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Light olefin production on the Co-Ni catalyst: Calcination conditions, and modeling and optimization of the process conditions by a statistical method

Arsalanfar, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1039/c9nj04404c
  3. Publisher: Royal Society of Chemistry , 2020
  4. Abstract:
  5. The present work is comprised of two main parts. In part 1 the Co-Ni/γ-Al2O3 catalyst was prepared using a sol-gel procedure. Then the effect of calcination variables including the calcination temperature and time on the catalytic performance for production of light olefins was investigated and optimized. The obtained results have shown that the catalyst which was calcined at 550 °C for 6 h has revealed the better catalytic performance for production of light olefins. In part 2 the effect of process conditions including the reaction temperature, H2/CO feed ratio and total reaction pressure on the catalytic performance (CO conversion%, (C2-C4) selectivity% and C5+ selectivity%) was investigated. Experiments were performed under a wide range of operational conditions including a reaction temperature of 473-673 K, pressure of 1-10 bar and H2/CO ratio of 1-4. The optimization and modeling were performed using response surface methodology (RSM). For each response a quadratic polynomial was successfully fitted to the experimental data. In this study, the models, the impressive parameters of the models and the parameter interaction were investigated. The physicochemical properties of the catalysts were investigated using XRD, BET, SEM, TGA, DSC, TPR, TPD and VSM. © 2020 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique
  6. Keywords:
  7. Binary alloys ; Calcination ; Catalysts ; Cobalt alloys ; Physicochemical properties ; Sol-gels ; Calcination conditions ; Calcination temperature ; Catalytic performance ; Light olefin productions ; Modeling and optimization ; Operational conditions ; Parameter interactions ; Response surface methodology ; Light olefins ; Alkene derivative ; Aluminum oxide ; Carbon monoxide ; Cobalt ; Hydrogen ; Nickel ; Analysis of variance ; Analytic method ; Article ; BET analysis ; Calcination time ; Catalyst ; Chemical interaction ; Differential scanning calorimetry ; High temperature procedures ; Light ; Physical chemistry ; Pore size ; pore volume ; pressure and tension ; priority journal ; process optimization ; Reaction duration (chemistry) ; Reaction pressure ; Reaction temperature ; Response surface method ; Scanning electron microscopy ; Sol-gel ; Surface area ; Synthesis ; temperature programmed desorption ; Temperature programmed reduction ; Thermogravimetry ; Vibrating sample magnetometry ; X ray diffraction
  8. Source: New Journal of Chemistry ; Volume 44, Issue 18 , 2020 , Pages 7467-7483
  9. URL: https://pubs.rsc.org/en/content/articlelanding/2020/nj/c9nj04404c#!divAbstract