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Your search keyword '"Ahmed M. Tawfeek"' showing total 2 results
Start Over Author "Ahmed M. Tawfeek" Publisher springer science and business media llc
2 results on '"Ahmed M. Tawfeek"'

1. Multi-dimensional structural footprint identification for the design of potential scaffolds targeting METTL3 in cancer treatment from natural compounds

Author

Abdul Rashid Issahaku, Samukelisiwe Minenhle Mncube, Clement Agoni, Samuel K. Kwofie, Mohamed Issa Alahmdi, Nader E. Abo-Dya, Peter A. Sidhom, Ahmed M. Tawfeek, Mahmoud A. A. Ibrahim, Namutula Mukelabai, Opeyemi Soremekun, and Mahmoud E. S. Soliman

Subjects
Inorganic Chemistry, Computational Theory and Mathematics, Organic Chemistry, Physical and Theoretical Chemistry, Catalysis, Computer Science Applications
Published
2023

2. Catalytic conversion of polyols (sorbitol and xylitol) to hydrocarbons over hierarchical ZSM-5 zeolite catalysts in a fixed bed reactor

Author

Subramanian Sivasanker, Ahmed M. Tawfeek, R. Jothiramalingam, L. John Kennedy, C. Ragupathi, J. Judith Vijaya, S. Narayanan, T.M. Sankaranarayanan, and Hamad A. Al-Lohedan

Subjects
Atmospheric pressure, 010405 organic chemistry, Fixed bed, 010402 general chemistry, Xylitol, 01 natural sciences, Substrate concentration, Catalysis, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Chemical engineering, Organic chemistry, Sorbitol, Physical and Theoretical Chemistry, ZSM-5 zeolite, Space velocity
Abstract

The catalytic activity of hierarchical ZSM-5 zeolites was investigated in the polyols (sorbitol and xylitol) to hydrocarbons conversion in a fixed bed reactor under atmospheric pressure by altering different parameters. A lower sorbitol and xylitol conversion was achieved at the reaction temperature of 375 °C, whereas a higher value of 92.33 and 88.19% sorbitol conversion, 95.58 and 92.32% xylitol conversion was obtained when the reaction temperature was further elevated to 425 °C for ZSM-5-WS(28) and ZSM-5-WOS(28) catalysts. Other important parameters, such as substrate concentration, weight hourly space velocity (WHSV) and Si/Al ratio strongly influenced the polyols to hydrocarbons conversion reaction. The optimal conditions are substrate concentration (sorbitol/xylitol) of 15%, WHSV of 1.0 h−1, reaction temperature of 425 °C. In addition to that, the recycling performances of the ZSM-5 catalysts were carried out for four runs and the catalysts were showed better recycling performance and stability.

Published
2017

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