• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Science of the Total Environment >Tailoring acidity and porosity of alumina catalysts via transition metal doping for glucose conversion in bioreflnery
【24h】

Tailoring acidity and porosity of alumina catalysts via transition metal doping for glucose conversion in bioreflnery

机译：通过过渡金属掺杂调节氧化铝催化剂的酸度和孔隙度，以实现生物炼制厂中葡萄糖的转化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Efficient conversion of food waste to value-added products necessitates the development of high-performance heterogeneous catalysts. This study evaluated the use of A1_2O_3 as a low-cost and abundant support material for fabricating Lewis acid catalysts, i.e., through the in-situ doping of Cu, Ni, Co, and Zr into AI_2O_3 followed by calcination. The characterisation results show that all catalysts were mainly amorphous. In particular, adding the transition metals to the Al_2O_3 matrix resulted in the increase of acidity and meso-/micro-pores. The catalysts were evaluated in the conversion of glucose, which can be easily derived from starch-rich food waste (e.g., bread waste) via hydrolysis, to fructose in biorefinery. The results indicate that the Ni-doped A1_2O_3 (Al-Ni-C) achieved the highest fructose yield (19 mol%) and selectivity (59 mol%) under heating at 170 ℃ for 20 min, of which the performance falls into the range reported in literature. In contrast, the Zr-doped A1_2O_3 (Al-Zr-C) presented the lowest fructose selectivity despite the highest glucose conversion, meaning that the catalyst was relatively active towards the side reactions of glucose and intermediates. The porosity and acidity, modified via metal impregnation, were deduced as the determinants of the catalytic performance. It is noteworthy that the importance of these parameters may vary in a relative sense and the limiting factor could shift from one parameter to another. Therefore, evaluating physicochemical properties as a whole, instead of the unilateral improvement of a single parameter, is encouraged to leverage each functionality for cost-effectiveness. This study provides insights into the structure-performance relationships to promote advance in catalyst design serving a sustainable food waste biorefinery.
机译：将食物垃圾有效地转化为增值产品需要开发高性能的多相催化剂。这项研究评估了使用Al_2O_3作为低成本和丰富的载体材料来制备路易斯酸催化剂的方法，即通过将Cu，Ni，Co和Zr原位掺杂到AI_2O_3中然后进行煅烧来进行评估。表征结果表明，所有催化剂主要为非晶态。特别地，将过渡金属添加到Al_2O_3基体中导致酸度和中孔/微孔的增加。在生物精炼厂中，可以容易地将富含淀粉的食物废料（例如面包废料）经水解转化为果糖，将催化剂转化为果糖来评估催化剂。结果表明，掺Ni的Al_2O_3（Al-Ni-C）在170℃加热20min时，果糖得率最高（19 mol％），选择性最高（59 mol％）。文献报道。相比之下，尽管葡萄糖转化率最高，但掺Zr的Al_2O_3（Al-Zr-C）的果糖选择性最低，这意味着该催化剂对葡萄糖和中间体的副反应具有相对活性。通过金属浸渍改性的孔隙率和酸度被推导为催化性能的决定因素。值得注意的是，这些参数的重要性可能会在相对意义上有所不同，并且限制因素可能会从一个参数转移到另一个参数。因此，鼓励整体评估物理化学性质，而不是单方面改善单个参数，以利用每种功能来提高成本效益。这项研究提供了与结构-性能关系的见解，以促进催化剂设计的进步，从而为可持续的食物垃圾生物精炼厂提供服务。

著录项

  • 来源
    《The Science of the Total Environment》 |2020年第20期|135414.1-135414.7|共7页
  • 作者

    Iris K.M. Yu; Aamir Hanif; Daniel C.W. Tsang; Alex CK. Yip; Kun-Yi Andrew Lin; Bin Gao; Yong Sik Ok; Chi Sun Poon; Jin Shang;

  • 作者单位

    Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hung Horn Kowloon Hong Kong China Creen Chemistry Centre of Excellence Department of Chemistry. University of York York YO10 5DD UK;

    Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hung Horn Kowloon Hong Kong China City University of Hong Kong Shenzhen Research Institute 8 Yuexing 1st Road. Shenzhen Hi-Tech Industrial Park. Nanshan District. Shenzhen China School of Energy and Environment City University of Hong Kong. Tat Chee Avenue. Kowloon. Hong Kong China;

    Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hung Horn Kowloon Hong Kong China;

    School of Energy and Environment City University of Hong Kong. Tat Chee Avenue. Kowloon. Hong Kong China;

    Department of Environmental Engineering National Chung Hsing University Taichung Taiwan;

    Department of Agricultural and Biological Engineering University of Florida Gainesville FL 32611. United States;

    Korea Biochar Research Center O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering Korea University. Seoul 02841 Republic of Korea;

    City University of Hong Kong Shenzhen Research Institute 8 Yuexing 1st Road. Shenzhen Hi-Tech Industrial Park. Nanshan District. Shenzhen China School of Energy and Environment City University of Hong Kong. Tat Chee Avenue. Kowloon. Hong Kong China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biomass valorisation; Waste management/recycling; Sustainable biorefinery; Platform chemicals; Green catalysts; Glucose isomerisation;

    机译：生物量增值;废物管理/回收;可持续的生物精炼厂;平台化学品;绿色催化剂;葡萄糖异构化;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号