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Compensation effects were found in isopropanol dehydration over alumina (A), titania (T) and corresponding mixed oxides (Al/Ti=2 and 25mol ratio, AT2 and AT25, respectively) synthesized by low-temperature sol–gel. Prepared materials (calcined in the 573–1173K) range were characterized by several techniques (N 2 physisorption, XRD, thermal analysis and SEM). In general, Al 2 O 3...
Al 2 O 3 –MgO catalytic supports were modified with different amounts of lithium in order to obtain novel Al 2 O 3 –MgO–Li(x) formulations containing basic sites. The basic sites on samples surface were identified and quantified through CO 2 chemisorptions. It was found that total amount of basic sites increases as the Li content increases. The Li identification...
The effect of removal extent of nitrogen-containing species on the hydrodesulfurization (HDS) of straight-run gas oil from a Mexican refinery over a NiMo-based catalyst was studied. The original middle distillate (∼360ppmN) was subjected to N-compounds removal by contacting with a proprietary adsorbent. By varying contact time, feedstocks of ∼234 and ∼137ppmN were obtained. Progressive improvement...
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