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• W1968050212 abstract "I am pleased to contribute, together with my Ph.D. student Zhongxiang Chen, this paper to the Ind. Eng. Chem. Res. special issue for Professor John Grace of the University of British Columbia in recognition of his many contributions to subjects of interest to readers in this journal. I have known John since the early 1970s (over 30 years now) when we were both studying for our Ph.D.'s in the U.K. (he was in Cambridge, and I was in Edinburgh). Since then, we have always been in close contact. I visited him at McGill and British Columbia Universities, and he visited me at King Saud and Auburn Universities, and we cooperated in the development of novel fluidized-bed reformers (e.g., Adris, A.; Grace, J.; Lim, C.; Elnashaie, S. S. E. H. Fluidized Bed Reaction System for Steam Hydrocarbon Gas Reforming to Produce Hydrogen. U.S. Patent 5,326,550, Jun 1994; Canadian Patent 2,081,170, Dec 2002). This was our first explicit application of the sequential debottlenecking methodology, although John has used the approach implicitly in many cases to develop novel processes. He is running the Fluidization Research Center (FRC), which he established in 1997 at the University of British Columbia (UBC) and which is funded by Mitsubishi Chemical Corporation (MCC), the Natural Science and Engineering Research Council of Canada (NSERC), and a number of other government and industrial sponsors. The contributions of Professor Grace to fluidization and fluidized-bed reactors are outstanding. Recently, he edited the excellent proceedings for the 7th International Conference on Circulating Fluidized Beds, Niagara Falls, Ontario, Canada, May 5−8, 2003, and contributed excellent papers to it. I would like to congratulate John for his latest award of the Innovation and Science Council of British Columbia for 2003. He was accorded this prestigious award for distinguishing himselfas an educator, researcher, and innovatorin his 35-year career as a leading authority on fluidization and chemical reaction engineering. I would like also to congratulate him for his recovery from his latest operation and wish him a fast and safe complete recovery. If you want to know more about the outstanding achievements of Professor John Grace, I advise you to visit his Web site at the University of British Columbia, Canada (http://faculty.chml.ubc.ca/jgrace/). The present paper is an investigation of the bifurcation behavior of a novel circulating fluidized-bed (CFB) autothermic reformer. I have learned a lot about CFBs from the excellent work of Professor John Grace. My Ph.D. student Zhongxiang Chen and I are happy to contribute this paper to this special IECR issue in the honor of this excellent academician. Said S. E. H. ElnashaieThe multiplicity of steady states (static bifurcation behavior, SBB) in a novel circulating fluidized-bed (CFB) membrane reformer for the efficient production of hydrogen by steam reforming of heptane (model component of heavy hydrocarbons) is investigated. The present paper highlights the practical implications of this phenomenon on the behavior of this novel reformer with a special focus on hydrogen production. Two configurations are considered and compared. One has catalyst regeneration before gas−solid separation, and the other has catalyst regeneration after gas−solid separation. The multiplicity of the steady states prevails over ranges of a number of design and operating parameters with significant impacts on the performance of the reformer. The basis of process evaluation is focused on the net hydrogen production. The dependence of the behavior of this autothermal CFB is shown to be quite complex and to defy the simple logic of nonautothermal processes. The unit can be a very efficient hydrogen producer provided that its bifurcation behavior is well understood and correctly exploited." @default.
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• W1968050212 title "Bifurcation Behavior and Efficient Pure Hydrogen Production for Fuel Cells Using a Novel Autothermic Membrane Circulating Fluidized-Bed (CFB) Reformer: Sequential Debottlenecking and the Contribution of John Grace" @default.
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• W1968050212 doi "https://doi.org/10.1021/ie0341799" @default.
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