Showing papers by "J. D. Seader published in 1976"

Separation sequence synthesis by a predictor based ordered search

Abstract: A predictor based ordered search procedure is used to scan the graph representing all possible separation sequences for a given multicomponent separation process. The algorithmic procedure is expedited by utilizing an heuristic cost function to obtain lower bound estimates of the cost of separators not yet designed. Considerable reduction in search space occurs. Optimal and near optimal sequences are readily generated.

Recovery of bitumen from oil-impregnated sandstone deposits of utah.

Abstract: Characterization of the tar sands from the Uinta Basin is currently underway Compared with bitumen presently being extracted commercially from Canadian Athabasca tar sands, the bitumen from Utah is considerably lower in sulfur content (typically 04 wt percent compared to 42 wt percent) and higher in nitrogen content (1 wt percent compared to 036 wt percent) Furthermore, while Athabasca tar sands contain 3 wt percent water and have a significant clay content, Utah Uinta tar sands contain very little water and virtually no clay Bitumen content of the Utah tar sands varies considerably but is comparable with the value of 13 wt percent for the Athabasca tar sands presently being processed commercially Because of considerable differences in the chemical and physical nature of Utah tar sands as compared with Canadian tar sands, as well as the great differences in geographical and climatic conditions between the two regions, processing of Utah tar sands may require a different procedure from the one currently used commercially in Canada or from the procedures previously demonstrated in laboratory or pilot-plant studies on Canadian tar sands The status of research underway at the University of Utah to explore methods of extracting bitumen by both low- andmore » high-temperature techniques is presented« less