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Methane Conversions
Published in Saeed Sahebdelfar, Maryam Takht Ravanchi, Ashok Kumar Nadda, 1 Chemistry, 2022
Saeed Sahebdelfar, Maryam Takht Ravanchi, Ashok Kumar Nadda
Tiemersma et al. (2012) obtained power-law rate expressions for the reactions shown in the scheme based on simplified mechanism over a Mn/Na2WO4/SiO2 catalyst prepared by incipient wetness impregnation. For the formation of C2H6 from Eq. (4.46), orders 1 and 0.36 were obtained in partial pressure of methane and oxygen, respectively.
Mesoporous Adsorbents from Biomass: Opportunities and Challenges in Hydrothermal Treatment
Published in Tushar Kanti Sen, Air, Gas, and Water Pollution Control Using Industrial and Agricultural Solid Wastes Adsorbents, 2017
Akshay Jain, Kubilay Tekin, Madapusi P. Srinivasan
Romero-Anaya et al. (2012) reported that activation after the incipient wetness impregnation method resulted in better porosity than the activation after hydrothermal impregnation. This may be attributed to the presence of water in the hydrothermal method, which will affect the complex process (for more details refer to Romero-Anaya et al. 2012), certainly modifying the reactions. However, a definitive conclusion requires a careful, comparative study of the methods under controlled conditions.
Nanocatalysts Based in Zeolites for Environmental Applications
Published in Vanesa Calvino-Casilda, Antonio José López-Peinado, Rosa María Martín-Aranda, Elena Pérez-Mayoral, Nanocatalysis, 2019
Isabel Correia Neves, António M. Fonseca, Pier Parpot
Soares et al. (2016e) mentioned that among the bimetallic nanocatalysts modified by ion exchange and impregnation methods, those prepared by the ion exchange method provided the best catalytic results due to the better dispersion of metals throughout the structure. In the incipient wetness impregnation method, the metals impregnated on the zeolite structure provoke an obstruction of the pores as it was confirmed by the decrease of the surface area (Soares et al. 2016e).
Effect of Ni loading and impregnation method on the hydrodenitrogenation of coal tar over Ni-Mo/γ-Al2O3
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Zegang Qiu, Qiao Li, Lei Shi, Zhiqin Li, Liang Ding, Liangfu Zhao
The catalysts were prepared by the incipient wetness impregnation method. They were named and listed in Table 1. NiMo-5-co was prepared by co-impregnation method, while the others were prepared by sequence-impregnation method. The sequence-impregnation conditions were as follows: An aqueous solution of ammonium heptamolybdate was prepared and sprayed onto γ-Al2O3. Then the samples were put still at room temperature for 12 h, dried at 110°C for 12 h and calcined at 550°C for 3 h. After that, nickel nitrate was introduced by the same way. In the case of co-impregnation, a mixed aqueous solution of nickel nitrate and ammonium heptamolybdate was made by regulating pH value using ammonium water, and then it was introduced onto γ-Al2O3 following the same procedure used in the sequence-impregnation method.