Effect of Pretreatment on Physicochemical Properties and Performance of Multiwalled Carbon Nanotube Supported Cobalt Catalyst for Fischer–Tropsch Synthesis

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• 作者：Vahid Vosoughi ; Sandeep Badoga ; Ajay K. Dalai ; Nicolas Abatzoglou
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：June 1, 2016
• 年：2016
• 卷：55
• 期：21
• 页码：6049-6059
• 全文大小：621K
• 年卷期：0
• ISSN：1520-5045

文摘

The influence of different nitric acid concentrations (35, 50, 70 wt %) on the physicochemical properties of multiwalled carbon nanotube was investigated. 15 wt % cobalt was impregnated on acid treated nanotubes. The corresponding catalysts were characterized by BET, XRD, Raman, SEM, TEM, TPR, CO chemisorption techniques to further study the impact of acid functionalization on textual properties, metal dispersion, crystallite size, defect generation, and reducibility of 15Co/CNT catalysts. The performance of prepared catalysts was tested for 30% CO and 60% H₂ with balanced Ar in a fixed bed microreactor for Fischer–Tropsch synthesis at 220 °C, 2 MPa, and GHSV of 3000 cm³·g^–1·h^–1. Pretreatment of CNTs with 70 wt % nitric acid exhibited improved physicochemical properties of 15Co/CNT catalyst and hydrocarbon yield by 35% as compared to untreated CNT supported catalyst.