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a stable and active nickelkatalysator for kohlendioxydreformierung of methane to synthesis gas

机译:一种稳定,活跃的镍分解催化剂,用于甲烷甲烷二甲酰重整反应生成合成气

摘要

This invention refers to a novel nickel-based catalyst which exhibits excellent activity and stability for carbon dioxide reforming of natural gas (methane) to synthesis gas. The catalyst consists of nickel crystallites in contact with La2O3 carrier or in the form of nickel supported on La2O3 carrier or in the form of nickel on La2O3 particles dispersed on a conventional carrier such as gamma -Al2O3. The stable and active surface of Ni/La2O3 is formed, following two hours of the reaction of carbon dioxide reforming of methane at temperatures higher than 600 DEG C. In contrast to conventional nickel-based catalysts, e.g. Ni/ gamma -Al2O3, the new Ni/La2O3 catalysts (at the stable state) are not prone to coking in the temperature range of 550-850 DEG C, exhibiting excellent stability. Near complete conversion of methane and carbon dioxide, and around 100% selectivity to carbon monoxide and hydrogen are achieved over the Ni/La2O3 catalysts under stoichiometric conditions at temperatures in the neighbourhood of 8oo DEG C and a superficial contact time of ca. 0.02 seconds. MATH
机译:本发明涉及一种新型的镍基催化剂,该催化剂对天然气(甲烷)的二氧化碳重整为合成气具有优异的活性和稳定性。该催化剂由与La 2 O 3载体接触的镍微晶组成,或以负载在La 2 O 3载体上的镍形式或分散在常规载体如γ-Al2 O 3上的La 2 O 3颗粒上的镍形式存在。 Ni / La2O3的稳定和活性表面是在高于600℃的温度下进行二氧化碳二氧化碳重整甲烷两小时后形成的。与常规的镍基催化剂相比,例如Ni / La2O3。 Ni /γ-Al2O3是新型的Ni / La2O3催化剂(处于稳定状态)在550-850℃的温度范围内不容易结焦,具有出色的稳定性。在化学计量的条件下,在大约8℃的温度和大约60℃的表面接触时间下,在Ni / La2O3催化剂上,甲烷和二氧化碳几乎完全转化,并且对一氧化碳和氢气的选择性约为100%。 0.02秒

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