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首页> 外文期刊>Energy & fuels >Study on the Oligomerization of Ethylene in Fluidized Catalytic Cracking (FCC) Dry Gas over Metal-Loaded HZSM-5 Catalysts
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Study on the Oligomerization of Ethylene in Fluidized Catalytic Cracking (FCC) Dry Gas over Metal-Loaded HZSM-5 Catalysts

机译：金属负载的HZSM-5催化剂在流化催化裂化（FCC）干气中乙烯低聚的研究

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摘要

Oligomerization of ethylene in fluidized catalytic cracking (FCC) dry gas was investigated as a feasible route for the use of FCC dry gas. A series of metal-loaded HZSM-5 (MZSM-5) catalysts were prepared by the impregnation method. It was characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and N_2 adsorption that the metal introduction did not change the structure of the HZSM-5 catalyst but had an influence on acidic properties, i.e., decreasing Bronsted acid sites and forming Lewis acid sites together with the blocking of channels. The catalytic performances of MZSM-5 catalysts for the oligmerization of ethylene in FCC dry gas were studied in a fixed-bed reactor. It was observed that the addition of metal to fresh HZSM-5 enhanced the olefin yield. Among all catalysts studied, MgZSM-5 exhibited the highest propylene and total olefin yields of 12.21 and 17.28%, respectively. Higher olefin yields were obtained over the steam-treated HZSM-5 catalyst when adding moderate N_2 as a diluent gas. The catalytic performance of the steam-treated HZSM-5 catalyst was also investigated in a fluidized-bed reactor, and similar product distribution could be obtained in comparison to that in a fixed-bed reactor. The conversion of ethylene could reach 47.22% at 500 ℃ with a propylene yield of 14.32%.
机译：研究了乙烯在流化催化裂化（FCC）干气中的低聚反应，这是使用FCC干气的可行途径。通过浸渍法制备了一系列负载金属的HZSM-5（MZSM-5）催化剂。 X射线衍射（XRD），傅立叶变换红外（FTIR）光谱和N_2吸附的特征是，引入的金属不会改变HZSM-5催化剂的结构，但会影响酸性，即降低布朗斯台德酸位和形成路易斯酸位以及通道的阻塞。在固定床反应器中研究了MZSM-5催化剂在FCC干气中乙烯低聚的催化性能。观察到向新鲜的HZSM-5中添加金属可提高烯烃的收率。在所有研究的催化剂中，MgZSM-5的丙烯和总烯烃收率最高，分别为12.21％和17.28％。当添加适度的N_2作为稀释气体时，在经过蒸汽处理的HZSM-5催化剂上可获得更高的烯烃收率。在流化床反应器中还研究了蒸汽处理过的HZSM-5催化剂的催化性能，与固定床反应器相比，可以获得相似的产物分布。 500℃条件下，乙烯的转化率可达到47.22％，丙烯收率为14.32％。

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  • 来源
    《Energy & fuels》 |2010年第julaaauga期|p.3760-3763|共4页
  • 作者

    Xue Ding; Chunyi Li; Chaohe Yang;

  • 作者单位

    Stale Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266555, Shandong, China;

    Stale Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266555, Shandong, China;

    Stale Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266555, Shandong, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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