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首页> 外文期刊>Journal of Wood Chemistry and Technology >The Impact of Xylanase and Hot Acid Pretreatment on HexAs in Eucalyptus Kraft Pulp Bleaching
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The Impact of Xylanase and Hot Acid Pretreatment on HexAs in Eucalyptus Kraft Pulp Bleaching

机译：木聚糖酶和热酸预处理对桉木牛皮纸浆漂白HexAs的影响

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摘要

The influence of the presence of hexenuronic acid (HexA) in eucalyptus kraft pulp on the efficiency of D(0)EpD(1) was investigated by separately using both commercial cellulase-free xylanase and hot acid pretreatments. In comparison to the xylanase pretreatment, the hot acid pretreatment was more than four-fold effective in removing the HexAs (61%) and concomitantly reduced the kappa number, but resulted in lower viscosity. After subsequent D(0)EpD(1) bleaching, the final brightness and its stability were improved remarkably, especially under xylanase pretreatment. At the same brightness of 85% ISO, the xylanase pretreatment reduced the consumption of active chlorine (35.6%) more than the acid pretreatment did (27.5%). The total relative active chlorine savings for the xylanase pretreatment over the acid pretreatment was therefore nearly 23%. The HexA component can be removed considerably in both D-0 and D-1 stages during the D(0)EpD(1) bleaching sequence, while only slightly in the Ep stage. The use of xylanase and acid pretreatment both resulted in insignificant physical strength losses for the bleached pulps.
机译：分别使用无纤维素酶的木聚糖酶和热酸预处理方法分别研究了桉树牛皮纸浆中己糖醛酸（HexA）的存在对D（0）EpD（1）效率的影响。与木聚糖酶预处理相比，热酸预处理在去除HexAs（61％）和降低kappa值上的效率提高了四倍以上，但粘度较低。在随后的D（0）EpD（1）漂白后，尤其是在木聚糖酶预处理下，最终亮度和稳定性得到了显着改善。在相同的85％ISO亮度下，木聚糖酶预处理比酸预处理（27.5％）减少的活性氯消耗量（35.6％）。因此，与酸预处理相比，木聚糖酶预处理的总相对活性氯节省量接近23％。在D（0）EpD（1）漂白过程中，可以在D-0和D-1阶段中都将HexA组分大量除去，而在Ep阶段中，可以将其除去得很少。木聚糖酶和酸预处理的使用均导致漂白的纸浆的物理强度损失不明显。

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  • 来源
    《Journal of Wood Chemistry and Technology》 |2015年第6期|239-250|共12页
  • 作者

    Meng Qijun; Fu Shiyu; Li Bingyun; Lucia Lucian A.;

  • 作者单位

    S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China;

    S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China;

    Qilu Univ Technol, Key Lab Pulp & Paper Sci & Technol, Minist Educ, Jinan, Shandong, Peoples R China|N Carolina State Univ, Dept Forest Biomat, Raleigh, NC 27695 USA|N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hexenuronic acid (HexA); xylanase; hot acidic stage; eucalyptus kraft pulp;

    机译：己烯醛酸（HexA）;木聚糖酶;热酸性阶段;桉树牛皮纸浆;

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