Study on Volatile Matter during Combustion of Rice Hull
1980 Volume 42 Issue 3 Pages 383-389
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1980 Volume 42 Issue 3 Pages 383-389
This investigation was carried out to measure the properties of volatile matter during thermo-cracking process of rice hull. The results of this paper were as follows.
(1) The volatile matter was classified into three phases, gas, liquid and solid at room temperature. Fig. 2 showed the result in which rice hull was heated from room temperature to 600°C. step by step. The values of the mass ratio were gotten as to each phases. Amounts of the contents which organized the liquid phase and the solid phase were seemed to be comparatively large.
(2) Fig. 6 and 7 showed the results in case that rice hull was seated rapidly from room temperature to 350°C. and 600°C. Amount of volatile matter by rapid heating was larger than amount by step heating. The cracking process of rice hull seemed to be more proceeded in the former condition.
(3) Fig. 6 and 7 showed that gas phase was much in high temperature and rapid heating conditions. Cracking process of volatile matter seemed to be more proceeded under the conditions.
(4) The results of gas analysis showed in Fig. 4 through 7 that there were contained much CO2, O2 and CO in the volatile gas. Their amounts were increased under the rapid heating conditions of high temperature.
(5) Hydrocarbon and phenol compounds of high molecular were contained in other contents of the gas phase and the liquid phase. There might be higher molecular compounds in the solid phase. Under the rapid heating conditions of high temperature, the compounds were resolved into lower molecular compounds. As a result, amount of the compounds was decreased.
(6) Thermo-cracking process of organic compounds which organized rice hull was influenced by the heating conditions which related to the heating temperature and heating time. The compositions of the cracked matters seemed to change from more complex form into more simple form, which consisted of the elements shown in Table 4 and 5. The actual condition of thermo-cracked matter was understood as to the practical heating conditions.
