“…It can be clearly observed that the acetylene conversion was only 90% at 100°C, indicating that a low temperature is not conducive to the conversion. This result corresponds to that in previous literature [32,34]. Figure 6.( a , c , e ) Acetylene conversion and ( b , d , f ) ethylene selectivity; optimization of ( a , b ) GHSV, ( c , d ) V(H 2 ):V(C 2 H 2 ) and ( e , f ) reaction temperature.…”
Section: Resultssupporting
confidence: 89%
“…It can be clearly observed that the acetylene conversion was only 90% at 100°C, indicating that a low temperature is not conducive to the conversion. This result corresponds to that in previous literature [32,34].…”
Section: Optimization Of Reaction Conditionssupporting
confidence: 93%
“…Figure 6c,d presents the optimization of the volume ratio of C 2 H 2 and H 2 . We found that by increasing the volume ratio, the C 2 H 2 conversion decreased, which is consistent with the literature [34]. Figure 6e,f shows the screening of the reaction temperature.…”
Section: Optimization Of Reaction Conditionssupporting
This study aims to produce ethylene using the calcium carbide route, acetylene from calcium carbide and then selective hydrogenation of the high-concentration acetylene to ethylene. A series of catalysts with different supports, such as Al2O3, SiO2 and MCM-41, were prepared using the ethylene glycol reduction method and their catalytic properties for high-concentration acetylene hydrogenation of calcium carbide to ethylene were studied by transmission electron microscopy, X-ray powder diffraction and thermogravimetry, among others. The results show that the small particle size and uniform dispersion of palladium (Pd) particles in the Pd/MCM-41 catalyst produced the highest ethylene yield of 62.09%. Then, the conditions for the basic reaction, such as reaction temperature and space velocity, were optimized using MCM-41 as a support. The yield of ethylene after condition optimization was as high as 82.87%, while the loading of Pd was 0.1%.
“…It can be clearly observed that the acetylene conversion was only 90% at 100°C, indicating that a low temperature is not conducive to the conversion. This result corresponds to that in previous literature [32,34]. Figure 6.( a , c , e ) Acetylene conversion and ( b , d , f ) ethylene selectivity; optimization of ( a , b ) GHSV, ( c , d ) V(H 2 ):V(C 2 H 2 ) and ( e , f ) reaction temperature.…”
Section: Resultssupporting
confidence: 89%
“…It can be clearly observed that the acetylene conversion was only 90% at 100°C, indicating that a low temperature is not conducive to the conversion. This result corresponds to that in previous literature [32,34].…”
Section: Optimization Of Reaction Conditionssupporting
confidence: 93%
“…Figure 6c,d presents the optimization of the volume ratio of C 2 H 2 and H 2 . We found that by increasing the volume ratio, the C 2 H 2 conversion decreased, which is consistent with the literature [34]. Figure 6e,f shows the screening of the reaction temperature.…”
Section: Optimization Of Reaction Conditionssupporting
This study aims to produce ethylene using the calcium carbide route, acetylene from calcium carbide and then selective hydrogenation of the high-concentration acetylene to ethylene. A series of catalysts with different supports, such as Al2O3, SiO2 and MCM-41, were prepared using the ethylene glycol reduction method and their catalytic properties for high-concentration acetylene hydrogenation of calcium carbide to ethylene were studied by transmission electron microscopy, X-ray powder diffraction and thermogravimetry, among others. The results show that the small particle size and uniform dispersion of palladium (Pd) particles in the Pd/MCM-41 catalyst produced the highest ethylene yield of 62.09%. Then, the conditions for the basic reaction, such as reaction temperature and space velocity, were optimized using MCM-41 as a support. The yield of ethylene after condition optimization was as high as 82.87%, while the loading of Pd was 0.1%.
“…5(B)), which is consistent with the literature. 31,32 Considering the stability of the catalyst and the ethylene selectivity, we optimized the hydrogen/acetylene ratio with a space velocity of 8000 mL g À1 h À1 . Fig.…”
Section: Optimization Of Ni Content and Reaction Conditionsmentioning
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