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Selective, bifunctional Cu–WOx/Al2O3 catalyst for hydrodeoxygenation of fatty acids
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2019-11-27 , DOI: 10.1039/c9cy01939a Sagar Janampelli 1, 2, 3, 4 , Govind Sethia 4, 5, 6, 7, 8 , Srinivas Darbha 1, 2, 3, 4
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2019-11-27 , DOI: 10.1039/c9cy01939a Sagar Janampelli 1, 2, 3, 4 , Govind Sethia 4, 5, 6, 7, 8 , Srinivas Darbha 1, 2, 3, 4
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Selective hydrodeoxygenation of oleic acid (OA; in a batch reactor, at 300 °C, 30 bar H2 pressure, reaction time of 1 h and reactant-to-catalyst weight ratio of 2 g OA/0.2 g) forming n-octadecane in yields as high as 93% over a non-noble metal, sulfur-free, bimetallic Cu–WOx/Al2O3 catalyst is reported for the first time. Several Cu–WOx/Al2O3 compositions were prepared by a sequential wet-impregnation method and evaluated. A catalyst with 10 wt% Cu and 4 wt% W enabled the highest activity and selectivity. Upon adding WOx, the amount of moderate and strong acid sites increased and more Cu in the catalyst was in reduced electron-rich metallic (Cu0) state. The crystallite size and dispersion of Cu were little affected. WOx promoted the fatty acid hydrodeoxygenation activity of Cu. While a monometallic Cu catalyst (10Cu/Al2O3) yielded n-octadecane and n-heptadecane along with high amounts of intermediate octadecanol and octadecanal products, the bimetallic catalyst (10Cu–4WOx/Al2O3) gave mainly n-octadecane. Acidity and the high amount of reduced Cu0 species are responsible for the high catalytic hydrodeoxygenation performance of this bimetallic catalyst.
中文翻译：
选择性双功能Cu–WOx / Al2O3催化剂，用于脂肪酸加氢脱氧
油酸的选择性加氢脱氧（OA;在间歇反应器中，在300°C，30 bar H 2压力下，反应时间为1 h，反应物与催化剂的重量比为2 g OA / 0.2 g）形成正十八烷首次报道了在非贵金属，无硫，双金属的Cu-WO x / Al 2 O 3催化剂上的产率高达93％。通过连续湿法浸渍法制备了几种Cu-WO x / Al 2 O 3组合物并进行了评估。具有10 wt％的Cu和4 wt％的W的催化剂能够实现最高的活性和选择性。添加WO x后，中酸性位点和强酸性位点的数量增加，并且催化剂中更多的铜处于还原的富电子金属（Cu 0）状态。Cu的微晶尺寸和分散几乎不受影响。WO x促进了Cu的脂肪酸加氢脱氧活性。虽然单金属铜催化剂（10Cu / Al的2 ö 3）得到Ñ -octadecane和Ñ具有大量中间十八烷醇和十八烷的产品，双金属催化剂的-heptadecane沿（10Cu-4WO X / Al的2 ö 3），得到主要ñ -十八烷。酸度和大量还原的Cu 0 这两种金属是这种双金属催化剂的高催化加氢脱氧性能的原因。
更新日期：2019-11-27
中文翻译：
选择性双功能Cu–WOx / Al2O3催化剂，用于脂肪酸加氢脱氧
油酸的选择性加氢脱氧（OA;在间歇反应器中，在300°C，30 bar H 2压力下，反应时间为1 h，反应物与催化剂的重量比为2 g OA / 0.2 g）形成正十八烷首次报道了在非贵金属，无硫，双金属的Cu-WO x / Al 2 O 3催化剂上的产率高达93％。通过连续湿法浸渍法制备了几种Cu-WO x / Al 2 O 3组合物并进行了评估。具有10 wt％的Cu和4 wt％的W的催化剂能够实现最高的活性和选择性。添加WO x后，中酸性位点和强酸性位点的数量增加，并且催化剂中更多的铜处于还原的富电子金属（Cu 0）状态。Cu的微晶尺寸和分散几乎不受影响。WO x促进了Cu的脂肪酸加氢脱氧活性。虽然单金属铜催化剂（10Cu / Al的2 ö 3）得到Ñ -octadecane和Ñ具有大量中间十八烷醇和十八烷的产品，双金属催化剂的-heptadecane沿（10Cu-4WO X / Al的2 ö 3），得到主要ñ -十八烷。酸度和大量还原的Cu 0 这两种金属是这种双金属催化剂的高催化加氢脱氧性能的原因。
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