期刊
POLYMERS
卷 13, 期 17, 页码 -出版社
MDPI
DOI: 10.3390/polym13172850
关键词
bio-based alpha-olefins; long-chain alpha-olefins; waste fatty alcohol; dehydration; solvothermal method
资金
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [NRF2020M1A2A207980212]
Al2O3 prepared by solvothermal synthesis was used as a catalyst for the catalytic dehydration of a bio-based fatty alcohol, selectively producing long-chain linear-alpha-olefins (LAO). By adjusting the synthesis temperature, amorphous alumina with the highest surface area and total pore volume was obtained, achieving efficient dehydration results.
The catalytic dehydration of a bio-based fatty alcohol was performed using Al2O3 prepared by solvothermal synthesis for selective production of long-chain linear-alpha-olefins (LAO). The effect of the synthesis temperature of alumina precursors on the dehydration of 1-octadecanol (C18H38O) was examined based on the textural properties and Lewis acid-base properties of the catalysts. Amorphous alumina synthesized at 325 degrees C showed the highest surface area (233.07 m(2)/g) and total pore volume (1.237 cm(3)/g) among the catalysts and the best dehydration results: 93% conversion, 62% selectivity of 1-octadecene (C18H36), and 89% LAO purity. This was attributed to the increased Al/O ratio and atomic concentration of surface O in alumina, which were important factors in the catalytic dehydration of 1-octadecanol through the synergistic catalysis of acid-base pairs. The produced bio-based LAO can be key intermediates for synthesis of oxo alcohols and poly-alpha-olefins, as alternatives to petroleum-based LAO to achieve carbon neutrality in chemical industry.
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