Hydrodechlorination of 4-chlorophenol in aqueous phase with Pt–Al pillared clays using formic acid as hydrogen source
Catalysts based on pillared clays with Al and Pt were synthesized from a commercial bentonite and tested for catalytic hydrodechlorination (HDC) using 4-chlorophenol (4-CPhOH) as the target compound and formic acid as the hydrogen source. Stable Pt–Al pillared clays were obtained, showing a high act...
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Published in: | Applied clay science Vol. 45; no. 4; pp. 206 - 212 |
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Main Authors: | , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Elsevier B.V
01-08-2009
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Subjects: | |
Online Access: | Get full text |
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Summary: | Catalysts based on pillared clays with Al and Pt were synthesized from a commercial bentonite and tested for catalytic hydrodechlorination (HDC) using 4-chlorophenol (4-CPhOH) as the target compound and formic acid as the hydrogen source. Stable Pt–Al pillared clays were obtained, showing a high activity and a strong fixation of the active phase to the support. The influence of the method of introduction of Pt in the pillared clay (ion-exchange or impregnation) and the Pt content in the catalytic activity was checked. Likewise, operating variables such as reaction temperature, catalyst concentration and formic acid to 4-CPhOH molar ratio were studied; higher values of these variables gave rise to a higher 4-CPhOH conversion to phenol. An important deactivation of the catalyst was observed, probably due to the formation of carboneous deposits since no appreciable Pt leaching was detected. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0169-1317 1872-9053 |
DOI: | 10.1016/j.clay.2009.06.006 |