Highlights
The chitosan obtained shows physicochemical properties similar to commercials.
The low molecular chitosan for harvesting microalgae shows better results than aluminum sulfate.
The use chitosan for harvesting microalgae reduces the process costs.
In this study, the effect of the metal/acid balance of
Pt/mordenite
catalysts on the activity, product distribution, and main reaction
pathways during the hydroconversion of 2-methylnaphthalene (2-MN)
was analyzed. The hydroconversion study was performed on Pt/mordenite
catalysts having different metal/acid ratios in a batch reactor at
4.13 MPa (cold charge) and 523–573 K. The catalysts were characterized
by XRD, 27Al NMR spectroscopy, FTIR spectroscopy of adsorbed
pyridine, and TEM. The results indicate that, by using a bifunctional
catalyst consisting of a well-crystallized mordenite whose acid function
consists mainly of Brönsted acidity and with a strong hydrogenating
function such as dispersed platinum, it is possible to promote the
hydroconversion of 2-MN through a complex reaction scheme consisting
of isomerization, hydrogenation, ring contraction, ring opening, and
cracking. These reactions produce high-value hydrocarbons such as
alkyl cycloparaffins, paraffins, and isoparaffins, which decrease
the aromatic character of the feed and open a potential route to improve
the quality of the polyaromatic-rich fractions.
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