Method of removing a metal from a stream of hot gas
First Claim
1. In a method of removing a metal from a stream of hot gas containing metal in the gaseous phase, wherein an aluminum-silicate compound and a calcium compound are contacted with the hot gas containing metal in the gaseous phase to absorb the metal, the improvement comprising using particles containing both calcium and aluminum-silicate to contact the hot gas containing metal in the gaseous phase, said particles comprising meta-kaolin and said particles formed by thermal conversion of a material selected from the group consisting of waste paper and residue from the paper industry.
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Abstract
The present invention relates to a method of removing a metal from a stream of hot gas, wherein a particulate material comprising calcium and aluminum-silicate is contacted in the hot gas to absorb metal present in the hot gas. According to the invention, a meta-kaolin-containing substance is introduced in the hot gas, said meta-kaolin-containing substance being formed by thermally converting a material chosen from the group of I) waste paper, and ii) residue from the paper industry. The invention may be used to remove metals before, during or after the combustion or gasification of fossil fuels, biomass and organic waste.
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Citations
20 Claims
- 1. In a method of removing a metal from a stream of hot gas containing metal in the gaseous phase, wherein an aluminum-silicate compound and a calcium compound are contacted with the hot gas containing metal in the gaseous phase to absorb the metal, the improvement comprising using particles containing both calcium and aluminum-silicate to contact the hot gas containing metal in the gaseous phase, said particles comprising meta-kaolin and said particles formed by thermal conversion of a material selected from the group consisting of waste paper and residue from the paper industry.
Specification