Highly Selective Synthesis of High Octane-Number Gasoline from Light Olefins on Fe-Silicates

Tomoyuki Inui, Fumio Okazumi, Junichi Tarumoto, Osamu Yamase, Hirokazu Matsijda, Hideo Nagata, Noboru Daito, Akira Miyamoto

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

The conversion of light olefins such as ethylene, propylene, and butenes to gasoline was investigated with various metallosilicates having a pentasil pore-opening structure. The metallosilicates were prepared using a novel rapid crystallization method by replacing the Al ingredient in the H-ZSM-5 with various metal salts at the gel formation stage. The silicates of Al(i.e., H-ZSM-5), Ga, V, Cr, and Zr were not highly effective for selective conversion to liquid products because of a significant formation of gaseous C1-C4 paraffins accompanied with the formation of aromatics. On the other hand, Fe-silicates were highly effective for selective formation of liquid products in the gasoline fraction. For example, 95.6% propylene fed was converted under the space velocity of 4,500 h-1 and at 300°C to the liquid products with a space-time yield as high as 8.09 kg/l.h. The octane-number of the gasoline produced was as high as 95 because of the high percentage of branched internal-olefins found in the liquid products. The Fe-silicate exhibited high activity and selectivity under various conditions, and maintained its steady performance at least 100 h on stream. The reason for this high gasoline selectivity of Fe-silicate was discussed in relation to its properties and performance in methanol conversion to hydrocarbons.

Original languageEnglish
Pages (from-to)249-257
Number of pages9
JournalJournal of The Japan Petroleum Institute
Volume30
Issue number4
DOIs
Publication statusPublished - 1987 Jan 1

Keywords

  • Ferrosilicate
  • Gasoline synthesis
  • Metallosilicate
  • Olefin conversion

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

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