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生物质化学工程 ›› 2016, Vol. 50 ›› Issue (6): 23-31.doi: 10.3969/j.issn.1673-5854.2016.06.004

• 研究报告 • 上一篇    下一篇

固体酸催化淀粉一锅法制备果葡糖浆的研究

陈晖晖, 蒋叶涛, 孙勇, 林鹿   

  1. 厦门大学 能源学院, 福建 厦门 361102
  • 收稿日期:2016-03-24 出版日期:2016-11-30 发布日期:2016-12-03
  • 通讯作者: 孙勇(1979-),副教授,博士,从事生物炼制和生物能源化学的研究;E-mail:sunyong@xmu.edu.cn E-mail:sunyong@xmu.edu.cn
  • 作者简介:陈晖晖(1988-),女,福建福鼎人,硕士生,从事生物质化学转化的研究;E-mail:864271545@qq.com
  • 基金资助:
    福建省自然科学基金(2016J01077);厦门大学校长基金(20720160087)

One-pot Preparation of High Fructose Syrup Directly from Starch over Solid Acid Catalyst

CHEN Hui-hui, JIANG Ye-tao, SUN Yong, LIN Lu   

  1. College of Energy, Xiamen University, Xiamen 361102, China
  • Received:2016-03-24 Online:2016-11-30 Published:2016-12-03

摘要: 研究了几种负载型固体酸催化剂催化淀粉转化为果葡糖浆的催化效果,其中,超稳Y型分子筛(USY)负载硫酸制备得到的SO42-/USY可以作为双功能催化剂,既催化淀粉水解为葡萄糖,又使葡萄糖异构为果糖,实现了淀粉一锅法制备果葡糖浆的工艺途径,具有良好的催化效果。对催化剂的制备条件进行优化,发现较佳的制备条件为1.5 mol/L H2SO4和550℃的焙烧温度。以此为催化剂对反应条件进行优化,获得较佳的反应条件是5%淀粉(淀粉/水)、催化剂用量为淀粉质量的30%、反应温度为150℃、反应时间为1 h、转速400 r/min,得到的果葡糖浆得率为86.18%,含58.34%的葡萄糖和27.84%的果糖。对催化剂进行物理吸附表征,发现USY具有较高的比表面积和孔隙度,通过浸渍焙烧过程能有效使硫酸通过键合作用吸附在USY表面上。对催化剂进行NH3程序升温脱附和元素分析表征发现,催化剂的重复使用活性降低与含碳有机质沉积和催化活性中心的SO42-流失有关。通过简单的焙烧(除去表面积碳)和硫酸中浸渍活化(增加SO42-)的催化剂再生方法,可以有效地恢复SO42-/USY的催化活性。

关键词: 淀粉, 果葡糖浆, 固体酸, SO42-/USY, 水解, 异构

Abstract: The catalytic effects of several supported solid acid catalysts on the direct conversion of starch into high fructose syrup (HFS) in water were studied.Among them, the SO42-/USY solid catalyst,which was prepared by loading sulfuric acid on ultrastable Y zeolite (USY),possessed bifunctional activities for both hydrolysis of starch and isomerization of glucose.It made one-step preparation of HFS from starch into reality and had a good catalytic effect.The preparation conditions of SO42-/USY were optimized.The optimal conditions were 1.5 mol/L H2SO4 and 550℃.An optimized HFS yield(86.18%),containing 58.34% glucose and 27.84% fructose(mass fraction),was obtained under the conditions of 5% starch(starch/water),30% catalyst(based on the mass of starch),150℃,1 h and 400 r/min on the catalyst of optimal SO42-/USY.The USY catalyst had high specific surface area and porosity characterized by physical adsorption technique.This enabled the sulfuric acid to be effectively adsorbed on the USY surface by impregnation and calcination.Meanwhile,the catalysts were characterized by NH3 temperature programmed desorption and elemental analysis to find that the decrease of catalytic activity resulted from carbon deposition on the catalysts and the loss of SO42-.Therefore, the catalytic activity of SO42-/USY could be effectively recovered by calcining (removal carbon on the surface of catalyst) and impregnating in sulfuric acid (increase SO42-).

Key words: starch, high fructose syrup, solid acid, SO42-/USY, hydrolysis, isomerization

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