The present study investigates the oxidative de-hydrogenation of propane-butane (C3-C4) fraction over mono (Cr, Mo) and bi-metal (Cr-Mo) loaded MCM–41catalysts. The catalysts were prepared by sequential impregnation method at 500oC calcination temperature. Experiments were performed by feeding C3-C4 fraction and CO2 into a continuous flow quartz reactor at atmospheric pressure (P = 1 atm.), reaction temperatures between 500 – 650oC, gas hourly space velocity within 100 – 400 h-1, and at reaction time (tr) = 2h. The physicochemical properties and performance of catalysts were evaluated by BET, XRD, H2–TPR, and NH3–TPD characterization techniques. The major products are ethylene, propylene, isobutylene, butylene. This paper reports that the total yield of olefins (Ʃ C2-C4) = 71.6 % was achieved at 89.5 % conversion level of C3–C4 at 630oC. The results indicate that the addition of Mo to Cr/MCM–41 modifies its catalytic activity. The Cr/MCM–41 and Mo/MCM–41 catalysts were prepared for comparison purposes.
Inhaltsverzeichnis (Table of Contents)
- Introduction
- Experimental
- Materials and Methods
- Catalysts Preparation
- Catalysts Treatment
- Catalysts Test
- Oxidative De-hydrogenation of C3—C4
- Results and Discussion
- Catalysts Characterization
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This study investigates the oxidative de-hydrogenation (ODH) of propane-butane (C3-C4) fraction over mono (Cr, Mo) and bi-metal (Cr-Mo) loaded MCM-41 catalysts. The research aims to evaluate the catalytic activity, selectivity, and yield of olefins (C2-C4) produced through this process. The study explores the impact of different metal loadings on catalyst performance and examines the effectiveness of using carbon dioxide as a mild oxidant to enhance the ODH reaction.
- Oxidative De-hydrogenation of C3-C4 fraction
- Catalytic Activity and Selectivity of Cr, Mo, and Cr-Mo loaded MCM-41 catalysts
- Influence of Metal Loadings on Catalyst Performance
- Role of Carbon Dioxide as a Mild Oxidant in ODH
- Optimization of Reaction Parameters for Olefin Production
Zusammenfassung der Kapitel (Chapter Summaries)
The Introduction provides context for the study, highlighting the importance of olefin production in the chemical industry and the challenges associated with conventional production methods. It introduces the concept of oxidative de-hydrogenation using carbon dioxide as a mild oxidant and outlines the potential benefits of this approach. The Experimental section details the materials, methods, and characterization techniques employed in the research. It covers catalyst preparation, treatment, and testing procedures, including the experimental setup for the ODH reaction. The Results and Discussion section presents the findings of the study, focusing on the physicochemical properties of the catalysts and their catalytic performance in the ODH reaction. This section also includes an analysis of the influence of metal loadings and reaction parameters on olefin production.
Schlüsselwörter (Keywords)
Oxidative de-hydrogenation (ODH), C3-C4 fraction, olefin production, catalyst activity, selectivity, yield, Cr-Mo/MCM-41, carbon dioxide, mild oxidant, reaction parameters.
- Quote paper
- A. A. Ijagbuji (Author), V. V. Schwarzkopf (Author), I. I. Zakharov (Author), D. B. Woods (Author), T. C. Philips (Author), K. M. Jackson (Author), M. B. Saltzberg (Author), B.V. Shevchenko (Author), J. K. Johnson (Author), 2015, Production of olefins via oxidative de-hydrogenation of C3‒C4 fraction by CO2 over Cr‒Mo/MCM‒41, Munich, GRIN Verlag, https://www.grin.com/document/294184
