Statistically rigorous parameter estimation in dynamic modeling using approximate empirical models

✍ Scribed by M. Frenklach; D. L. Miller

• Publisher: American Institute of Chemical Engineers
• Year: 1985
• Tongue: English
• Weight: 295 KB
• Volume: 31
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690310322

✦ Synopsis

concentrations in the effluent gas. Also the fractions absorbed in the dichloromethane trap were unknown. However, the analyses suggested that only a small amount of the total material was desorbed as phenol or diphenyl ether. Presumably, most of the desorbed substance were cracked products.

Conclusions

The results that we have found show that drying in air at 393 K results in desorption of 3896 of the initial weight ofiphenol adsorbed on carbon from aqueous solutions. Subsequent heating to 673 K caused an 11% loss in weight of the material remaining at 393 K.

Water, carbon dioxide, and very small amounts of phenol and diphenyl ether were identified as some of the desorption products in this temperature range, but UV analysis indicated that other species were also being desorbed. Additional heating to 1,073 K resulted in a further 42% loss in the weight of material remaining at 393 K. Phenol, and particularly cracked products, were desorbed in this high-temperature range. Of the material remaining after drying at 393 K, there was a residue of 47% after heating to 1,073 K.

ACKNOWLEDGMENT

The fellowship provided by Government of China is gratefully acknowledged. C. Krebs provided valuable assistance for analyzing