An Overview of Unocal's Low Emission Gasoline Research Program

Jessup, Peter J.; Croudace, Michael C.; Wusz, Tim

doi:10.4271/920801

Cited by 12 publications

(2 citation statements)

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“…1 However, the most important aspect of MTBE was still based primarily on its good octane-enhancing property when used as a gasoline additive agent. 2,3 In fact, more than 95% of MTBE produced was used in this way. Industrially, MTBE was produced by the reaction of isobutene, contained in C4fractions, and methanol.…”

Section: Introductionmentioning

confidence: 99%

Core–Shell Zeolite Composite with Silicalite-1/NaY Structure for the Adsorption Desulfurization of Dimethyl Disulfide from Methyl tert-Butyl Ether

Yang

Meng

et al. 2018

Ind. Eng. Chem. Res.

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Desulfurization of dimethyl disulfide (DMDS) from methyl tertbutyl ether (MTBE) has been studied on the silicalite-1/NaY core−shell composites. By changing the mass ratio of tetraethyl orthosilicate (TEOS)/ NaY, the silicalite-1 shell synthesis condition was conducted at the mass ratio of TEOS/tetrapropylammonium hydroxide (TPAOH)/ethanol (EtOH)/H 2 O = (10, 15, 20, 25, 30 g):19 g:17 g:87 g ((0.048, 0.072, 0.096, 0.12, 0.144): 0.0234:0.369:4.8293 in molar ratio, where the mass of NaY zeolite was quantified to 5 g) by a hydrothermal synthesis at 180 °C for 24 h. Results showed that when the mass ratio of TEOS/TPAOH/EtOH/H 2 O/NaY = 20 g:19 g:17 g:87 g:5 g, the silicalite-1 coating could be dispersed and covered on the surface of NaY well (the thickness of silicalite-1 shell ranged from 100 to 400 nm) with the best sulfur adsorption capacity as 20.711 mg s /g adsorbent . The shape-selective adsorption mechanism of desulfurizing DMDS from MTBE on these core−shell composites was also elaborated.

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Section: Introductionmentioning

confidence: 99%

Core–Shell Zeolite Composite with Silicalite-1/NaY Structure for the Adsorption Desulfurization of Dimethyl Disulfide from Methyl tert-Butyl Ether

Yang

Meng

et al. 2018

Ind. Eng. Chem. Res.

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“…Τα οξείδια του αζώτου εμφάνισαν αυξητική τάση με τη μετωπική πτητικότητα (Τ 10 , τάση ατμών Reid) και τις ολεφίνες του καυσίμου. 185 Στην California, όπου το πρόβλημα της ρύπανσης είναι πολύ έντονο, η χρήση ανασχηματισμένης βενζίνης χαμηλής περιεκτικότητας σε αρωματικά (23%), ολεφίνες (4%), βενζόλιο (0.7%), θείο (40 ppm) και χαμηλής πτητικότητας ουράς (Τ90 < 149 °C) έδωσε σημαντικές μειώσεις σε όλες τις κατηγορίες ρύπων βοηθώντας τις αυτοκινητοβιομηχανίες να ικανοποιήσουν τα πολύ αυστηρά όρια εκπομπών που θα ισχύσουν. 186…”

Section: επίδραση του κινητήρα στις εκπομπέςunclassified