Abstract
The Pd4S phase of palladium sulfide is known to be a highly selective alkyne hydrogenation catalyst at atmospheric pressure. Results presented here demonstrate that high selectivity can be retained at the elevated pressures required in industrial application. For example, in a mixed acetylene/ethylene feed, 100% conversion of acetylene was attained with a selectivity to ethylene in excess of 80% at 18 bar pressure. Similarly, almost 85% selectivity can be obtained with mixed C3 feeds containing methyl acetylene, propadiene, propylene and propane at 18 bar pressure. Using a low loaded sample (0.1 wt% Pd) it was possible to estimate the TOF to be 27 s−1. High selectivity was related to the crystal structure of Pd4S with the unique spatial arrangement thought to favour Pd atoms acting in isolation from one another. Based on these results, it is proposed that this catalyst could be a potential replacement for PdAg alloys currently used by industry.
| Original language | English |
|---|---|
| Pages (from-to) | 40-52 |
| Number of pages | 13 |
| Journal | Journal of Catalysis |
| Volume | 355 |
| Early online date | 23 Sep 2017 |
| DOIs | |
| Publication status | Published - 1 Nov 2017 |
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Keywords
- Acetylene
- High pressure
- Methyl acetylene
- Palladium sulfide
- Propadiene
- Selective hydrogenation
ASJC Scopus subject areas
- Catalysis
- Physical and Theoretical Chemistry
Cite this
Selective hydrogenation of mixed alkyne/alkene streams at elevated pressure over a palladium sulfide catalyst. / McCue, Alan J.; Guerrero-Ruiz, Antonio; Ramirez-Barria, Carolina; Rodríguez-Ramos, Inmaculada; Anderson, James A.
In: Journal of Catalysis, Vol. 355, 01.11.2017, p. 40-52.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Selective hydrogenation of mixed alkyne/alkene streams at elevated pressure over a palladium sulfide catalyst
AU - McCue, Alan J.
AU - Guerrero-Ruiz, Antonio
AU - Ramirez-Barria, Carolina
AU - Rodríguez-Ramos, Inmaculada
AU - Anderson, James A.
N1 - The support of the Spanish Government (projects CTQ2014-52956-C3-2-R and CTQ2014-52956-C3-3-R) is recognized.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - The Pd4S phase of palladium sulfide is known to be a highly selective alkyne hydrogenation catalyst at atmospheric pressure. Results presented here demonstrate that high selectivity can be retained at the elevated pressures required in industrial application. For example, in a mixed acetylene/ethylene feed, 100% conversion of acetylene was attained with a selectivity to ethylene in excess of 80% at 18 bar pressure. Similarly, almost 85% selectivity can be obtained with mixed C3 feeds containing methyl acetylene, propadiene, propylene and propane at 18 bar pressure. Using a low loaded sample (0.1 wt% Pd) it was possible to estimate the TOF to be 27 s−1. High selectivity was related to the crystal structure of Pd4S with the unique spatial arrangement thought to favour Pd atoms acting in isolation from one another. Based on these results, it is proposed that this catalyst could be a potential replacement for PdAg alloys currently used by industry.
AB - The Pd4S phase of palladium sulfide is known to be a highly selective alkyne hydrogenation catalyst at atmospheric pressure. Results presented here demonstrate that high selectivity can be retained at the elevated pressures required in industrial application. For example, in a mixed acetylene/ethylene feed, 100% conversion of acetylene was attained with a selectivity to ethylene in excess of 80% at 18 bar pressure. Similarly, almost 85% selectivity can be obtained with mixed C3 feeds containing methyl acetylene, propadiene, propylene and propane at 18 bar pressure. Using a low loaded sample (0.1 wt% Pd) it was possible to estimate the TOF to be 27 s−1. High selectivity was related to the crystal structure of Pd4S with the unique spatial arrangement thought to favour Pd atoms acting in isolation from one another. Based on these results, it is proposed that this catalyst could be a potential replacement for PdAg alloys currently used by industry.
KW - Acetylene
KW - High pressure
KW - Methyl acetylene
KW - Palladium sulfide
KW - Propadiene
KW - Selective hydrogenation
UR - http://www.scopus.com/inward/record.url?scp=85029706825&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2017.09.004
DO - 10.1016/j.jcat.2017.09.004
M3 - Article
VL - 355
SP - 40
EP - 52
JO - Journal of Catalysis
JF - Journal of Catalysis
SN - 0021-9517
ER -