Abstract: . . .  hydrogen production, NREL/TP-510-31949. National Renewable Energy Laboratory: Golden, CO, April 2002. [11] Lewandowski A. Performance characterization of the SERI high-flux solar furnace. Solar Energy Materials 1991; 24: 550-563. [12] Dahl JK, Barocas VH, Clough DE, Weimer AW. Intrinsic kinetics for rapid decomposition of methane in an aerosol flow reactor. International Journal of Hydrogen Energy 2002; 27: 377-386. [13] HYSYS Plant Process Simulator. Hyprotech Ltd, Calgary, Alberta Canada. (2002). [14] ICARUS Process Evaluator. Aspen Technology Cambride, MA (2002). [15] Cooper JF, Cherepy N, Berry . . .
. . .  in TPI and total variable operating (TVC) costs is shown in Figures 11 and 12, respectively. 4000 2000 U.S. Dollars ($) 0 20 03 20 05 20 15 20 07 20 17 20 19 20 09 20 01 20 13 20 21 -2000 -4000 -6000 -8000 -10000 Figure 10. Net cash flow (2 yr construction, 20 year life, 90% capacity) Conclusions A solar-thermal process is being developed for rapidly dissociating NG to co-products H2 and carbon black. The process allows rapid on/off processing that is very compatible with the on/off nature of sunlight. Conversions approaching 80% have been demonstrated at residence times on the order of 0.1 s without . . .
. . .  exceeding 75% have been obtained at 1875 K for residence times on the order of 0.1 s. These results indicate that conversion is more sensitive to changes in hot zone gas temperature than to changes in residence time for the range of times considered (0.06-0.12 sec). It should be noted that complete dissociation is expected at these temperatures. It is believed that the conversion was limited by heat transfer. Future experiments will include the co-feeding of fine carbon black particles to act as radiation absorbers for heating the gas. 4 Proceedings of the 2002 U.S. DOE Hydrogen Program Review . . .
. . .  Springer-Verlag 1984. [8] Van Hook JP. Methane-steam reforming. Catalysis Reviews: Science and Engineering 1980; 21(1): 1-51. [9] Kirk-Othmer. Kirk-Othmer Encyclopedia of Chemical Technology. New York: John Wiley & Sons 1992; Vol 4: 960-961, 989-991, 1015-1031. [10] Spath PL, Amos WA. Assessment of natural gas splitting with a concentrating solar reactor for hydrogen production, NREL/TP-510-31949. National Renewable Energy Laboratory: Golden, CO, April 2002. [11] Lewandowski A. Performance characterization of the SERI high-flux solar furnace. Solar Energy Materials 1991; 24: 550-563. [12] Dahl . . .
. . .  Springer-Verlag 1984. [8] Van Hook JP. Methane-steam reforming. Catalysis Reviews: Science and Engineering 1980; 21(1): 1-51. [9] Kirk-Othmer. Kirk-Othmer Encyclopedia of Chemical Technology. New York: John Wiley & Sons 1992; Vol 4: 960-961, 989-991, 1015-1031. [10] Spath PL, Amos WA. Assessment of natural gas splitting with a concentrating solar reactor for hydrogen production, NREL/TP-510-31949. National Renewable Energy Laboratory: Golden, CO, April 2002. [11] Lewandowski A. Performance characterization of the SERI high-flux solar furnace. Solar Energy Materials 1991; 24: 550-563. [12] Dahl JK, Barocas . . .
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