February 2002

Special Report: Clean Fuels

Revamp your hydrotreater for deep desulfurization

Retrofit projects involve defining the limits on existing equipment, understanding the costs for replacement and optimizing unit design parameters

Regulatory actions in North America and Europe mandate the production of ultra-low sulfur diesel (ULSD). To process ULSD, refiners will be considering process changes such as revamping existing hydrotreaters. But what is the cost to blend ULSD? The experiences from two case histories illustrate the parameters and methodologies needed to convert existing units to handle ULSD. Both units are currently operating. When retrofitting a diesel hydrotreater (DHT), the authors review DHT revamp requirements, limitations and relative benefits. The focus is on equipment and process design concepts necessary to achieve a successful conversion. Meeting the regulations. Recent clean f

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