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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >Partial oxidation of methane to syngas with or without simultaneous steam or CO2 reforming over a high-temperature stable-NiCoMgCeOx supported on zirconia-hafnia catalyst
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Partial oxidation of methane to syngas with or without simultaneous steam or CO2 reforming over a high-temperature stable-NiCoMgCeOx supported on zirconia-hafnia catalyst

机译：在氧化锆-氧化f催化剂上负载的高温稳定NiCoMgCeOx上，在有或没有同时进行蒸汽或CO2重整的情况下，甲烷部分氧化为合成气

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摘要

A NiCoMgCeOx (Ni/Co/Mg/Ce: 1:0.2:1.2:1.2)/zirconia-hafnia catalyst with unusually high thermal stability has been investigated for syngas generation via a process that includes the catalytic partial oxidation of methane (CPOM), the oxidative steam reforming of methane (OSRM) and the oxidative CO2 reforming of methane (OCRM). The catalyst calcined at 1400 degrees C (for 4 h) showed excellent activity/selectivity for the CPOM, OSRM and the OCRM reactions; furthermore no catalyst deactivation was observed for a period of 20 h. For the CPOM process, the selectivity for H-2 was > 95% at reaction temperatures > 650 degrees C however temperatures above 800 degrees C were required to achieve > 95% CO selectivity. While the reaction temperature had a considerable influence on the CPOM product H-2/CO ratio, the space velocity (at 850 degrees C) did not affect it to any significant extent. For the OSRM process, the H2O/CH4 ratio and the reaction temperature had a strong effect on the product H-2/CO ratio and the heat of the reaction; depending on the H2O/CH4 ratio and reaction temperature, the OSRM process could be operated in a mildly exothermic, thermoneutral or mildly endothermic mode. The CO2 conversion was very strongly affected by the reaction temperature in the OCRM process; reasonably high CO2 conversion ( > 40%) could only be obtained at high OCRM reaction temperatures ( > 850 degrees C). The exothermicity of the OCRM reaction was found to decrease with increasing reaction temperature. (c) 2006 Elsevier B.V. All rights reserved.
机译：研究了一种具有异常高的热稳定性的NiCoMgCeOx（Ni / Co / Mg / Ce：1：0.2：1.2：1.2）/氧化锆-氧化for催化剂，用于合成气的产生，该工艺包括甲烷的催化部分氧化（CPOM），甲烷的氧化蒸汽重整（OSRM）和甲烷的氧化CO2重整（OCRM）。在1400摄氏度（4小时）下煅烧的催化剂对CPOM，OSRM和OCRM反应显示出优异的活性/选择性。此外，在20小时内未观察到催化剂失活。对于CPOM工艺，在反应温度> 650摄氏度时，对H-2的选择性为> 95％，但是需要高于800摄氏度的温度才能实现> 95％的CO选择性。尽管反应温度对CPOM产物H-2 / CO之比有相当大的影响，但空速（在850℃下）对它的影响不大。对于OSRM工艺，H2O / CH4比和反应温度对产物H-2 / CO比和反应热有很强的影响。取决于H2O / CH4的比例和反应温度，OSRM过程可以在轻度放热，热中性或轻度吸热模式下运行。在OCRM过程中，反应温度非常强烈地影响了CO2转化率。只有在较高的OCRM反应温度（> 850摄氏度）下才能获得相当高的CO2转化率（> 40％）。发现OCRM反应的放热随着反应温度的升高而降低。 （c）2006 Elsevier B.V.保留所有权利。

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