Vapour-phase air oxidation of isobuthylene over bismuth-molybdate catalysts = 비스무드-몰리브데이트 촉매들에 의한 이소부틸렌의 기상공기 산화에 관한 연구

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The vapor-phase air oxidation of isobutylene to methacrolein over bismuth molybdate catalysts were investigated in an isothermal integral flow reactor at atmospheric pressure between 300 and 600℃. Various bismuth molybdates were characterized by X-ray diffraction, in spectra, and DTA analysis as α-, β-, γ-bismuth molybdate. With these defined catalysts activity test was carried out. γ-Bismuth molybdate had the highest activity for the oxidation of isobutylene of the three catalysts. Then, for the study of kinetics of oxidation of isobutylene over γ-bismuth molybdate catalyst the effects of several variables, feed ratio of oxygen to isobutylene, reaction temperature and the reciprocal of space velocity on the conversion and product distribution were determined by gas chromatography. Through 13 different mechanisms were postulated, the rate of reaction was most satisfactorily correlated by a mechanism which assumes the rate-controlling step to be the surface reaction between charged adsorbed isobutylene and oxygen. The rate expression $$γ= \frac{K_SK_AP_A}{1+K_AP_A+K_RP_R}×\frac{K_BP_B}{1+K_BP_B}$$ fitted the data best. And derived rate and adsorption coefficients satisfy the Boudart criteria.
Advisors
Kim, Young-GulUhm, Sung-Jin김영걸엄성진
Description
한국과학기술원 : 화학공학과,
Publisher
한국과학기술원
Issue Date
1984
Identifier
64092/325007 / 000823511
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 화학공학과, 1984.2, [ [v], 103, [1] p. ]

URI
http://hdl.handle.net/10203/29293
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=64092&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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