The use of the Shell Coal Gasification Process (SCGP) in heavy crude- and tar sands-derived petroleum coke gasification
Conference
·
OSTI ID:229615
- Shell Synthetic Fuels, Inc., Houston, TX (United States)
The Shell Coal Gasification Process (SCGP) is a dry feed, entrained flow, oxygen-blown, coal gasification process which has the capability of converting virtually any coal or solid hydrocarbon such as petroleum coke into a clean medium Btu synthesis gas, or syngas. The SCGP syngas is a mixture of predominantly carbon monoxide along with significant amounts of hydrogen. This syngas can be used to for a variety of purposes including electric power generation, feedstock for chemical manufacture, hydrogen for refining applications, and, feedstock for direct synthesis of conventional transportation fuels using technologies such as the Shell Middle Distillate Synthesis Process (SMDS). The key features of SCGP are precise control of the pulverized coal or coke and the gasifier, which is a membrane wall surrounded by a pressure shell. Gasification conditions are optimized, depending on feedstock properties, to achieve the highest coal to gas conversion efficiency, with minimum formation of undesirable byproducts. The raw gas is then quenched, cooled, and solids removed at warm temperatures. The solids free gas is then treated by conventional methods to remove acid gases such as hydrogen sulfide and carbonyl sulfide. Ammonia formed in the gasification reaction is also scrubbed out. The solids are removed as a slag or flyash and are marketable byproducts. Development of SCGP began in 1972 and continued with the construction and operation of the SCGP-1 Demonstration Unit in Shell`s Deer Park Manufacturing Complex near Houston, Texas. SCGP-1 operated between 1987 and 1991 and was rated at a capacity of 250 tons per day. SCGP-1 clearly demonstrated the reliability, flexibility, efficiency, and environmental superiority of SCGP. High thermal and high sulfur removal efficiencies were demonstrated for a wide range of feedstocks including petroleum coke.
- OSTI ID:
- 229615
- Report Number(s):
- CONF-9502114--Vol.2
- Country of Publication:
- United States
- Language:
- English
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