Influence of Reduction Time on Specific Surface Area of SSI

Abstract:

Spherical sponge iron (SSI) with high activity and intension possesses potential characteristics to be utilized as wastewater treatment material. Influence of reduction time on specific surface area and distribution of different diameter holes were investigated. It was suggested that reductive time has significant influence on the specific surface area of SSI reduced by hydrogen under the optimized temperature. When the reductive time increased from t1 to t3, the porosity increased from 44.32% to 50.62%. While the specific surface area of SSI declined significantly from 3.089 m2/g to 0.307 m2/g when the reductive time increased from t1 to t3. On the other hand, newly formed nucleus should be combined with the adjacent formed one, and larger holes were formed. Consequently, the specific surface area of SSI declined quickly while the reduction time was prolonged, and the mean pore size varied from 275.7nm to 4611.3 nm. To utilize the SSI in wastewater treatment to remove pollutants, t1 was the optimized reductive time for its preparation.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 1450-1453
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.1450
• Online since: February 2012
• Authors: Jun Guo Li, Wei Tian, Shou Zhang Li
• Keywords: Mean Pore Size, Reduction Time, Specific Surface Area, Spherical Sponge Iron (SSI)

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