The Experts below are selected from a list of 37977 Experts worldwide ranked by ideXlab platform
Xiangguang Yang - One of the best experts on this subject based on the ideXlab platform.
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rare earth pyrophosphates effective Catalysts for the production of acrolein from vapor phase dehydration of glycerol
Catalysis Letters, 2009Co-Authors: Qingbo Liu, Zhen Zhang, Ying Du, Jing Li, Xiangguang YangAbstract:Vapor-phase dehydration of glycerol to produce acrolein was investigated at 320 °C over rare earth (including La, Ce, Nd, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb, Lu) pyrophosphates, which were prepared by precipitation method. The most promising Catalysts were characterized by means of XRD, FT-IR, TG-DTA, BET and NH3-TPD measurements. The excellent catalytic performance of rare earth pyrophosphate depends on the appropriate surface acidity which can be obtained by the control of pH value in the precipitation and the calcination temperature, e.g. Nd4(P2O7)3 precipitated at pH = 6 and calcined at 500 °C in the Catalyst Preparation.
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rare earth pyrophosphates effective Catalysts for the production of acrolein from vapor phase dehydration of glycerol
Catalysis Letters, 2009Co-Authors: Zhen Zhang, Ying Du, Jing Li, Xiangguang YangAbstract:Vapor-phase dehydration of glycerol to produce acrolein was investigated at 320 A degrees C over rare earth (including La, Ce, Nd, Sm, Eu, Gd, Tb, Ho, Er, Tm, Yb, Lu) pyrophosphates, which were prepared by precipitation method. The most promising Catalysts were characterized by means of XRD, FT-IR, TG-DTA, BET and NH3-TPD measurements. The excellent catalytic performance of rare earth pyrophosphate depends on the appropriate surface acidity which can be obtained by the control of pH value in the precipitation and the calcination temperature, e.g. Nd-4(P2O7)(3) precipitated at pH = 6 and calcined at 500 A degrees C in the Catalyst Preparation.
Guangsheng Gu - One of the best experts on this subject based on the ideXlab platform.
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the large scale production of carbon nanotubes in a nano agglomerate fluidized bed reactor
Chemical Physics Letters, 2002Co-Authors: Yao Wang, Hao Yu, Guangsheng GuAbstract:Carbon nanotubes (CNTs) produced by catalytic chemical vapor deposition (CCVD) can be formed into loose agglomerates that can be fluidized during the growth process. This provides a way to prepare high-quality CNTs on a large scale at low cost in a nano-agglomerate fluidized-bed reactor (NAFBR). With the present fluidized-bed reactor design and Catalyst Preparation, 50 kg/day of carbon materials was synthesized, and a high yield of 70–80% CNTs was obtained. Fluidization characteristics distinctive to CNT growth in a fluidized-bed reactor are discussed.
Sushil Adhikari - One of the best experts on this subject based on the ideXlab platform.
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Current status of hydrogen production techniques by steam reforming of ethanol: A review
Energy and Fuels, 2005Co-Authors: Agus Haryanto, Sandun Fernando, Naveen Murali, Sushil AdhikariAbstract:Hydrogen is considered to be the most viable energy carrier for the future. Producing hydrogen from ethanol steam reforming would not only be environmentally friendly but also would open new opportunities for utilization of renewable resources, which are globally available. This paper reviews the current state of the steam reforming process of ethanol, examines different Catalysts, and, finally, makes a comparative analysis. Different Catalysts have been used for the steam reforming of ethanol. Depending on the type of Catalysts, reaction conditions, and the Catalyst Preparation method, ethanol conversion and hydrogen production vary greatly. It was observed that Co/ZnO, ZnO, Rh/Al2O3, RIVCeO2, and Ni/La2O3-Al2O3 performed the best, in regard to the steam reforming of ethanol. Currently, hydrogen production from ethanol steam reforming is still in the research and development stage.
Yasuhiro Iwasawa - One of the best experts on this subject based on the ideXlab platform.
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immobilized metal ion containing ionic liquids Preparation structure and catalytic performances in kharasch addition reaction and suzuki cross coupling reactions
Journal of Molecular Catalysis A-chemical, 2008Co-Authors: Takehiko Sasaki, Mizuki Tada, Chongmin Zhong, Takao Kume, Yasuhiro IwasawaAbstract:Abstract A series of immobilized metal ion-containing ionic liquids on silica surfaces (ImmM_IL) were prepared and characterized by EXAFS, UV–vis, TGA, and elemental analysis. The prepared ImmCu2+_IL was found to be more active than unsupported [Bmim]2CuCl4 ionic liquid and reusable for Kharasch addition reaction between CCl4 and styrene. The prepared ImmPd2+_IL was active and reusable for Suzuki cross-coupling between phenylboronic acid and arylhalide. Throughout this study the present Catalyst Preparation method was confirmed to give efficient and reusable Catalysts.
Zhiyong Bai - One of the best experts on this subject based on the ideXlab platform.
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catalytic ozonation of sulfamethazine antibiotics using ce0 1fe0 9ooh Catalyst Preparation and performance
Chemosphere, 2016Co-Authors: Zhiyong Bai, Qi Yang, Jianlong WangAbstract:Iron oxyhydroxides (FeOOH) are common crystalline forms of iron which play an important role in catalysis through a series of reduction-oxidation reactions. In this paper, Ce substituted goethite (Ce0.1Fe0.9OOH) was prepared by isomorphous substitution method, characterized by XRD, SEM, TEM-EDS, FTIR, and used for the catalytic ozonation of sulfamethazine (SMT). The results showed that the Catalyst can significantly enhance the mineralization of SMT, and more than 42.1% SMT were mineralized in the presence of the Catalyst, which is 1.74 times higher than ozonation alone. Moreover, with addition of Catalyst, more ozone was dissolved into solution. The solution pH decreased due to small-molecule organic acids formation. The catalytic activity decreased slightly during the repeated batch experiments, due to the corrosion of the Catalyst and the adsorption of the residual intermediates on the Catalyst surface.