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알루미늄과 헤테로폴리산으로 개질된 메조포러스 실리카 상에서의 AKD 합성
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- Authors
- Advisor
- 이호인
- Issue Date
- 2003
- Publisher
- 서울대학교 대학원
- Keywords
- AKD(alkyl ketene dimer) ; Akd(alkyl ketene dimer) ; Al-SBA-15 ; Al-sba-15 ; 헤테로폴리산 ; Heteropoly acid ; 메조포러스 실리카 ; Mesoporous silica
- Description
- 학위논문(석사)--서울대학교 대학원 :응용화학부,2003.
- Abstract
- The commercial process of AKD synthesis has the environmental
problems that poisonous materials such as ethyl amine and hydrochloric
acid are used and produced, and has a drawback due to multiple
process. To overcome these problems, the catalytic dehydration reaction
over mesoporous silica was performed. Among the various mesoporous
silicas with different pore size and structure, SBA-15 showed the best
activity because of good mass transfer caused by large size pore and
two dimensional hexagonal array structure. However, other mesoporous
silica such as MCM-41, MCM-48 and MCF gave poor mass transfer
due to its typical pore structure resulting in the production of
byproducts such as stearic anhydride and alkene. Acid strength of
silanol group which act as active site could be controlled by
incorporating Al into the wall of SBA-15. This could make the
electronic effect on Bro¨n sted acid site of silanol group resulting in the
increase of the AKD yield. The reaction temperature was lowered by
about 100 ℃ maintaining the yield of AKD by supporting 5 wt% of
heteropoly acid to SBA-15.
- Language
- Korean
- URI
- http://dcollection.snu.ac.kr:80/jsp/common/DcLoOrgPer.jsp?sItemId=000000059871
https://hdl.handle.net/10371/68919
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