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CO2-Free Hydrogen Production by Catalytic Pyrolysis of Hydrocarbon Feedstocks in Molten Ni–Bi
Energy & Fuels ( IF 5.3 ) Pub Date : 2020-11-25 , DOI: 10.1021/acs.energyfuels.0c03080 Clarke Palmer 1 , Elaine Bunyan 1 , John Gelinas 1 , Michael J. Gordon 1 , Horia Metiu 2 , Eric W. McFarland 1
Energy & Fuels ( IF 5.3 ) Pub Date : 2020-11-25 , DOI: 10.1021/acs.energyfuels.0c03080 Clarke Palmer 1 , Elaine Bunyan 1 , John Gelinas 1 , Michael J. Gordon 1 , Horia Metiu 2 , Eric W. McFarland 1
Affiliation
The catalytic decomposition of methane, propane, benzene, and crude petroleum was investigated between 900 and 1000 °C in molten metal bubble column reactors. The conversion to gas phase products and solid carbon was measured after introducing the gas phase reactants into a bubble column reactor containing a catalytic molten mixture of 27 mol % Ni and 73 mol % Bi. The conversions of propane, benzene, and crude oil are 100% at temperatures >950 °C at a reactor residence time of ∼1 s. Equilibrium selectivity of 100% H2 and carbon was not achieved in the short residence time, but can be achieved at longer residence times. The solid carbon products obtained from methane pyrolysis were more graphitic than those produced from the other, higher-molecular weight reactants; the latter were more amorphous, as measured by Raman spectroscopy and electron microscopy and resembled carbon black. A model is proposed for carbon formation in bubble column reactors, in which amorphous carbon products are derived from the gas-phase decomposition and graphitic carbon products are formed from dissolution and reprecipitation of carbon into and out of the molten metal.
中文翻译:
Ni-Bi熔融态中碳氢化合物原料催化热解生产无CO 2氢
在熔融金属鼓泡塔反应器中,研究了甲烷,丙烷,苯和原油在900至1000°C之间的催化分解。在将气相反应物引入包含27mol%的Ni和73mol%的Bi的催化熔融混合物的鼓泡塔反应器中之后,测量到气相产物和固体碳的转化率。丙烷,苯和原油的转化率在> 950°C且反应器停留时间约为1 s时为100%。100%H 2的平衡选择性碳不能在短停留时间内实现,但是可以在更长的停留时间内实现。甲烷热解制得的固体碳产物比其他更高分子量的反应物产生的石墨更具石墨性。通过拉曼光谱和电子显微镜测得,后者更无定形,类似于炭黑。提出了一种用于鼓泡塔反应器中碳形成的模型,其中,非晶态碳产物是由气相分解得到的,而石墨碳产物是由碳在熔融金属中的溶解和再沉淀而形成的。
更新日期:2020-12-17
中文翻译:
Ni-Bi熔融态中碳氢化合物原料催化热解生产无CO 2氢
在熔融金属鼓泡塔反应器中,研究了甲烷,丙烷,苯和原油在900至1000°C之间的催化分解。在将气相反应物引入包含27mol%的Ni和73mol%的Bi的催化熔融混合物的鼓泡塔反应器中之后,测量到气相产物和固体碳的转化率。丙烷,苯和原油的转化率在> 950°C且反应器停留时间约为1 s时为100%。100%H 2的平衡选择性碳不能在短停留时间内实现,但是可以在更长的停留时间内实现。甲烷热解制得的固体碳产物比其他更高分子量的反应物产生的石墨更具石墨性。通过拉曼光谱和电子显微镜测得,后者更无定形,类似于炭黑。提出了一种用于鼓泡塔反应器中碳形成的模型,其中,非晶态碳产物是由气相分解得到的,而石墨碳产物是由碳在熔融金属中的溶解和再沉淀而形成的。