Carbothermic reduction of nickel oxide

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Bakhshandeh Sahar; SETOUDEH NADER; Askari Zamani Mohamad Ali; Mohassel Abbas

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Journal: Journal of Advanced Processes in Materials Engineering Year:2019 | Volume:13 | Issue:2 (49) Page(s): 63-75

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Title

Carbothermic reduction of nickel oxide

Author(s)

Bakhshandeh Sahar | SETOUDEH NADER | Askari Zamani Mohamad Ali | Mohassel Abbas | Issue Writer Certificate

Keywords

Ball MillingQ2

Boudouard ReactionQ2

Mechanical ActivationQ1

Thermal Gravimetric AnalysisQ2

Abstract

Mixtures of nickel oxide and activated carbon (99% carbon) with stiochiometric ratio were milled for different times in a planetary ball mill. The stiochiometric ratio of mixture was prepared in an un-milled condition. The unmilled mixture and milled samples were subjected to thermogravimetric analysis (TGA) under an argon atmosphere and their solid products of the reduction reaction were studied using XRD experiments. TGA showed that the reduction of NiO started at ~800℃ and ~720℃ in un-milled and one-hour milled samples respectively whilst after 25 h milling it decreased to about 430℃ . Increasing the amount of carbon more than stiochiometric ratio did not effect on the kinetics of carbothermic reduction. Thermodynamics assessments for NiO-C system were done using HSC software. Thermodynamics assessment and the experimental results indicated that Boudouard Reaction plays a significant role in the carbothermic reduction reaction of nickel oxide. The results revealed that formation and increasing of monoxide carbon gas (COg) can change the kinetic reaction mechanism into solid-gas mechanism which has the major effect on increasing the rate of reaction. The decrease in the particle size/crystallite size of the nickel oxide in the milled samples not only resulted in decreasing in the reaction temperature, but also resulted in formation of fine particles of metallic nickel. Therefore, it is possible to achieve the metallic nickel particle in the range of submicron or nanometer via carbothermic reduction reaction of NiO using Mechanical Activation of NiO-C mixture.

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APA: Copy

Bakhshandeh, Sahar, SETOUDEH, NADER, Askari Zamani, Mohamad Ali, & Mohassel, Abbas. (2019). Carbothermic reduction of nickel oxide. ADVANCED PROCESSES IN MATERIALS, 13(2 (49) ), 63-75. SID. https://sid.ir/paper/172649/en

Vancouver: Copy

Bakhshandeh Sahar, SETOUDEH NADER, Askari Zamani Mohamad Ali, Mohassel Abbas. Carbothermic reduction of nickel oxide. ADVANCED PROCESSES IN MATERIALS[Internet]. 2019;13(2 (49) ):63-75. Available from: https://sid.ir/paper/172649/en

IEEE: Copy

Sahar Bakhshandeh, NADER SETOUDEH, Mohamad Ali Askari Zamani, and Abbas Mohassel, “Carbothermic reduction of nickel oxide,” ADVANCED PROCESSES IN MATERIALS, vol. 13, no. 2 (49) , pp. 63–75, 2019, [Online]. Available: https://sid.ir/paper/172649/en

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