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首页> 外文期刊>RSC Advances >A dispersed rutile-TiO2-supported Ni nanoparticle for enhanced gas production from catalytic hydrothermal gasification of glucose
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A dispersed rutile-TiO2-supported Ni nanoparticle for enhanced gas production from catalytic hydrothermal gasification of glucose

机译：用于增强葡萄糖的催化水热气化的气体产生的分散的润润-TiO2负载的Ni纳米粒子

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摘要

Hydrothermal gasification (HTG) is a promising technique for the utilization of wet biomass or organic wastes. This study reports a highly dispersed rutile-TiO2-supported Ni nanoparticle synthesized by a sol-gel method and its catalytic performance for gas production (H-2 and CH4) from HTG of glucose as a model compound of biomass. NiTiO3 formation of the gel precursor during the calcination process demonstrated the enhanced interaction of Ni and TiO2, and highly dispersive nickel crystallites were obtained after the reduction activation. Increase of the calcination temperature decreased the catalytic activity due to the sintering of nickel crystals. The supported Ni nanoparticle greatly promoted the carbon gasification efficiency of HTG of 10 wt% glucose (glucose : Ni = 1 : 0.11) from 27.1% to 68.7% at 400 degrees C and from 48.2% to 96.4% at 600 degrees C in supercritical water. A highly active temperature region (400-500 degrees C) of nickel catalyzed methanation reaction for CH4 formation was particularly confirmed. As the gasification was prolonged in supercritical water, the rutile-TiO2-supported Ni nanoparticle showed stable crystalline structures and part of the deposited carbon was gasified. The regenerated catalysts also showed significant activities.
机译：水热气化（HTG）是利用湿生物质或有机废物的有希望的技术。该研究报告了一种高度分散的润岩-TiO2支持的Ni纳米颗粒，其通过溶胶 - 凝胶法合成，其来自葡萄糖HTG的气体生产（H-2和CH 4）的催化性能作为生物质的模型化合物。在煅烧过程中，NitiO3在煅烧过程中形成凝胶前体，证明了Ni和TiO 2的增强相互作用，并且在还原活化后获得高度分散的镍微晶。由于镍晶体的烧结，煅烧温度的增加降低了催化活性。支持的Ni纳米粒子大大促进了10wt％葡萄糖（葡萄糖：Ni = 1：0.11）的HTG的碳气化效率在400℃下的27.1％至68.7％，在超临界水中以600℃的48.2％至96.4％。 。特别证实了对CH 4形成的镍催化甲烷化反应的高度活性温度区域（400-500℃）。随着气化在超临界水中延长，金刚石-TiO2负载的Ni纳米颗粒显示出稳定的晶体结构，并且将部分沉积的碳加气。再生催化剂也显示出显着的活性。

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  • 来源
    《RSC Advances》 |2015年第100期|共10页
  • 作者

    Li Sha; Zhu Chao; Guo Simao; Guo Liejin;

  • 作者单位

    Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Shaanxi Peoples R China;

    Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn Xian 710049 Shaanxi Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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