The Experts below are selected from a list of 157200 Experts worldwide ranked by ideXlab platform
Hero J Heeres - One of the best experts on this subject based on the ideXlab platform.
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hydrotreatment of the carbohydrate rich fraction of pyrolysis liquids using bimetallic ni based Catalyst Catalyst Activity and product property relations
Fuel Processing Technology, 2018Co-Authors: R H Venderbosch, Maria V Alekseeva, Monique Bernardes Figueiredo, Hans Heeres, S A Khromova, V A Yakovlev, C Cannilla, G Bonura, F Frusteri, Hero J HeeresAbstract:Abstract The use of novel nickel based Catalysts for the catalytic hydrotreatment of pyrolytic sugars, the carbohydrate-rich fraction of pine derived pyrolysis liquids, is reported. The Catalysts are characterized by a high nickel loading (38 to 57 wt%), promoted by Cu, Pd, and/or Mo and a SiO2 based inorganic matrix. Experiments were carried out at 180 °C and 120 bar initial hydrogen pressure (room temperature) in a batch reactor set-up to gain insight in Catalyst Activity and product properties as a function of the Catalyst composition. The most promising Catalyst in terms of Activity, as measured by the hydrogen uptake during reaction, was the Ni-Mo/SiO2-Al2O3 Catalyst whereas the performance of the monometallic Ni/SiO2-Al2O3 Catalyst was the lowest. As a result, the product oil obtained by the bimetallic Ni-Mo Catalyst showed the highest H/C ratio and the lowest molecular weight of all Catalysts tested. A detailed Catalyst characterization study revealed that addition of Mo to the Ni Catalyst suppresses the agglomeration of nickel nanoparticles during the catalytic hydrotreatment reaction.
R H Venderbosch - One of the best experts on this subject based on the ideXlab platform.
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hydrotreatment of the carbohydrate rich fraction of pyrolysis liquids using bimetallic ni based Catalyst Catalyst Activity and product property relations
Fuel Processing Technology, 2018Co-Authors: R H Venderbosch, Maria V Alekseeva, Monique Bernardes Figueiredo, Hans Heeres, S A Khromova, V A Yakovlev, C Cannilla, G Bonura, F Frusteri, Hero J HeeresAbstract:Abstract The use of novel nickel based Catalysts for the catalytic hydrotreatment of pyrolytic sugars, the carbohydrate-rich fraction of pine derived pyrolysis liquids, is reported. The Catalysts are characterized by a high nickel loading (38 to 57 wt%), promoted by Cu, Pd, and/or Mo and a SiO2 based inorganic matrix. Experiments were carried out at 180 °C and 120 bar initial hydrogen pressure (room temperature) in a batch reactor set-up to gain insight in Catalyst Activity and product properties as a function of the Catalyst composition. The most promising Catalyst in terms of Activity, as measured by the hydrogen uptake during reaction, was the Ni-Mo/SiO2-Al2O3 Catalyst whereas the performance of the monometallic Ni/SiO2-Al2O3 Catalyst was the lowest. As a result, the product oil obtained by the bimetallic Ni-Mo Catalyst showed the highest H/C ratio and the lowest molecular weight of all Catalysts tested. A detailed Catalyst characterization study revealed that addition of Mo to the Ni Catalyst suppresses the agglomeration of nickel nanoparticles during the catalytic hydrotreatment reaction.
Sumio Iijima - One of the best experts on this subject based on the ideXlab platform.
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84 Catalyst Activity of water assisted growth of single walled carbon nanotube forest characterization by a statistical and macroscopic approach
Journal of Physical Chemistry B, 2006Co-Authors: Don N Futaba, Kenji Hata, Tatsunori Namai, Takeo Yamada, Kohei Mizuno, Yuhei Hayamizu, Motoo Yumura, Sumio IijimaAbstract:We propose a statistical and macroscopic analysis to estimate the Catalyst Activity of water-assisted growth (super-growth) of single-walled nanotubes (SWNT) and to characterize SWNT forests. The Catalyst Activity was estimated to be 84% (±6%), the highest ever reported. The SWNT forest was found to be a very sparse material where SWNTs represent only 3.6% of the total volume. This structural sparseness is believed to play a critical role in achieving highly efficient growth.
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kinetics of water assisted single walled carbon nanotube synthesis revealed by a time evolution analysis
Physical Review Letters, 2005Co-Authors: Don N Futaba, Kenji Hata, Takeo Yamada, Kohei Mizuno, Motoo Yumura, Sumio IijimaAbstract:Here we investigate the kinetics of water-assisted CVD (henceforth denoted as supergrowth CVD) by a quantitative time-evolution analysis based on a simple growth model. We found that the supergrowth can be well described by a model where the dynamics of the Catalyst Activity is treated similar to radioactive decay. An in-depth analysis based on this growth model revealed the kinetics of the supergrowth CVD, showing a scale relationship between the carbon source and water, and elucidated the role of water as a Catalyst Activity enhancer and preserver.
Jarrid A Wittkopf - One of the best experts on this subject based on the ideXlab platform.
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Activity targets for nanostructured platinum group metal free Catalysts in hydroxide exchange membrane fuel cells
Nature Nanotechnology, 2016Co-Authors: Brian P Setzler, Zhongbin Zhuang, Jarrid A WittkopfAbstract:This Perspective establishes Catalyst Activity targets for hydroxide exchange membrane fuel cells and discusses advantages and research needs of this technology.
F Frusteri - One of the best experts on this subject based on the ideXlab platform.
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hydrotreatment of the carbohydrate rich fraction of pyrolysis liquids using bimetallic ni based Catalyst Catalyst Activity and product property relations
Fuel Processing Technology, 2018Co-Authors: R H Venderbosch, Maria V Alekseeva, Monique Bernardes Figueiredo, Hans Heeres, S A Khromova, V A Yakovlev, C Cannilla, G Bonura, F Frusteri, Hero J HeeresAbstract:Abstract The use of novel nickel based Catalysts for the catalytic hydrotreatment of pyrolytic sugars, the carbohydrate-rich fraction of pine derived pyrolysis liquids, is reported. The Catalysts are characterized by a high nickel loading (38 to 57 wt%), promoted by Cu, Pd, and/or Mo and a SiO2 based inorganic matrix. Experiments were carried out at 180 °C and 120 bar initial hydrogen pressure (room temperature) in a batch reactor set-up to gain insight in Catalyst Activity and product properties as a function of the Catalyst composition. The most promising Catalyst in terms of Activity, as measured by the hydrogen uptake during reaction, was the Ni-Mo/SiO2-Al2O3 Catalyst whereas the performance of the monometallic Ni/SiO2-Al2O3 Catalyst was the lowest. As a result, the product oil obtained by the bimetallic Ni-Mo Catalyst showed the highest H/C ratio and the lowest molecular weight of all Catalysts tested. A detailed Catalyst characterization study revealed that addition of Mo to the Ni Catalyst suppresses the agglomeration of nickel nanoparticles during the catalytic hydrotreatment reaction.