关键词: 秸秆灰, 煤焦, 气化反应性, 碘吸附值

Abstract: Potassium and calcium have an important effect on gasification reactivity of coal char. There are rich potassium and calcium in straw ash. The effect of straw ash on the gasification reactivity of Shenmu coal char was studied with thermal analyzer STA409PC，and specific surface area and pore structure of coal char were analyzed by measuring iodine adsorption value of coal char. The gasification reactivity of coal char from co-coking with coal and corn straw was superior to coal char alone，which was associated with the adding proportion of corn straw. The gasification reactivity of coal char from co-coking with coal and de-ashed corn straw was similar to pure coal char. When straw ash equivalent to corn straw ash was added to coal char，the gasification reactivity was superior to that of coal char from co-coking with coal and corn straw The iodine adsorption value determination of coal char showed that the iodine adsorption value of coal char from co-coking with coal and de-ashed corn straw was the maximum，and the iodine adsorption value of pure coal char was the minimum，which showed that corn straw and straw ash had an important influence on specific surface area and pore structure of coal char，basically identical with the gasification reactivity evaluation results.

Key words: straw ash, coal char, gasification reactivity, iodine adsorption value