Synthesis of uranium nitride by a mechanically induced gas–solid reaction

Jaques, Brian J.; Marx, Brian M.; Hamdy, Abdel Salam; Butt, Darryl P.

doi:10.1016/j.jnucmat.2008.07.043

Cited by 21 publications

(26 citation statements)

References 21 publications

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“…Also, due to the high vapor pressures of DyN and AmN, this route offers a "closed-system" synthesis route preventing the loss of material via the evolution of the vapor. The results of this work have been published in the Journal of Nuclear Materials [91,92].…”

Section: Results Of Synthesizing Dyn Via a Direct Nitridation Synthesmentioning

confidence: 99%

“…The work presented in this report is the first that has been documented demonstrating the direct nitridation of dysprosium and cerium metal via a mechanical ball milling route [92]. This work was conducted in parallel with successful efforts to develop economical nitride synthesis methods for uranium nitride [91]. The results suggest direct nitridation of plutonium and americium as well as other actinides may be possible by this method, offering a relatively inexpensive, closed system for processing.…”

Section: Novel Reactive Milling Synthesis Route To Cenmentioning

confidence: 88%

“…The novel ballmilling and the hydride-nitride synthesis techniques that were presented in this section use pure uranium metal to form a phase pure nitride at room temperature and 320°C, respectively. It should be noted that the ball-milling route has never been demonstrated with any other lanthanide or actinide prior to this work [91,92] and is thus a novel synthesis route. The ballmilling route reduces the number of handling and processing steps thereby minimizing the time and risks associated with handling the nitrides.…”

Section: Discussion Of Uranium Nitride Synthesis Routesmentioning

confidence: 99%

“…• Carbothermically reducing UO 2 prior to nitridation at 1400°C, • Hydriding uranium metal prior to nitridation at 320°C, and • Ball-milling of uranium metal in nitrogen at room temperature [91].…”

Section: Discussion Of Uranium Nitride Synthesis Routesmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Butt¹,

Jaques²

2009

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Section: Results Of Synthesizing Dyn Via a Direct Nitridation Synthesmentioning

confidence: 99%

Section: Novel Reactive Milling Synthesis Route To Cenmentioning

confidence: 88%

Section: Discussion Of Uranium Nitride Synthesis Routesmentioning

confidence: 99%

Section: Discussion Of Uranium Nitride Synthesis Routesmentioning

confidence: 99%

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Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Butt¹,

Jaques²

2009

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“…A conventional ball milling process is one of the techniques widely used to produce powdered cellulose by mechanical shear stress and impaction. This method causes a reduction in the crystallinity of the cellulose [9][10][11]. The degree of structural disruption depends on the conditions applied, for example, the size of the balls, rotation speed of milling, and time [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Ball Milling Pretreatment of Corn Stover for Enhancing the Efficiency of Enzymatic Hydrolysis

Zhang

Huang

Zhang

et al. 2010

Appl Biochem Biotechnol

134

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Ethanol can be produced from lignocellulosic biomass with the usage of ball milling pretreatment followed by enzymatic hydrolysis and fermentation. The sugar yields from lignocellulosic feed stocks are critical parameters for ethanol production process. The research results from this paper indicated that the yields of glucose and xylose were improved by adding any of the following dilute chemical reagents: H(2)SO(4), HCl, HNO(3), CH(3)COOH, HCOOH, H(3)PO(4), and NaOH, KOH, Ca(OH)(2), NH(3)·H(2)O in the ball milling pretreatment of corn stover. The optimal enzymatic hydrolysis efficiencies were obtained under the conditions of ball milling in the alkali medium that was due to delignification. The data also demonstrated that ball milling pretreatment was a robust process. From the microscope image of ball milling-pretreated corn stover, it could be observed that the particle size of material was decreased and the fiber structure was more loosely organized. Meanwhile, the results indicate that the treatment effect of wet milling is better than that of dry milling. The optimum parameters for the milling process were ball speed of 350 r/min, solid/liquid ratio of 1:10, raw material particle size with 0.5 mm, and number of balls of 20 (steel ball, Φ = 10 mm), grinding for 30 min. In comparison with water milling process, alkaline milling treatment could increase the enzymatic hydrolysis efficiency of corn stover by 110%; and through the digestion process with the combination of xylanase and cellulase mixture, the hydrolysis efficiency could increase by 160%.

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A Novel Process for CO₂ Capture by Using Sodium Metaborate, Part II: Carbonation Reaction and Kinetic Studies

Kibar

Akın

2016

Int J of Chemical Kinetics

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In Part II of this two-part series of papers, optimization of carbonation reaction with sodium metaborate and kinetics of the reaction are studied and compared to the structural properties, which were reported in Part I. This paper presents a comprehensive study on the optimization of reaction conditions and determination of reaction parameters of sodium metaborate (NaBO 2 ) and carbon dioxide (CO 2 ). Both hydrated and dehydrated forms of NaBO 2 have high sorption capacities of CO 2 up to 400°C. Decomposition of the products starts beyond 400°C and completes at 600°C. The shrinking core model is used to explain the kinetics of the noncatalytic heterogeneous reaction. The reaction progresses in two stages: one is surface reaction controlled and the other is diffusion controlled. The apparent activation energy and preexponential factor for reaction-controlled and diffusion-controlled regions are calculated as 11.8 kJ/mol and 3.5 × 10 6 cm 2 /min and 18.2 kJ/mol and 6.5 × 10 −5 cm 2 /min, respectively.

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Synthesis of uranium nitride by a mechanically induced gas–solid reaction

Cited by 21 publications

References 21 publications

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Ball Milling Pretreatment of Corn Stover for Enhancing the Efficiency of Enzymatic Hydrolysis

A Novel Process for CO₂ Capture by Using Sodium Metaborate, Part II: Carbonation Reaction and Kinetic Studies

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Synthesis of uranium nitride by a mechanically induced gas–solid reaction

Cited by 21 publications

References 21 publications

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Synthesis and Optimization of the Sintering Kinetics of Actinide Nitrides

Ball Milling Pretreatment of Corn Stover for Enhancing the Efficiency of Enzymatic Hydrolysis

A Novel Process for CO2 Capture by Using Sodium Metaborate, Part II: Carbonation Reaction and Kinetic Studies

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A Novel Process for CO₂ Capture by Using Sodium Metaborate, Part II: Carbonation Reaction and Kinetic Studies