期刊
FUEL
卷 209, 期 -, 页码 538-544出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2017.08.024
关键词
Glycerol; Acetylation; Sulphonation; Deactivation; Heterogeneous; Catalyst
资金
- Universiti Sains Malaysia, (USM) under the USM fellowship scheme
- Ministry of Higher Education, Malaysia under the Transdisciplinary Research Grant Scheme (TRGS) [203/PJKIMIA/6762002]
Glycerol derived from biodiesel (BD) production is oversupplied and requires urgent utilization. Hence, crude bio-derived glycerol was utilized as a carbon precursor for heterogeneous solid acid catalyst synthesis via partial sulphonation and carbonization in a single step. The as-synthesized catalyst was utilized to catalyze glycerol acetylation reaction with acetic acid to produce oxygenated fuel additives (diacetin and triacetin) and monoacetin. Under reaction conditions of 110 degrees C, glycerol-to-acetic acid molar ratio of 3, 2 wt% catalyst dose, and 3 h reaction time, 88% combined DAG and TAG selectivity was attained with a corresponding glycerol conversion of 99%. The high surface acid sites density of the catalyst primarily contributed to its enhanced catalytic performance. The catalyst displayed sufficient heterogeneity and robustness in polar reaction media despite high hydrophilic acid sites density. Hence, it was reused in seven cycles of the experiment without experiencing significant deactivation.
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