Production of Gaseous Fuel from High-Ash Tailings by Pyrolysis

he characteristics of pyrolysis gaseous are conducted out in a laboratory pyrolysis unit with a 30 g charge at vary finial temperature .Based on isothermal thermogravimetric analysis (TGA) was also applied to study the effects of heating rate on the pyrolysis characteristics of tailings in nitrogen atmosphere. The TG/DTG results show that the heating rate increases, the temperature of volatile matter initiation increases, the total volatile matter evolved decreases and the DTG peak shifts toward higher temperature range. The experiment indicated that with increasing heating temperature in rank, total gas, caloric value, H2 and CO yields gradually increases and CH4 and CO2 first increase and then decrease for all samples. The evolution behavior of gaseous products during primary devolatilisation (400–550°C)and secondary devolatilisation (700–850°C) was also discussed. The results showed that the gas yield was up to 4.306L and the largest capacity hydrogen production was 1.72L in the 950°C and by the charge (30 g ).