神木烟煤热解产物分布及主要元素的迁移规律

在石英管固定床反应器中对神木烟煤进行热解实验，研究了热解温度对煤热解产物分布和C, H, O, N, S元素在热解产物中分配的影响. 结果表明，在500?900℃范围内，随热解温度升高，半焦产率下降，气体产率增大，焦油产率先增大后降低，600℃时达最大值9.2%(ω)；半焦中C, H, O和N元素迁入量下降，S元素迁入量先降低后略有增大，在700℃时达最小值67.0%；热解气中C, H, O元素迁入量增大，N元素和S元素迁入量先增大后减小，分别在800和600℃时达最大值28.8%和27.9%；焦油中C, H, O元素迁入量先增大后降低，均在600℃时分别达最大值9.3%, 14.0%和7.2%，N元素和S元素迁入量缓慢增加；热解水中H和O元素迁入量先增大后略有降低，在700℃时分别达最大值14.5%和48.5%.

Distribution of Products and Migration of Main Elements during Pyrolysis of Shenmu Bituminous Coal

The effect of pyrolysis temperature on distribution of products and migration of main elements (C, H, O, N, S) during pyrolysis of Shenmu bituminous coal was investigated in a fixed-bed quartz reactor. The results showed that with the pyrolysis temperature increasing from 500℃ to 900℃, the char yield decreased and the gas yield increased continuously, while the tar yield increased to a maximum of 9.2%(?) at 600℃ and then declined. When the pyrolysis temperature increased, the transfer ratios of C, H, O and N in the char decreased, and the transfer ratio of S in the char decreased firstly and then increased with the minimum ratio of 67.0% at 700℃. With the increase of temperature, the transfer ratios of C, H and O in the gas increased, and the transfer ratios of N and S in the gas increased firstly and then decreased at 800 and 600℃ with the maximum values of 28.8% and 27.9%, respectively. The transfer ratios of C, H and O in the tar increased firstly to the maximum values of 9.3%, 14.0% and 7.2% at 600℃, respectively, and then decreased, while the transfer ratios of N and S slightly increased with the pyrolysis temperature increasing. The transfer ratios of H and O in the water increased firstly to the maximum values of 14.5% and 48.5% at 700℃, respectively, and then decreased slightly with pyrolysis temperature increasing.