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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