Hydroprocessing petroleum fractions has long been an integral part of refining operations. Hydroprocessing of Heavy Oils and Residua introduces fundamental concepts and current technology alongside an in-depth analysis of the chemistry and physics involved. Using current technology, the text shows how heavier feedstocks may be treated in hydroprocesses to afford maximum yields of high-value products. Chapters on the composition and evaluation of heavy oils and residua provide a basic understanding of the types of feedstock that need desulfurization treatment. The book presents examples and descriptions of commercial processes as well as methods of hydrogen production.