acid is one or more selected from a group consisting of acetic acid and propionic acid.
10. An apparatus for preparing germane gas, comprising:
a first channel into which an aqueous alkali solution of starting materials is injected;
a second channel into which an aqueous acid solution is injected;
a third channel which is connected to the first channel and the second channel and in which the aqueous alkali solution and the aqueous acid solution are mixed and reacted to produce monogermane gas and a reaction solution;
a discharge outlet through which the monogermane gas and the reaction solution produced in the third channel are discharged; and
a coolant circulation unit which is disposed adjacent to the third channel and into and out of which a coolant is injected and discharged, wherein reaction heat generated in the third channel is absorbed by the coolant,
wherein the third channel is a microchannel.
11. The apparatus for preparing germane gas according to claim 10 , wherein the third channel and the coolant circulation unit are disposed spaced apart from each other, the third channel is surrounded by a first metal block, the coolant circulation unit is surrounded by a second metal block, and the first metal block and the second metal block are disposed in contact with each other.