2012
DOI: 10.1039/c2cy20150j
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Selective conversion of butane into liquid hydrocarbon fuels on alkane metathesis catalysts

Abstract: We report a selective direct conversion of n-butane into higher molecular weight alkanes (C 5+ ) by alkane metathesis reaction catalysed by silica-alumina supported tungsten or tantalum hydrides at moderate temperature and pressure. The product is unprecedented, asymmetrically distributed towards heavier alkanes.

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Cited by 28 publications
(28 citation statements)
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“…The silica-alumina supported tungsten hydride W-H/ SiO 2 -Al 2 O 3-500 XI was assessed for n-butane conversion in a continuous flow reactor (20 bar, 150 1C, 4 mL min À1 , 0.32 mol C 4 H 10 mol W À1 min À1 ). 122 After a maximal conversion of 39% at the start of reaction a gradual deactivation is observed to 14% conversion after 40 h. Contrary to the classical mechanism of alkane metathesis, where the main products expected are propane and pentane, the experiment displayed an asymmetrical product distribution toward liquid alkanes (C 5+ ), as depicted in Fig. 7.…”
Section: Bifunctional Systemsmentioning
confidence: 86%
“…The silica-alumina supported tungsten hydride W-H/ SiO 2 -Al 2 O 3-500 XI was assessed for n-butane conversion in a continuous flow reactor (20 bar, 150 1C, 4 mL min À1 , 0.32 mol C 4 H 10 mol W À1 min À1 ). 122 After a maximal conversion of 39% at the start of reaction a gradual deactivation is observed to 14% conversion after 40 h. Contrary to the classical mechanism of alkane metathesis, where the main products expected are propane and pentane, the experiment displayed an asymmetrical product distribution toward liquid alkanes (C 5+ ), as depicted in Fig. 7.…”
Section: Bifunctional Systemsmentioning
confidence: 86%
“…11 After this breakthrough various supported metal catalysts based on Ta, Mo and W have been employed for the alkane metathesis. [12][13][14][15][16][17] However, these catalytic systems showed little success in terms of efficiency, [17][18][19][20] until the recent development of silica and silica-alumina supported W(CH 3 ) 6 , which have been proved to be efficient in alkane metathesis with significantly higher TONs. 21,22 In the quest for improving the efficiency in alkane metathesis reaction, we intentionally planned to move from a mono-metallic system (tungsten) to a bimetallic system, wherein another metal should be 1) very efficient for dehydrogenation and hydrogenation reaction at 150 0 C and 2) it should not react with our parent metathesis catalyst.…”
Section: Introductionmentioning
confidence: 99%
“…1,6,7 For instance, supported Ta mono-or polyhydrides catalyze n-butane metathesis to C 1 -C 3 light hydrocarbons as well as liquid hydrocarbon fuels (C 5 -C 10 ) in a pressurized fixed-bed reactor. 8 In such a supported system, it has been observed that the initial C-H bond activation occurs on the metal hydride with hydrogen evolution. 9 Next, αor β-H elimination from the resulting alkyl species would give the corresponding carbene or olefin.…”
Section: Introductionmentioning
confidence: 99%