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Synthesis, characterization and activity performance of nickel-loaded spent FCC catalyst for pine gum hydrogenation

机译：镍氢化镍废FCC催化剂的合成，表征及活性性能

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摘要

A Ni-based catalyst supported over a spent fluid catalytic cracking (FCC) catalyst was prepared by a wet impregnation method. The catalytic characteristic was investigated in pine gum hydrogenation. Optimum conditions for catalyst preparation were obtained as: 15% Ni loading, 723 K calcination temperature, and 723 K reduction temperature for 2.5 h. The characterization results indicate that the specific surface area of the spent catalyst increased from 65.70 m(2) g(-1) to 67.78 m(2) g(-1) after calcination. The H-2-TPR profile of the spent FCC catalyst exhibited two reduction peaks at 1123 degrees C and 670 degrees C. The TG curves showed that the second and third steps occur at 440 K and 550 K, respectively, having a total weight loss of 16%. The NiO grains possess rhombus particles on the surface or between the layers of the supported NiO catalyst. After activation in H-2 flow, the metallic Ni loads on the support with no covalent bond between them. The NH3-TPD results indicated that the spent FCC catalyst held an obvious distribution of weakly acidic sites, and the acid sites became stronger after loading the catalyst with Ni. The hydrogenation products of pine gum were identified by GC-MS and a reaction mechanism was proposed. This study demonstrated its cost-effectiveness, environment-friendly nature and that the utilization of a spent FCC catalyst can be effectively applied as an alternative approach to pine gum hydrogenation on an industrial level.
机译：通过湿浸渍方法制备在废液催化裂化（FCC）催化剂上负载的基于Ni的催化剂。在松胶氢化中研究了催化特性。获得最佳催化剂制剂条件为：15％Ni负荷，723k煅烧温度，723k还原温度为2.5小时。表征结果表明，在煅烧后，所花催化剂的比表面积从65.70m（2）克（-1）至67.78m（2 )g（2 )g（2 )g（-1）增加。废FCC催化剂的H-2-TPR曲线在1123℃和670℃下表现出两种还原峰。Tg曲线显示，第二和第三步骤分别发生在440k和550k，具有总重量损失16％。 NIO晶粒在表面或支撑的NIO催化剂的层之间具有菱形颗粒。在H-2流动中激活后，金属Ni在支撑件上载有没有共价键。 NH3-TPD结果表明，废FCC催化剂的弱酸位点明显分布，用Ni加载催化剂后，酸部位变得更强。通过GC-MS鉴定了松胶的氢化产物，并提出了反应机理。本研究证明了其成本效益，环保性质，并且可以有效地应用于花FCC催化剂的利用作为在工业水平上的替代方法。

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  • 来源
    《RSC Advances》 |2019年第12期|共11页
  • 作者

    Chen Xiaopeng; Ren Lu; Yaseen Muhammad; Wang Linlin; Liang Jiezhen; Liang Ruixue; Chen Xiankun; Guo Huiqing;

  • 作者单位

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

    Guangxi Univ Sch Chem &

    Chem Engn Guangxi Key Lab Petrochem Resources Proc &

    Proc I Nanning 53004 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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