Journal
JOURNAL OF WOOD SCIENCE
Volume 46, Issue 1, Pages 52-58Publisher
SPRINGER-VERLAG TOKYO
DOI: 10.1007/BF00779553
Keywords
activated carbon moldings; activated carbon sheet; cellulosic material; methane adsorption; pore distribution; softwood acetic acid lignin; thermostabilization
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As an example of activated carbon (AC) moldings, AC sheets were prepared from thermoplastic acetic acid lignin by lamination. The resulting AC sheets are a new type of product that can be applied as water and air cleaners. Powdered softwood acetic acid lignin (SAL) was molded into sheets by a thermal pressing method. When the sheet was carbonized under a stream of nitrogen at 1000 degrees C, it was deformed with expansion and contained much foam. The deformation during carbonization was suppressed by the addition of pulp to the lignin. A sheet prepared by mixing lignin with pulp was directly carbonized without thermostabilization. The carbonized sheet was activated with steam for 2 h. The resulting AC sheet had adsorption properties, such as specific surface and iodine adsorption capacity, comparable to those of commercial AC powders or granules. Furthermore; the AC sheet had a larger capacity to adsorb methane than did the commercial AC powder. Therefore, SAL seems to be a promising source for the AC moldings.
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