Degree Name
MS (Master of Science)
Program
Chemistry
Date of Award
5-2020
Committee Chair or Co-Chairs
Aleksey Vasiliev
Committee Members
Greg Bishop, Abbas Shilabin
Abstract
Superacidic mesoporous materials containing covalently embedded PTA were synthesized by sol-gel method. Tetraethyl orthosilicate (TEOS) and phosphotungstic acid (PTA) were used as precursors in the synthesis, ionic and nonionic surfactants were used as pore-forming agents, the reaction proceeded in acidic media. TEM images revealed mesoporous structure with embedded PTA clusters. FT-IR spectra of obtained materials contained characteristic bands of PTA at 957 cm-1. Synthesized catalysts had high BET surface area and high concentration of acidic sites. Alkylation of 1,3,5-trimethylbenzene by 1-decene demonstrated high catalytic activity. The catalyst obtained with Pluronic P123 as a template was the most effective and resulted in highest conversion of 1-decene into alkylated products. Covalent embedding of PTA clusters in addition to thermal and chemical stability of synthesized catalysts enabled their recyclability. Catalysts remained active during subsequent cycles of alkylation.
Document Type
Thesis - unrestricted
Recommended Citation
Kuvayskaya, Anastasia, "Immobilization of Phosphotungstic Acid on Silica Surface for Catalytic Alkylation of Aromatic Compounds" (2020). Electronic Theses and Dissertations. Paper 3738. https://dc.etsu.edu/etd/3738
Copyright
Copyright by the authors.