id	keyword
alkej-293	� �
alkej-293	pvoh
alkej-293	storage
alkej-293	energy
alkej-293	paraffin
alkej-293	materials
alkej-293	wax
alkej-293	heat
alkej-293	system
alkej-293	conductivity
alkej-293	energy storage
alkej-293	journal
alkej-293	base
alkej-293	paraffin wax