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Production of biodiesel from acid oil using sulfuric acid as catalyst: Kinetics study
(Oxford University Press, 2011-03)
Biodiesel production is becoming more relevant due to its environmental advantages together with the global petroleum situation regarding decreases of the reserves, instability of the prices and so on. The kinetics of the ...
Obtaining cellulose nanocrystals from pineapple crown fibers by free-chlorite hydrolysis with sulfuric acid: physical, chemical and structural characterization
(2020-07-01)
Brazil is the second-largest world producer of pineapple and generates almost 45% of its initial mass in wastes after industrialization, mainly due to the inappropriate deposition of peel and crown, which contribute to ...
Reaction rates of lignin and hexenuronic acids with chlorine dioxide, ozone, and a sulfuric acid
(2008-04-01)
The reaction rates of lignin and hexenuronic acids (HexA) with chlorine dioxide, ozone, and sulfuric acid were investigated. In unbleached and oxygen-delignified eucalyptus kraft pulps containing both lignin and HexA, only ...
Influence of alternative and conventional surface treatments on the bonding mechanism between peek and veneering resin for dental application
(2021-06-01)
This study evaluated the influence of conventional and alternative surface treatments on wettability and the bond strength between polyether ether ketone (PEEK) and veneering resin. PEEK samples were randomly divided into ...