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Carbon Coating on SiO 2 in Co/C‐SiO 2 Catalysts for High and Stable Activity in Nitrobenzene Hydrogenation
Author(s) -
Kondeboina Murali,
Enumula Siva Sankar,
Muppala Ashok Raju,
Madduluri Venkata Rao,
Burri David Raju,
Kamaraju Seetha Rama Rao
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701361
Subject(s) - nitrobenzene , catalysis , aniline , materials science , carbon fibers , particle size , chemical engineering , activated carbon , coating , chemistry , organic chemistry , composite material , composite number , adsorption , engineering
Since 5 % Co/SiO 2 catalysts exhibited good activity in nitrobenzene hydrogenation when compared other supported (Al 2 O 3 , ZrO 2 , TiO 2 ) catalysts(SI), effect of Co loading on SiO 2 support against aniline synthesis was studied in vapour phase conditions. Variation of Co loading revealed that 5 % Co/SiO 2 is a better catalyst in terms of nitrobenzene hydrogenation activity. Smaller Co particle size with good number of active sites are helpful in exhibiting good activity by this catalyst .However this catalyst suffers activity loss after 7 th hour due to coking. In order to sustain the activity for longer duration SiO 2 surface was coated with carbon prior to deposition of Co and found that this Co/C‐SiO 2 catalyst exhibited high and steady activity during the time on steam study.