Experimental Measurements of Temperature Rise

Direct experimental measurements of the temperature rise during sorption in a batch system have been reported by Eagan et al./ l Doelle and Riekert, and Ilavsky et al. The observed tcihpcraturc response curves were in all cases of the expected form, showing a rapid initial rise followed by a slow return to the ambient temperature. The absence of any. significant intraparticle temperature gradient was confirmed directly by Ilavsky et al. who 

FIGURE 6.19. Experimental uptake curves showing nonisothermal behavior, (a) Adsorption bf Nj at 195 K on 4A zeolite crystals, b) Adsorption of /j-heptane on 5A zeolite pellets. Measurements of the temperature rise show little difference betwieb the center and surface of the particle. [After refs. 23 and 25 (a) reprinted with permission from ref. 23. Copyright 1971 American Chemical Society, b) Reprinted with permission from CAem. Eng, Sci. 35, Ilavsky et al., Copyright 1980, Pergamon Press, Lid.]  

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