An iron-based catalyst from bauxite residue (aka BR and red mud) was developed for removing biomass gasification tar. Its performance was investigated with naphthalene as the model tar compound. This was achieved by measuring the catalytic naphthalene conversion at five space velocities and at four temperatures in the 500°C to 800°C range, both in a N₂ environment and in 13 vol% H₂ with the balance N₂ for 14 hours to determine the long-term performance. The physical and chemical characteristics of the catalyst were studied prior to and after exposure to naphthalene to track the evolution of the catalyst as a result of the chemical reaction. In addition, the effects of calcination temperature and reduction with H₂ on the surface characteristics were investigated. The bauxite residue catalyst was shown to be significantly active for naphthalene cracking, with its activity comparable to that of an industrial Ni catalyst. Activity measurements over 14 hours of testing showed that the catalyst activity decreased from 98% to 65% naphthalene conversion with time as a result of catalyst deactivation when tested in a N₂ reaction environment. In the presence of 13 vol% H₂; however, the activity maintained >95% conversion for the entire duration of the experiment.

中文翻译：

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铝土矿渣作为铁基催化剂催化裂化萘，一种气化焦油的模型化合物

开发了一种来自铝土矿残渣（又名 BR 和赤泥）的铁基催化剂，用于去除生物质气化焦油。以萘为模型焦油化合物对其性能进行了研究。这是通过在 N ₂环境和 13 vol% H ₂和余量 N _{2 的}5 个空间速度和 500°C 至 800°C 范围内的四个温度下测量催化萘转化率来实现的。决定长期业绩。在暴露于萘之前和之后研究了催化剂的物理和化学特性，以跟踪由于化学反应而导致的催化剂的演变。此外，煅烧温度和H ₂还原的影响对表面特性进行了研究。铝土矿渣油催化剂对萘裂解具有显着的活性，其活性可与工业镍催化剂相媲美。超过 14 小时测试的活性测量表明，在 N ₂反应环境中测试时，由于催化剂失活，催化剂活性随时间从 98% 降低到 65% 萘转化率。存在 13 vol% H _{2 时}；然而，该活动在整个实验期间保持了 >95% 的转化率。