dc.contributor.author |
Nicolaides, CP
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dc.contributor.author |
Stotijn, CJ
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dc.contributor.author |
Van der Veen, ERA
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dc.contributor.author |
Visser, MS
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dc.date.accessioned |
2007-06-29T07:46:54Z |
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dc.date.available |
2007-06-29T07:46:54Z |
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dc.date.issued |
1993-09-24 |
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dc.identifier.citation |
Nicolaides, CP, et al. 1993. Conversion of methanol and isobutanol to MTBE. Applied Catalysis A-General, vol. 103(2), pp 223-232 |
en |
dc.identifier.issn |
0926-860X |
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dc.identifier.uri |
http://hdl.handle.net/10204/747
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dc.description |
Copyright: 1993 Elsevier Science BV |
en |
dc.description.abstract |
Over the resin catalyst Amberlyst 15, and under our reaction conditions, the yield of MTBE (methyl tert-butyl ether), from the reaction of methanol and isobutene, is at a maximum in the temperature rang of 40-60-degrees-C. Slightly higher temperatures (70-90-degrees-C) are needed when using zeolite H-ZSM-5 as catalyst for the etherification reaction. When isobutanol and methanol are passed over these catalysts at temperatures below 100-degrees-C, extremely low conversions (<1% by mass) are obtained. Over the resin catalyst and at 121-degrees-C, 3.3% of MTBE+MIBE (methyl isobutyl ether) is obtained where MTBE: MIBE = 1:7.4. Since the initial rate of the etherification reaction has been shown to be first order in the alkene, the authors investigated the dehydration reaction of isobutanol over H-ZSM-5. It was found that this reaction proceeds at temperatures above 150-degrees-C, indicating that the formation of the butenes from isobutanol proceeds at a higher temperature than the etherification reaction. Furthermore, our results with Amberlyst 15 show that the resin catalyst is unable to catalyze the isobutanol dehydration reaction within its recommended usable temperature range. A two-reactor system was therefore employed to implement the overall catalytic conversion of methanol and isobutanol to MTBE. For the dehydration step we employed a silica-alumina catalyst at 225-degrees-C, since this catalyst exhibits a higher dehydration activity for isobutanol than for methanol, as compared with gamma-alumina and H-ZSM-5. The product stream from the dehydration step was then fed to reactor 2 which was loaded with the Amberlyst 15 catalyst maintained at 50-degrees-C. The two-reactor system produced a significantly higher yield of MTBE+MIBE (2 7.8%), with the MTBE: MIBE ratio being reversed to 11.7:1. |
en |
dc.language.iso |
en |
en |
dc.publisher |
Elsevier Science BV |
en |
dc.subject |
Amberlyst-15 |
en |
dc.subject |
Etherification |
en |
dc.subject |
Isobutanol |
en |
dc.subject |
Methanol |
en |
dc.subject |
MTBE |
en |
dc.subject |
Methyl tert-butyl ether |
en |
dc.subject |
Zsm-5 |
en |
dc.title |
Conversion of methanol and isobutanol to MTBE |
en |
dc.type |
Article |
en |
dc.identifier.apacitation |
Nicolaides, C., Stotijn, C., Van der Veen, E., & Visser, M. (1993). Conversion of methanol and isobutanol to MTBE. http://hdl.handle.net/10204/747 |
en_ZA |
dc.identifier.chicagocitation |
Nicolaides, CP, CJ Stotijn, ERA Van der Veen, and MS Visser "Conversion of methanol and isobutanol to MTBE." (1993) http://hdl.handle.net/10204/747 |
en_ZA |
dc.identifier.vancouvercitation |
Nicolaides C, Stotijn C, Van der Veen E, Visser M. Conversion of methanol and isobutanol to MTBE. 1993; http://hdl.handle.net/10204/747. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Nicolaides, CP
AU - Stotijn, CJ
AU - Van der Veen, ERA
AU - Visser, MS
AB - Over the resin catalyst Amberlyst 15, and under our reaction conditions, the yield of MTBE (methyl tert-butyl ether), from the reaction of methanol and isobutene, is at a maximum in the temperature rang of 40-60-degrees-C. Slightly higher temperatures (70-90-degrees-C) are needed when using zeolite H-ZSM-5 as catalyst for the etherification reaction. When isobutanol and methanol are passed over these catalysts at temperatures below 100-degrees-C, extremely low conversions (<1% by mass) are obtained. Over the resin catalyst and at 121-degrees-C, 3.3% of MTBE+MIBE (methyl isobutyl ether) is obtained where MTBE: MIBE = 1:7.4. Since the initial rate of the etherification reaction has been shown to be first order in the alkene, the authors investigated the dehydration reaction of isobutanol over H-ZSM-5. It was found that this reaction proceeds at temperatures above 150-degrees-C, indicating that the formation of the butenes from isobutanol proceeds at a higher temperature than the etherification reaction. Furthermore, our results with Amberlyst 15 show that the resin catalyst is unable to catalyze the isobutanol dehydration reaction within its recommended usable temperature range. A two-reactor system was therefore employed to implement the overall catalytic conversion of methanol and isobutanol to MTBE. For the dehydration step we employed a silica-alumina catalyst at 225-degrees-C, since this catalyst exhibits a higher dehydration activity for isobutanol than for methanol, as compared with gamma-alumina and H-ZSM-5. The product stream from the dehydration step was then fed to reactor 2 which was loaded with the Amberlyst 15 catalyst maintained at 50-degrees-C. The two-reactor system produced a significantly higher yield of MTBE+MIBE (2 7.8%), with the MTBE: MIBE ratio being reversed to 11.7:1.
DA - 1993-09-24
DB - ResearchSpace
DP - CSIR
KW - Amberlyst-15
KW - Etherification
KW - Isobutanol
KW - Methanol
KW - MTBE
KW - Methyl tert-butyl ether
KW - Zsm-5
LK - https://researchspace.csir.co.za
PY - 1993
SM - 0926-860X
T1 - Conversion of methanol and isobutanol to MTBE
TI - Conversion of methanol and isobutanol to MTBE
UR - http://hdl.handle.net/10204/747
ER -
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en_ZA |