Ronald G. McClung Engelhard Corp. Edison, N.J. Reduction of sulfur in catalytic reforming feeds below that typically obtainable with naphtha hydrotreating improves the reformer operation significantly. In evaluations of pilot-plant and commercial operations by Engelhard Corp., high-rhenium content reforming catalysts have been used with low-sulfur naphtha feeds and have been shown to dramatically affect catalyst cycle length, gasoline yield, and stability. The consequences of insufficient removal of sulfur include shorter cycle length, more rapid reactor temperature rise to maintain octane, and as a result of that increase, mo...

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