Adsorption of cobalt(II) ion on prepared TiO{sub 2} adsorbents in high temperature water

Journal Article · Mon Apr 01 04:00:00 EST 1996 · High Temperature and Materials Science

OSTI ID:376336

Kim, K R ^[1]; Lee, K J; Park, S B ^[2]

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1. Korea Atomic Energy Research Inst., Taejon (Korea, Republic of). NPP Life Management Section
2. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of)

TiO{sub 2} adsorbents were prepared by hydrolysis of Ti(OC{sub 3}H{sub 7}){sub 4} followed by heat treatment of their hydroxides. Their structures were studied by X-ray diffractometry and Fourier transform infrared spectrometer as a function of preparation pH. The Co{sup 2+} adsorption characteristics of the adsorbent in high temperature water were investigated in a stirred autoclave. CO{sup 2+} adsorption capacity of the TiO{sub 2} adsorbent was determined to be 0.09 mEq/g adsorbent in 280 C of high temperature water. The enthalpy change ({Delta}H{degree}) of about 34 kJ/mol caused by the adsorption of Co{sup 2+} on the TiO{sub 2} indicates that the adsorption is endothermic in the experimental temperature range (150--280 C). It was shown that specific surface area and surface OH groups of these adsorbents are not dominant factors for Co{sup 2+} adsorption on oxides at high temperature.

• OSTI ID: 376336
• Journal Information: High Temperature and Materials Science, Journal Name: High Temperature and Materials Science Journal Issue: 2 Vol. 35; ISSN 1080-1278; ISSN HTMSFP
• Country of Publication: United States
• Language: English

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