Miniature oxygen bomb for small calorimeter
A calorimeter and oxygen bomb technology, applied in the field of combustion heat determination, can solve the problems of measurement error, excessive temperature release of oxygen bomb, not satisfying Tian's equation, etc., and achieve the effect of improving accuracy and excellent corrosion resistance.
Active Publication Date: 2021-05-25
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology
[0006] The present invention intends to provide a new type of miniature oxygen bomb to solve the problem that the temperature in the oxygen bomb in the existing heat conduction microcalorimeter is too fast to satisfy the Tian equation and cause measurement errors.
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Embodiment Construction
[0025] see figure 1 , the miniature oxygen bomb includes:
[0026] The projectile body 7 is in the shape of a blind tube, with the nozzle facing upwards and a top cover 4 is provided. The oxygen bomb top cover 4 and the projectile body 7 are connected by threads, and an O-ring is used to ensure sealing. The bottom of the projectile body 7 is provided with air holes 12 , for feeding oxygen before burning and removing gas in the projectile after burning. The air hole 12 is equipped with a plug 11. In order to reduce the influence of the external interface temperature, the projectile 7 is made of stainless steel.
[0027] A pair of electrodes 5 are in the shape of rods and arranged in the projectile body 7, the upper end of which penetrates and is fixed on the top cover 4, an insulating layer is provided on the mating surface of the electrodes 5 and the top cover 4; one end of the firing wire 1 is connected to the electrode 5, The other end is connected to a power supply, and a ...
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The invention discloses a miniature oxygen bomb for a small calorimeter, which comprises a bomb body in the shape of a blind tube, with an upward tube opening and provided with a top cover, wherein the bottom of the bomb body is provided with an air hole for introducing oxygen and discharging gas in the bomb body, and the air hole is provided with a plug; a pair of rod-shaped electrodes arranged in the bomb body, wherein the upper ends of the electrodes penetrate through and are fixed on the top cover, and the matching surfaces of the electrodes and the top cover are provided with insulating layers; the support is fixed at the lower end of one electrode, the crucible is placed on the support, and the crucible is used for containing a sample to be detected; a ignition platinum wire two ends of which are respectively fixed on the two electrodes. The bomb body is of a sandwich structure and is provided with an inner layer and an outer layer, and an air layer is arranged between the inner layer and the outer layer, so that heat in the oxygen bomb can be slowly released, a heat flow curve of chemical reaction accompanying a large amount of heat is suitable for a Tian equation, a sharp and steep thermoelectric force curve becomes gentle, and the measurement accuracy is improved.
Description
technical field [0001] The invention belongs to the technical field of combustion heat measurement and relates to a calorimeter, in particular to a miniature oxygen bomb used for a small calorimeter. Background technique [0002] The heat of combustion refers to the heat generated when 1 mole of combustibles are fully combusted in oxygen to form stable compounds at 25°C and 101kPa. [0003] The traditional methods for measuring the heat of combustion of substances are all based on the water equivalent method. The heat released by the complete combustion of the sample increases the water temperature, and the heat of combustion of the sample is calculated indirectly by measuring the temperature change of the system. The water equivalent method is a classic method for determining the heat of combustion of the sample. Due to the large specific heat capacity of water, in order to obtain more accurate thermochemical data, it is usually necessary to increase the water temperature b...
Claims
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Login to View More IPC IPC(8): G01N25/22
CPCG01N25/22
Inventor 金波楚士晋彭汝芳陶静静张青春黄琪
Owner SOUTHWEAT UNIV OF SCI & TECH