WO3-modified KIT-6 catalysts synthesized via a non-hydrolytic sol–gel method for glycerol dehydration to acrolein
Reaction Chemistry and Engineering, cilt.11, sa.8, ss.1747-1758, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 11 Sayı: 8
- Basım Tarihi: 2026
- Doi Numarası: 10.1039/d6re00079g
- Dergi Adı: Reaction Chemistry and Engineering
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex
- Sayfa Sayıları: ss.1747-1758
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet
Özet
The expansion of biodiesel production has generated a surplus of glycerol. The valorization of this renewable by-product into value-added chemicals has therefore gained increasing interest. This study presents a systematic investigation of WO3/KIT-6 catalysts prepared via a non-hydrolytic sol–gel (NHSG) method for glycerol dehydration to acrolein. Catalysts with 5–35 wt% WO3 were synthesized and systematically characterized. XRD confirms the formation of monoclinic WO3 across the investigated samples. The 25 wt% WO3/KIT-6 catalyst exhibits the highest medium-strength acid site concentration (204 μmol NH3 per g), intrinsic acidity (0.56 μmol NH3 per m2), and a Brønsted/(Brønsted + Lewis) ratio of 0.67. Under the studied reaction conditions, this catalyst achieves 83% glycerol conversion and 43% acrolein selectivity. The results indicate that an optimal balance between medium-strength acidity and mesostructural properties governs acrolein selectivity and catalyst stability.