- Email: [email protected]
Coating monoliths
usually generate over 50 vol.-% aromatics and, via this, have been a major source for hydrogen for other uses. Limits set on the presence ofaromatics (<25vol.-%), as well as the tendency to add octane-enhancing oxygenates (MTBE, ETBE, etc.) in gasoline, have caused the reformers to cut down on capacity. Consequently, reforming developments nowadays are aimed at catalysts that give higher hydrogen yields and higher selectivii. Reforming using erionite-containing Pt/Al203 catalysts (J. Liers et al., Hydrocarbon Processing, (August 1993) 165) seem to be a solution for the problem of aromatics because it yields a product with high octane numbers and low amounts of aromatics. During reforming with a conventional Ptly-Al203 catalyst, the following reactions take place: dehydrocyclisation of alkanes to naphthenes, dehydrogenation of naphthenes to aromatics and hydrocracking of alkanes to naphthenes. A certain proportion of n-alkanes remains in the product, lowering the octane number. Erionite-based catalysts favour shape-selective hydrocracking of n-
alkanes and the formation of cyclopentane derivatives, thereby lowering the content of aromatics and increasing the octane number of the product during reforming reactions. By using a Ni/H-erionite catalyst, the octane rating can be increased by 3 to 7 numbers through selective hydrocracking of n-alkanes. The question that remains is whether there will be hydrogen yields high enough to offset loss in reformer capacity and hence the shortage of hydrogen. K. SESHAN
Coating Monoliths
A recent PhDThesis (W. B. Kolb, University of Tulsa, Department of Chemical Engineering, OK (1993)) gives a detailed, careful description of wash coating ceramic monoliths. The thesis focuses on understanding the wash coating process in terms of the flow mechanisms in the individual channels of the monolith. J. N. ARMOR
Calendar of Forthcoming Events New Items For full Calendar see Appl. Catal., 105(1993)NlO 21-22 Feb. 1994 Sydney, Australia
Mtg. on The Application of Chemistry to Environmental Protection
*Lecture
Contact: D.L. Trimm, School of Chem. Eng. and Ind. Chem., Univ. of New South Wales, P.O. Box 1, Kensington NSW 2033, Australia, (+ 61. 2) 6974340, fax. (+61-2) 6621567, e-mail [email protected]
Announcements are included free of charge at the discretion of the Editor. Information on planned events should be sent well in advance (preferably 6 months or more) to Prof. J.R.H. Ross, University of Limerick, Plassey Technological Park, Limerick, Ireland, fax. (+353-61) 411400 or to Applied Catalysis, Desk Editorial Office, PO. Box 330, 1000 AH Amsterdam, Netherlands, fax. (+31-20) 5662459.
applied catalysis A: General
Volume 105 No. 2 -
15 November 1993
alkanes and the formation of cyclopentane derivatives, thereby lowering the content of aromatics and increasing the octane number of the product during reforming reactions. By using a Ni/H-erionite catalyst, the octane rating can be increased by 3 to 7 numbers through selective hydrocracking of n-alkanes. The question that remains is whether there will be hydrogen yields high enough to offset loss in reformer capacity and hence the shortage of hydrogen. K. SESHAN
Coating Monoliths
A recent PhDThesis (W. B. Kolb, University of Tulsa, Department of Chemical Engineering, OK (1993)) gives a detailed, careful description of wash coating ceramic monoliths. The thesis focuses on understanding the wash coating process in terms of the flow mechanisms in the individual channels of the monolith. J. N. ARMOR
Calendar of Forthcoming Events New Items For full Calendar see Appl. Catal., 105(1993)NlO 21-22 Feb. 1994 Sydney, Australia
Mtg. on The Application of Chemistry to Environmental Protection
*Lecture
Contact: D.L. Trimm, School of Chem. Eng. and Ind. Chem., Univ. of New South Wales, P.O. Box 1, Kensington NSW 2033, Australia, (+ 61. 2) 6974340, fax. (+61-2) 6621567, e-mail [email protected]
Announcements are included free of charge at the discretion of the Editor. Information on planned events should be sent well in advance (preferably 6 months or more) to Prof. J.R.H. Ross, University of Limerick, Plassey Technological Park, Limerick, Ireland, fax. (+353-61) 411400 or to Applied Catalysis, Desk Editorial Office, PO. Box 330, 1000 AH Amsterdam, Netherlands, fax. (+31-20) 5662459.
applied catalysis A: General
Volume 105 No. 2 -
15 November 1993