乙醇麦草浆洗涤前后臭氧脱木素的对比研究(英文)

DIRECTLY DELIGNIFYING AUTO-CATALYZED ETHANOL WHEAT STRAW PULP WITH OZONE

本试验主要对未洗乙醇浆直接臭氧脱木素,然后再经过乙醇水洗涤后纸浆卡伯值的变化进行了初步研究,并和洗涤后纸浆臭氧处理进行比较.结果表明:未洗乙醇浆直接臭氧脱木素对降低卡伯值非常有效,用0.5%的臭氧即可将卡伯值从128降低到34,这对于制取低卡伯值乙醇浆提出了新的思路和工艺.并与臭氧处理OP浆进行了对比,初步证明前者卡伯值降低率大于后者的原因除与乙醇浆中的还原性物质有关外,也与吸附木素形态及木素在纤维中的存在位置有关.

This paper describes the extent to which lignin in unwashed auto-catalyzed ethanol wheat straw pulp is removed directly by ozone, based on kappa number analyses. For comparison, ozone bleaching OP pulp was also studied. The results show that lignin precipitates on the washed pulp fiber surfaces in a heterogeneous and spherical way and that lignin particle can be seen using light microscopy. The lignin remaining in the unwashed pulp was effectively removed directly by ozone, and the kappa number dramatically decreases from 128 to 34. This is much more than that of the OP pulp bleached with ozone, which depends on the deoxidization substance in ethanol pulp, the lignin-adsorbed morphology, and the location of the residual lignin. New ideas and technologies were introduced concerning the production of auto-catalyzed ethanol wheat straw pulp with comparable kappa number.