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Methane conversion with carbon dioxide in plasma-catalytic system

机译：等离子催化系统中二氧化碳的甲烷转化

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摘要

The hybrid plasma-catalytic system (HPCS) was used for the conversion of methane with CO_2 to higher hydrocarbons and alcohols. The investigation was carried out at the pressure of 1.2 bar. A dielectric barrier discharge (DBD) reactor was powered at the frequency of about 6 kHz. Molar ratio [CO_2] :[CH_4] in the inlet gas mixtures (CH_4 + CO_2 + Ar) was 1. The investigation was carried out for specific energy 1000-3500 kJ/mol CH_4. Three kinds of packing were tested: Fe/Al_2O_3, NaY and Na-ZSM-5. Ethane was the main component among the organic products. In the HPCS with Na-ZSM-5, in the first hour the formation of liquid products was observed. In HPOS with Na-ZSM-5 catalyst the amount of hydrocarbons, containing more than 4 carbon atoms was the highest. The overall methane conversion in HPCS with Na-ZSM-5 was 47.5% and 65% and the methane conversion to C2-C4 hydrocarbons reached 19.5% and 14.5% for gas flow rate 2 and 1 Nl/h respectively. The highest share of hydrogen in H_2 and C2-4 hydrocarbons was obtained in a homogeneous system. It was 75-92%. The highest methane conversion to alcohols (methanol and ethanol) was obtained in the homogeneous system and with Al_2O_3 it was 4.4% and 2.5% respectively. The increase of the residence time of gas in the reaction zone decreases the conversion of methane to methanol and ethanol in homogenous and with Al_2O_3. The temperature did not affect the overall methane and CO_2 and conversion of methane to C2-C4 hydrocarbons in HPCS with Fe/Al_2O_3 and NaY. With Na-ZSM-5 conversion of methane to C3 and C4 at 340 ℃ was 3 and 5 times higher than that at 130 ℃ respectively.
机译：混合等离子体催化系统（HPCS）用于将甲烷与CO_2转化为高级烃和醇。研究在1.2 bar的压力下进行。介电势垒放电（DBD）反应器以大约6 kHz的频率供电。进气混合物（CH_4 + CO_2 + Ar）中的摩尔比[CO_2]：[CH_4]为1。对比能量1000-3500 kJ / mol CH_4进行了研究。测试了三种填料：Fe / Al_2O_3，NaY和Na-ZSM-5。乙烷是有机产品中的主要成分。在带有Na-ZSM-5的HPCS中，在第一个小时内观察到液体产物的形成。在使用Na-ZSM-5催化剂的HPOS中，碳原子数最高的是碳氢化合物，其中碳原子数超过4。在具有Na-ZSM-5的HPCS中，在气体流速2和1Nl / h下，甲烷的总甲烷转化率分别为47.5％和65％，甲烷向C 2 -C 4烃的甲烷转化率分别达到19.5％和14.5％。在均相系统中获得了H_2和C2-4烃中氢的最高份额。为75-92％。在均相系统中，甲烷转化为醇类（甲醇和乙醇）的最高，而Al_2O_3分别为4.4％和2.5％。气体在反应区中的停留时间的增加降低了在均相中和与Al_2O_3的甲烷向甲醇和乙醇的转化。温度不影响在含Fe / Al_2O_3和NaY的HPCS中甲烷的整体甲烷和CO_2以及甲烷向C2-C4烃的转化。用Na-ZSM-5催化，甲烷在340℃转化为C3和C4分别是130℃的3倍和5倍。

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  • 来源
    《Fuel》 |2014年第ptaa期|608-617|共10页
  • 作者

    K. Krawczyk; M. Mlotek; B. Ulejczyk; K. Schmidt-Szalowski;

  • 作者单位

    Faculty of Chemistry, Warsaw University of Technology. Noakowskiego 3, 00-664 Warszawa, Poland;

    Faculty of Chemistry, Warsaw University of Technology. Noakowskiego 3, 00-664 Warszawa, Poland;

    Faculty of Chemistry, Warsaw University of Technology. Noakowskiego 3, 00-664 Warszawa, Poland;

    Faculty of Chemistry, Warsaw University of Technology. Noakowskiego 3, 00-664 Warszawa, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Methane; Carbon dioxide; Non-thermal plasma; Plasma-catalytic system;

    机译：甲烷二氧化碳;非热等离子体;等离子体催化系统;

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