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Titolo:
Sulfur reduction in cracked naphtha by a commercial additive: effect of feed and catalyst properties
Autore:
Hernandez-Beltran, F; Moreno-Mayorga, JC; Quintana-Solorzano, R; Sanchez-Valente, J; Pedraza-Archila, F; Perez-Luna, M;
Indirizzi:
Inst Mexicano Petr, Mexico City 07730, DF, Mexico Inst Mexicano Petr Mexico City DF Mexico 07730 ico City 07730, DF, Mexico Inst Politecn Nacl, ESIQIE, Mexico City 007730, DF, Mexico Inst Politecn Nacl Mexico City DF Mexico 007730 o City 007730, DF, Mexico
Titolo Testata:
APPLIED CATALYSIS B-ENVIRONMENTAL
fascicolo: 2, volume: 34, anno: 2001,
pagine: 137 - 148
SICI:
0926-3373(20011105)34:2<137:SRICNB>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
GASOLINE;
Keywords:
FCC; naphtha sulfur reduction; feed effect; catalyst effect; additive;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Hernandez-Beltran, F Inst Mexicano Petr, Eje Cent L Cardenas 152, Mexico City 07730, DF, Mexico Inst Mexicano Petr Eje Cent L Cardenas 152 Mexico City DF Mexico 07730
Citazione:
F. Hernandez-Beltran et al., "Sulfur reduction in cracked naphtha by a commercial additive: effect of feed and catalyst properties", APP CATAL B, 34(2), 2001, pp. 137-148

Abstract

While the use of selective additives and catalysts might be the most economical and easiest solution for refinery operations in reducing the sulfur concentration in catalytic cracked naphtha their effectiveness is still limited. A better knowledge on the chemistry of sulfur compounds under crackingconditions would help to improve the performance of such additives. In this work, the sulfur content (in terms of alkyl-thiophenes and benzothiophene) in cracked naphtha was studied in regard to the feed and catalyst properties and the effect of a commercial sulfur reduction additive. Two equilibrium catalysts (REHY and REUSY) and two feedstock from Isthmus and Maya crudeoils were compared in a fluidized fixed bed microreactor. The sulfur content in the naphtha was lower with REHY thus confirming reported trends involving hydrogen transfer and contaminant metals effects. The sulfur compoundscontained in the Maya feed were comparatively more reactive than those contained in a conventional Isthmus/Maya (70/30). Assuming that the Maya feed is richer in long chain alkyl-thiophenes it produced proportionally higher amount of C-1-C-4 alkyl-thiophenes in the naphtha. The additive reduced theamount of C-1-C-4 alkyl-thiophenes by preventing their formation and producing alkyl-benzothiophenes by hydrocyclization. REHY produced less sulfur-in-naphtha by converting such compounds to H2S and light gases. The additiveshowed a limited effect on naphtha sulfur reduction with either the Maya feed or REHY An inhibitory effect due to H2S adsorption is also proposed to explain this limited effect. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/10/20 alle ore 12:48:48