Aromatics reduction over supported platinum catalysts. 2: Improvement in sulfur resistance by addition of palladium to supported platinum catalysts

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie00039a019· OSTI ID:183088

Lin, T B ^[1]; Jan, C A; Chang, J R ^[2]

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1. National Chung Cheng Univ., Chia-Yi (Taiwan, Province of China). Dept. of Chemical Engineering
2. Chinese Petroleum Corp., Chia-Yi (Taiwan, Province of China)

Supported Pt catalysts were modified by adding a second metal such as Co, Mo, Ni, Re, Ag, and Pd. The effects of a second metal on the sulfur resistance were first investigated by accelerated aging test reactions. The test reactions were hydrogenation of tetralin containing 1,000 ppm sulfur at 280 C, 380 psig, and H{sub 2}/oil (mol) = 2.7. The results indicated that Pd-Pt catalyst had the highest sulfur resistance. Aromatics reduction, hydrodesulfurization, and hydrodenitrogenation of straight run distillate diesel over supported Pt and Pd-Pt catalysts were further examined by long-term stability tests. The operation conditions of these tests are the same as those run in a commercial diesel hydrotreating process. The results again indicated that the Pd-Pt catalyst exhibited much better catalytic performance. These results, together with electronic properties of the metal clusters on the catalysts characterized by FFT-IR spectroscopy, provide a basis to speculate the role of Pd in enhancing sulfur resistance; the Pd-Pt bimetallic interactions decrease the electron density of Pt and thereby inhibit the adsorption of H{sub 2}S.

• Sponsoring Organization: USDOE
• OSTI ID: 183088
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 12 Vol. 34; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ADDITIVES
CATALYSTS
COBALT
DEACTIVATION
DENITRIFICATION
DESULFURIZATION
DIESEL FUELS
DOPED MATERIALS
HYDROGENATION
MITIGATION
MOLYBDENUM
NICKEL
PALLADIUM
PLATINUM
REFINING
RHENIUM
SILVER
TETRALIN