Water-tolerant SBA-16 confined phosphotungstic acid for controllable
synthesis of jet fuel blending with cyclic ketones
Transferring lignocellulose-derived ketones to jet fuel blending through
aldol condensation has great potential for the synthesis of
high-performance jet fuels. However, the water formed in reaction
decreases the activity of catalyst, especially the acid catalyst.
Herein, water-tolerant SBA-16 confined phosphotungstic acid was
developed to be applied in this reaction with high performance. The
SBA-16-like pore size was regulated and the surface was modified by
alkylimidazole which improves the water-tolerant property of catalyst by
creating relative hydrophobic environment and leads to the resistance of
HPW leaching and keeping stable performance of the catalyst in 5 runs of
aldol condensation. About 64.2% primary-condensation products and
27.8% secondary-condensation products were produced by this catalyst.
After hydrodeoxygenation, a high-performance fuel blending with density
of about 0.905 g/mL and freezing point of -67 oC was obtained. This
study provides a promising water-tolerant catalyst to develop a new
route to produce high-performance bio-jet fuel blending.