Effect of temperature, syngas space velocity and catalyst stability of Co-Mn/CNT bimetallic catalyst on Fischer Tropsch synthesis performance

• Main Authors: Akbarzadeh, Omid, Alshahateet, Solhe F., Zabidi, Noor Asmawati Mohd, Moosavi, Seyedehmaryam, Kordijazi, Amir, Babadi, Arman Amani, Hamizi, Nor Aliya, Abdul Wahab, Yasmin, Chowdhury, Zaira Zaman, Sagadevan, Suresh
• Format: Article
• Published: MDPI 2021
• Subjects: QD Chemistry
• Online Access: http://eprints.um.edu.my/34317/
• Institution: Universiti Malaya

The effect of reaction temperature, syngas space velocity, and catalyst stability on Fischer-Tropsch reaction was investigated using a fixed-bed microreactor. Cobalt and Manganese bimetallic catalysts on carbon nanotubes (CNT) support (Co-Mn/CNT) were synthesized via the strong electrostatic adsorption (SEA) method. For testing the performance of the catalyst, Co-Mn/CNT catalysts with four different manganese percentages (0, 5, 10, 15, and 20%) were synthesized. Synthesized catalysts were then analyzed by TEM, FESEM, atomic absorption spectrometry (AAS), and zeta potential sizer. In this study, the temperature was varied from 200 to 280 degrees C and syngas space velocity was varied from 0.5 to 4.5 L/g.h. Results showed an increasing reaction temperature from 200 degrees C to 280 degrees C with reaction pressure of 20 atm, the Space velocity of 2.5 L/h.g and H-2/CO ratio of 2, lead to the rise of CO % conversion from 59.5% to 88.2% and an increase for C5+ selectivity from 83.2% to 85.8%. When compared to the other catalyst formulation, the catalyst sample with 95% cobalt and 5% manganese on CNT support (95Co5Mn/CNT) performed more stable for 48 h on stream.