The use of oxygen bomb calorimeters

Oxygen bomb calorimeter is a detection instrument that can infer the degree of deterioration of coal. It has many advantages such as flexible use, accurate measurement, high reliability, good stability and long service life. When users use the oxygen bomb calorimeter for some use of common sense is the need to grasp, the following Xiaobian to specifically introduce the use of oxygen bomb calorimeters common sense.

The use of oxygen bomb calorimeter:

1. The most common burners used for calorimetry are stainless steel burners, and it is the platinum burner that best guarantees complete combustion of coal samples.

2. The calorimetric heat system raises the heat absorbed by 1°C, called heat capacity, and its unit is J/°C.

3. When measuring the calorific value of coal with a constant-temperature calorimeter, the water temperature of the inner cylinder is generally adjusted to be slightly lower than the water temperature of the outer cylinder by about 1°C, so that the water temperature of the outer cylinder is slightly higher than that of the inner cylinder water after the coal sample is completely burned to ensure the end point of the measurement. The temperature of the water inside the cylinder was reduced.

4. Oxygen bombs are precision machined from stainless steel (high quality) and can withstand hydrostatic pressures up to 20 Mpa.

5. Calibrate the heat capacity of benzoic acid before drying and pressing the cake.

6. The calorific value of the calorimetric reference material benzoic acid is 265××J/g (the last two digits of ×× are uncertain), and its calorific value should be accurate to 1J/g.

7. Heat capacity can also be calibrated with cotton yarn. The requirement is the original white cotton thread and accurate weighing.

8. The main characteristic of the thermostatic calorimeter is that the water temperature of the outer cylinder remains basically constant during the measurement of heat. At the same time, the calorimeter has a simple structure and a low price, which is also its main advantage.

9. The calorific value of the cartridge is obtained by subtracting the difference between the heat of formation of sulfuric acid and sulfur dioxide and the heat of formation of nitric acid.

10. The high calorific value subtracts the latent heat of vaporization of the water generated by the combustion of hydrogen in the coal and coal, resulting in low calorific value.