New solid oxo-rhenium and oxo-molybdenum catalysts for the deoxydehydration of glycols to olefins
New solid oxo-rhenium and oxo-molybdenum catalysts for the deoxydehydration of glycols to olefins
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用于二醇脱氧脱水生成烯烃的新型固体氧代铼和氧代钼催化剂
DOI:
10.1016/j.cattod.2017.05.090
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发表时间:
2018
期刊:
影响因子:
5.3
通讯作者:
Nicholas, Kenneth M.
中科院分区:
文献类型:
--
作者:
Sharkey, Bryan E.;Denning, Alana L.;Jentoft, Friederike C.;Gangadhara, Raju;Gopaladasu, Tirupathi V.;Nicholas, Kenneth M.
Several new solid oxo-rhenium and oxo-molybdenum catalysts were tested for the deoxydehydration (DODH) of 1,2-diols to terminal olefins employing aromatic solvents and reaction temperatures of 150–200 °C. A catecholato oxo-rhenium catalyst tethered to silica was prepared and found to have comparably high DODH activity to its soluble analog with triphenylphosphine as the reductant. Catalyst re-use and leach-test experiments show significant leaching into the liquid phase. Silica, ceria and, for the first time, alumina and iron oxide were tested as supports for perrhenate, with ceria producing the least active material in 1,2-decane diol DODH. Decene yields obtained with ReOx/SiO2, ReOx/Fe2O3, ReOx/Al2O3were highest when triphenylphosphine was the reductant and reached 70 − 78% (at 90–100% conversion) at 150 °C. These three catalysts were also effective with gaseous reductants H2or CO. Leaching of rhenium species occurred for all supports and was most pronounced for SiO2. New solid oxo-molybdenum catalysts were synthesized. At 200 °C, decene yields observed using MoOx/Fe2O3, MoOx/SiO2, MoOx/Al2O3, MoOx/TiO2and MoOx/ZrO2were comparable and did not exceed 20%. There were homogeneous contributions through leached molybdenum species.
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DOI:
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发表时间:
1980
期刊:
影响因子:
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作者:
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DOI:
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发表时间:
1998
期刊:
影响因子:
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作者:
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