O-06　木質バイオマス水蒸気ガス化時のタール放出挙動の解析

抄録

To improve energy conversion efficiency, it is effective to convert solid biomass into gaseous fuel by gasification. However, tar emission during gasification process is crucial problem as it causes mechanical troubles in gas engines downstream. Therefore, it’s important to elucidate tar emission behavior and lower emission mass. To lower tar emission, we considered that steam reforming of tar might be effective, so we conducted steam gasification experiment and compared with pyrolysis. In the experiment, we analyzed syngas yields and sampled tar using vertical batch furnace. To analyze physical properties of tar, we conducted GC/MS and FD-MS. About steam gasification compared to pyrolysis, it was found that CO₂ and H₂ yields increased and tar emission increased to double. From molecular weight distributions of tar, the increase of tar emission were observed all over the range in the measured molecular weight.