Devices and methods for multi-system biomass and coal co-combustion to prepare graphite sample

A device for multi-system biomass and coal co-combustion to prepare a graphite sample, comprising:

• an oxygen cylinder;
• a transition assembly configured to cool combustion flue gas at a high temperature;
• a flue gas filter connected to the transition assembly and configured to remove particulate impurities from the combustion flue gas;
• an impurity gas absorption assembly connected to the flue gas filter via a glass tube and configured to remove impurity gas from the combustion flue gas;
• a transfer assembly connected to both ends of the glass tube and configured to remove moisture and the impurity gas from the combustion flue gas;
• and
• a raw sample oxidation assembly connected to the glass tube and configured to enable biomass or coal to react independently to produce carbon dioxide;
• wherein
• the transition assembly includes a transition head connected to a high temperature zone of a tubular furnace and a conical flask sleeved on the transition head, the conical flask is placed in a water tank, and a low temperature zone of the tubular furnace is connected to the oxygen cylinder;
• the device further comprises a first subsystem, a second subsystem, and a third subsystem;
• the first subsystem is configured to produce carbon dioxide by burning the biomass or the coal independently to prepare the graphite sample;
• the second subsystem is configured to produce carbon dioxide by co-combusting the biomass and the coal to prepare the graphite sample;
• the third subsystem is configured to produce carbon monoxide by co-combusting the biomass and the coal to prepare the graphite sample;
• the first subsystem includes the raw sample oxidation assembly, the transfer assembly, and a vacuum pump connected sequentially,
• the second subsystem includes the oxygen cylinder, the tubular furnace, the transition assembly, the flue gas filter, the transfer assembly, and the vacuum pump connected sequentially;
• and
• the third subsystem includes the oxygen cylinder, the tubular furnace, the transition assembly, the flue gas filter, the impurity gas absorption assembly, the transfer assembly, and the vacuum pump connected sequentially.