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In situ preparation of K_2CO_3 supported Kraft lignin activated carbon as solid base catalyst for biodiesel production

机译:原位制备K_2CO_3负载的硫酸盐木质素活性炭作为生物柴油生产的固体基础催化剂

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摘要

In this study, the catalysts K_2CO_3 supported Kraft lignin activated carbon (K_2CO_3/KLC) were prepared in situ by simply mixing K_2CO_3 with technical Kraft lignin (KL) and subsequently activating at 800 ℃ for 2 h under N_2 flow. The precursor and catalysts were characterized by thermal gravity analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spec-troscopy (XPS), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface area. The catalytic performance of prepared catalysts was evaluated by transesterification of rapeseed oil with methanol. The effects of various parameters on biodiesel yield were investigated. The biodiesel yield of 99.6% was achieved by using the catalyst prepared by 0.6 of K_2CO_3/KL mass ratio and activation at 800 ℃, under the transesterification condition of 65 ℃, 2 h, methanol to rapeseed oil molar ratio of 15:1 and 3.0 wt.% catalyst (relative to the weight of rapeseed oil). The solid catalyst can be reused for 4 times and biodiesel yield remained over 82.1% for the fourth time.
机译:在这项研究中,通过简单地将K_2CO_3与工业硫酸盐木质素(KL)混合,然后在N_2流下于800℃活化2 h,就地制备了催化剂K_2CO_3负载的硫酸盐木质素活性炭(K_2CO_3 / KLC)。通过热重分析(TGA),傅立叶变换红外(FTIR)光谱,X射线衍射(XRD),X射线光电子能谱(XPS),扫描电子显微镜(SEM)和Brunauer- Emmett-Teller(BET)表面积。通过菜籽油与甲醇的酯交换反应评估了制备的催化剂的催化性能。研究了各种参数对生物柴油产量的影响。在65℃酯交换反应2h,甲醇与菜籽油摩尔比为15:1和3.0的条件下,通过以0.6的K_2CO_3 / KL质量比和800℃活化制备的催化剂,生物柴油收率达到99.6%。 wt。%催化剂(相对于菜籽油的重量)。固体催化剂可重复使用4次,生物柴油产率第四次保持在82.1%以上。

著录项

  • 来源
    《Fuel》 |2013年第11期|435-442|共8页
  • 作者单位

    Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China Engineering Research Center of Biomass Materials, Southwest University of Science and Technology, Ministry of Education, Mianyang 621010, China;

    Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;

    Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;

    Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;

    Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;

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

    Biodiesel; Kraft lignin; Solid base catalyst; Transesterification; K_2CO_3;

    机译:生物柴油卡夫木质素;固体碱催化剂;酯交换;K_2CO_3;

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