Boron -oxide coating method of combustion reactor under laboratory conditions

Abstract

The invention relates to a boron oxide film-plating method, in particular to a boron oxide film-plating method of a combustion reactor under the condition of a laboratory. The preheat temperature of the combustion reactor is 80 DEG C, sodium borate is added to a sodium borate saturated solution prepared from ethanol water, and the temperature is kept to be 60 DEG C; the sodium borate saturated solution is slowly sprinkled along the inner wall of the upper end of the combustion reactor, and is uniformly distributed on the inner wall of the combustion reactor; high purity nitrogen gas is led to the combustion reactor in a tubular heating furnace of 180 DEG C, and pumping is performed for one hour by a vacuum pump, until a white crystallizing layer is uniformly generated on the inner wall of the combustion reactor; the temperature is raised to 500 DEG C, until the white crystallizing layer turns into changed colorless and transparent. The boron oxide film-plating method of the combustion reactor under the condition of the laboratory, provided by the invention, is suitable for film plating of a small scaled even micro reactor in the laboratory, and an operating method is simple and practicable.

Description

technical field [0001] The invention relates to a boron oxide coating method, in particular to a boron oxide coating method for a combustion reactor under laboratory conditions. Background technique [0002] Boron oxide (B 2 o 3 ) is a multifunctional important inorganic chemical raw material, which is mostly used in the glass industry, which can improve the heat resistance and transparency of glass products, increase the mechanical strength, and shorten the melting time. [0003] Boron oxide coatings were first used in kinetic studies to explore the explosive limits of oxygen and hydrogen (Alfred Egerton and D.R.Warren, 1951). The researchers coated the inner surface of a mixing vessel of oxygen and hydrogen with a thick layer of B 2 o 3 Membrane, when hydrogen and oxygen are mixed in a certain proportion to explode, B 2 o 3 The membrane will be broken into fragments according to B 2 o 3 The arc of membrane fragments can be used to determine the gas flow pattern aft...

AI Technical Summary

Problems solved by technology

For example at a volume of 10cm 3 In the micro-combustion reactor, if B 2 o 3 Uneven coating thickness, or too thick, will affect the effective combustion reaction space, thereby affecting the reaction residence time

In addition, there is no more standardized B 2 o 3 Membrane fabrication methods are therefore various in the literature B 2 o 3 The quality of the membrane is not uniform, so the impact on the system is not the same, which is not conducive to the comparison and expansion of research results

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