Abstract
The mechanism of cation replacement in the Li1-xHxAlO2; 0.00 ≤x ≤ 0.90 system was investigated with XRD. Examination of the peak position and intensity associated with the 018 and 110 Bragg reflections {Mathematical expression} in a series of partially replaced samples showed that the cation replacement process proceeded by a two phase mechanism. Catalytic characterization of αLiAlO2 with the 2-propanol probe reaction revealed the formation of the condensation products methyl-cyclopentene, 4-methyl-2-pentanone, and 4-methyl-2-pentanol. These products were seen in addition to propylene and acetone. Catalytic characterization of Li1-xHxAlO2;x = 0.90 with 2-propanol showed a significant decrease in condensation activity and no change in the propylene/acetone ratio relative to αLiAlO2. This suggests that the decrease in the amount of lithium eliminated the basic sites necessary for the condensation reactions.
| Original language | English |
|---|---|
| Pages (from-to) | 139-146 |
| Number of pages | 8 |
| Journal | Catalysis Letters |
| Volume | 12 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - Mar 1992 |
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Keywords
- Catalysis by LiHAlO
- reactions of 2-propanol on LiHAlO
- structure of LiHAlO catalyst
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Catalysis
Cite this
Characterization of the Li1-xHxAlO2 system; 0.00 ≤x ≤ 0.90. / Tomczak, D. C.; Thong, S. H.; Poeppelmeier, Kenneth R.
In: Catalysis Letters, Vol. 12, No. 1-3, 03.1992, p. 139-146.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Characterization of the Li1-xHxAlO2 system; 0.00 ≤x ≤ 0.90
AU - Tomczak, D. C.
AU - Thong, S. H.
AU - Poeppelmeier, Kenneth R
PY - 1992/3
Y1 - 1992/3
N2 - The mechanism of cation replacement in the Li1-xHxAlO2; 0.00 ≤x ≤ 0.90 system was investigated with XRD. Examination of the peak position and intensity associated with the 018 and 110 Bragg reflections {Mathematical expression} in a series of partially replaced samples showed that the cation replacement process proceeded by a two phase mechanism. Catalytic characterization of αLiAlO2 with the 2-propanol probe reaction revealed the formation of the condensation products methyl-cyclopentene, 4-methyl-2-pentanone, and 4-methyl-2-pentanol. These products were seen in addition to propylene and acetone. Catalytic characterization of Li1-xHxAlO2;x = 0.90 with 2-propanol showed a significant decrease in condensation activity and no change in the propylene/acetone ratio relative to αLiAlO2. This suggests that the decrease in the amount of lithium eliminated the basic sites necessary for the condensation reactions.
AB - The mechanism of cation replacement in the Li1-xHxAlO2; 0.00 ≤x ≤ 0.90 system was investigated with XRD. Examination of the peak position and intensity associated with the 018 and 110 Bragg reflections {Mathematical expression} in a series of partially replaced samples showed that the cation replacement process proceeded by a two phase mechanism. Catalytic characterization of αLiAlO2 with the 2-propanol probe reaction revealed the formation of the condensation products methyl-cyclopentene, 4-methyl-2-pentanone, and 4-methyl-2-pentanol. These products were seen in addition to propylene and acetone. Catalytic characterization of Li1-xHxAlO2;x = 0.90 with 2-propanol showed a significant decrease in condensation activity and no change in the propylene/acetone ratio relative to αLiAlO2. This suggests that the decrease in the amount of lithium eliminated the basic sites necessary for the condensation reactions.
KW - Catalysis by LiHAlO
KW - reactions of 2-propanol on LiHAlO
KW - structure of LiHAlO catalyst
UR - http://www.scopus.com/inward/record.url?scp=34249837508&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249837508&partnerID=8YFLogxK
U2 - 10.1007/BF00767196
DO - 10.1007/BF00767196
M3 - Article
AN - SCOPUS:34249837508
VL - 12
SP - 139
EP - 146
JO - Catalysis Letters
JF - Catalysis Letters
SN - 1011-372X
IS - 1-3
ER -