Synthetic Sorbents for Removal of Sulfur Dioxide in Fluidized-bed Coal Combustors. [25 Refs].
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1977 |
ISBN-10 | : OCLC:1065638672 |
ISBN-13 | : |
Rating | : 4/5 (72 Downloads) |
Download or read book Synthetic Sorbents for Removal of Sulfur Dioxide in Fluidized-bed Coal Combustors. [25 Refs]. written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic sorbents have been investigated for use in place of limestone for SO/sub 2/ emission control in fluidized-bed coal combustors. Sorbents prepared by impregnation of porous alumina with alkali metal or alkaline earth oxides were studied. The most promising sorbent was found to be calcium oxide in alumina. However, the SO/sub 2/ reactivity of this synthetic sorbent was less than that for a moderately reactive limestone. Hence, a greater quantity of synthetic sorbent would be needed to meet SO/sub 2/ emission standards. The attrition resistance of this synthetic sorbent was found to be greater than that of natural stones; therefore, a larger number of cycles of use would be expected. It is estimated that the use of this synthetic sorbent would reduce the amount of waste sorbent to about one-sixth the amount expected using a moderately reactive once-through limestone. The cost of using this synthetic sorbent is estimated to be about three and a half times the cost expected using once-through limestone. This cost is considered to be too large in view of the expected modest decrease in environmental impact. The synthetic sorbents developed in this study are therefore not considered viable alternatives for limestone in fluidized-bed coal combustors.