Abstract

Decomposition of ammonia over silica-supported cobalt catalysts for Fischer–Tropsch synthesis has been studied at a pressure of 0.1 MPa, a gas hourly space velocity in the range of 1000–6000 h^–1, and a temperature in the range of 400–650°C in a tubular fixed bed reactor in a flow-through mode. It was found that silica-supported cobalt catalysts for hydrocarbons synthesis via the Fischer–Tropsch protocol also exhibit high activity in ammonia decomposition. Both the activity and hydrogen performance decrease in the series: Co-Ru/SiO₂ > Co-Al₂O₃/SiO₂ > Ru/SiO₂ > Co-Al₂O₃/SiO₂(35%)/ZSM-5(30%)/Al₂O₃(35%). The relatively low values of effective activation energies estimated for all catalysts indicate that the reaction can proceed with high conversion at moderate temperatures.

中文翻译：

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钴基二氧化硅负载的费托合成催化剂上的氨分解

摘要

^{在 0.1 MPa 的压力、1000-6000 h - 1}的气时空速和 400-650 的温度范围内，研究了用于费-托合成的二氧化硅负载的钴催化剂上氨的分解°C 在管式固定床反应器中以流通模式。人们发现，用于通过 Fischer-Tropsch 协议合成碳氢化合物的二氧化硅负载的钴催化剂在氨分解中也表现出高活性。_{Co-Ru/SiO 2} > Co-Al ₂ O ₃ /SiO ₂ > Ru/SiO ₂ > Co-Al ₂ O ₃ /SiO ₂ (35%)/ZSM-5活性和氢性能均下降(30%)/铝₂ O ₃ (35%)。所有催化剂的有效活化能估计值相对较低，表明反应可以在中等温度下以高转化率进行。