Carbonized rice husk needs to determine volatile matter, ash, fixed carbon and sulfur S. The sulfur content is determined by infrared carbon-sulfur analyzer, and the volatile matter, ash and fixed carbon content are determined by combustion method. The specific steps are as follows:

1. Weigh two crucibles with an electronic analytical balance and record;

2. Gradually add carbonized rice husk powder to about 500mg; Put it in a crucible with a small spoon;

3. Open the muffle furnace and set the temperature to 750℃. When the temperature reaches 750℃, put the bracket with crucible (with cover) in, take it out and cool it for 5 minutes, and measure the weight of two crucibles (we call it primary weight);

4. Set the muffle furnace at 700℃, remove the crucible cover, put it in the furnace at 700℃, keep the temperature for 90 minutes and then take it out.

Weigh the two crucibles (called secondary weight);

5. Calculate and record the contents of ash, volatile matter and fixed carbon.