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| Oxygen Delignification of Loblolly Pine Pulps Using Sodium Carbonate as Alkaline Medium to Promote Its Enzymatic Hydrolysis |
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| DOI：10.11981/j.issn.1000-6842.2018.01.1 |
| Key Words:pretreatment; oxygen delignification; enzymatic hydrolysis; bioethanol; sodium carbonate |
| Fund Project:国家自然科学基金（No. 31470593）；江苏高校优势学科建设工程资助项目。 |
| Author Name | Affiliation | | 张雨情1 | 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室，江苏南京，210037 | | 吴淑芳1，* | 1. 南京林业大学江苏省制浆造纸科学与技术重点实验室，江苏南京，210037 | | Hasan Jameel2 | 2.北卡州立大学林业生物材料系，美国罗利，27695 | | Houmin Chang2 | 2.北卡州立大学林业生物材料系，美国罗利，27695 |
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| Abstract: |
| Loblolly pine were prepared by kraft process (KP) and green liquor process (GL), and the pulps were respectively carried out oxygen delignification with sodium carbonate as alkaline medium (marked as KP-OC and GL-OC), the chemical compositions of the resultant pulps were analyzed and the pulp were conducted enzymatic hydrolysis. The results indicated that the ratios of delignification of the pulps obtained through oxygen delignification at 120℃ for 4 h using sodium carbonate as alkaline medium were much higher than that of the pulp obtained through oxygen delignification at the similar conditions for 1 h using sodium hydroxide as alkaline medium. When the enzyme dosage was 10 FPU/g, the monoce yield and monoce recovery of enzymatic hydrolysis of GL-OC were 73.2% and 72.4%, respectively. Accordingly,those of KP-OC were 95.8% and 75.7%, respectively. The enzymatic hydrolysis efficiency of the pulp oxygen delignified with sodium carbonate was much better than that with sodium hydroxide. |
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