Chemical Precipitation Method for the Synthesis of Nb&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;5&lt;/sub&gt; Modified Bulk Nickel Catalysts with High Specific Surface Area

Li, Chuang; Jin, Shaohua; Guan, Weixiang; Tsang, Chi‐Wing; Chu, Wing‐Kin; Lau, Wai Kin; Liang, Changhai

doi:10.3791/56987

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…Primarily there are three methods employed for the production process, namely (i) spinning, (ii) spraying, and (iii) surface melting [81]. Afonso et al [87] utilized the spray forming process to produce NC aluminum alloys with 5 wt. % of nickel.…”

Section: Rapid Solidificationmentioning

confidence: 99%

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Nanocrystalline Materials: Synthesis, Characterization, Properties, and Applications

et al. 2021

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Nanostructuring is a commonly employed method of obtaining superior mechanical properties in metals and alloys. Compared to conventional polycrystalline counterparts, nanostructuring can provide remarkable improvements in yield strength, toughness, fatigue life, corrosion resistance, and hardness, which is attributed to the nano grain size. In this review paper, the current state-of-the-art of synthesis methods of nanocrystalline (NC) materials such as rapid solidification, chemical precipitation, chemical vapor deposition, and mechanical alloying, including high-energy ball milling (HEBM) and cryomilling was elucidated. More specifically, the effect of various process parameters on mechanical properties and microstructural features were explained for a broad range of engineering materials. This study also explains the mechanism of grain strengthening using the Hall-Petch relation and illustrates the effects of post-processing on the grain size and subsequently their properties. This review also reports the applications, challenges, and future scope for the NC materials.

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Section: Rapid Solidificationmentioning

confidence: 99%

“…Due to this chemical reaction, the metals ions in the solution precipitate completely, resulting in a higher yield of NC powder. This method is primarily used to produce particles with NC grains with larger surface areas [87]. In this method, an ionic metal solution is treated with chemicals to precipitate the metallic ions.…”

Section: Chemical Precipitationmentioning

confidence: 99%

Nanocrystalline Materials: Synthesis, Characterization, Properties, and Applications

et al. 2021

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“…In our team's effort to convert lignin to fuels in the gasoline range, we have developed a series of catalysts which can convert lignin and lignin-derived model chemicals into the gasoline fuel range [55][56][57][58][59]. The "dropin biofuels" concept by fermentation of lignocellulosic biomass to bio-fuels with less oxygen contents and higher energy density is another attractive option compared to ethanol [60,61], however the production cost and technical hurdles could be much higher.…”

Section: Introductionmentioning

confidence: 99%

Economic feasibility of gasoline production from lignocellulosic wastes in Hong Kong

Guan

Chua²,

Tsang³

et al. 2019

BMC Chem Eng

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In this study, the conceptual process flowsheet was developed and the economic feasibility of woody biomass conversion to biofuel as feedstock was analysed by considering several promising experimental processes for lignin depolymerization, such as hydrodeoxygenation and hydrogenolysis, along with lignocellulosic biomass fractionation processes. The engineering simulation process toward the commercial production of bio-gasoline from lignocellulosic biomass using SuperPro Designer® was modeled. The compatibility of the end products with the current gasoline specifications was evaluated and various blending options were investigated to meet the octane number and Reid vapor pressure requirement of the product. The economic potential of the simulated engineering process was then evaluated from an economic perspective. The operating costs and capital investment of three scenario using three different catalytic systems were estimated and discussed to assess of the potential of commercializing of woody biomass valorization process. The main potential market segments were identified, including the process by-products such as xylose and cellulose pulp. From the economic evaluation study, it was found that selling the biomass fractionation products alone does have a greater profit than valorization of lignin to produce bio-gasoline, with net present value of RMB 22,653,000 and RMB 177,000, respectively at the same return on investment if the plant is set up in Hong Kong. It was also found that catalysts play a pivotal role in determination of the profitability in the valorization process, not only because of the price of the catalyst, but also the product distributions obtained with various types of it. To obtain the same gross profit, the sale price of biogasoline has to be set higher with platinum catalysts than with ruthenium catalysts (nearly 10 folds). Thus, catalyst development and process improvement are crucial in the establishment of bio-based circular economy.

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Synthesis strategies of smart 3D nanoarchitectures and their applications in energy storage and conversion

Loura,

Mor,

Nandal

et al. 2024

Energy Storage

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The creation of effective and clean energy storage technologies has advanced dramatically due to growing worldwide worries over the depletion of fossil fuels and environmental issues. Energy storage and conversion systems have emerged as a crucial component with the development of numerous electronic devices, enabling the devices to function for extended periods of time. Due to their enormous surface area, strong electrical conductivity, and ion transport, 3D self‐supported nanoarchitectures associated with electrochemical energy storage (EES) devices can offer alternatives for enhancing the performance and advancement of existing EES systems. Here, we present the results of our findings regarding the design, production, and use of self‐supported 3D nanostructures in energy storage and conversion systems such as supercapacitors, batteries, solar cells, and fuel cells. A variety of advanced 3D nanomaterials may be readily created on an immense scale using various synthetic techniques, and they have a great deal of potential for use as electrodes in energy storage and conversion devices with much better performance. These fabrication techniques include electrochemical deposition, electrospinning, chemical precipitation, spray pyrolysis, sol‐gel method, hydrothermal method, chemical vapor deposition, and so forth.

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Chemical Precipitation Method for the Synthesis of Nb<sub>2</sub>O<sub>5</sub> Modified Bulk Nickel Catalysts with High Specific Surface Area

Cited by 5 publications

References 27 publications

Nanocrystalline Materials: Synthesis, Characterization, Properties, and Applications

Nanocrystalline Materials: Synthesis, Characterization, Properties, and Applications

Economic feasibility of gasoline production from lignocellulosic wastes in Hong Kong

Synthesis strategies of smart 3D nanoarchitectures and their applications in energy storage and conversion

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