Mechanochemical Synthesis of Sodium Borohydride by Recycling Sodium Metaborate

Kong, Lingyan; Cui, Xiufang; Jin, Hong; Wu, Jie; Du, Hao; Xiong, Tao

doi:10.1021/ef900619y

Cited by 48 publications

(40 citation statements)

References 17 publications

(31 reference statements)

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“…NaBH 4 Regeneration via the Reaction between Mg 2 Si and NaBO 2 ·2H 2 O Via ball milling hydrated NaBO 2 and Mg, NaBH 4 was regenerated and the energy efficiency was further increased. However, the highest NaBH 4 yield by this method was 68.55%, which did not reach the general yield of regenerated NaBH 4 (~76%) [67,68]. According to Kojima et al [66], with Si added, the NaBH 4 yield was increased in the reaction between NaBO 2 and Mg under a hydrogen atmosphere.…”

Section: Nabh 4 Regeneration Via the Reaction Between Mg And Nabo 2 ·mentioning

confidence: 77%

“…Therefore, the thermochemistry method was substituted by room temperature ball milling in this reaction. Hsueh et al [67], Kong et al [68] and Çakanyildirim et al [69] used MgH2 to react with NaBO2 by ball milling under argon. All of their NaBH4 yields were over 70%, which strongly indicated that ball milling is suitable for the reaction between MgH2 and NaBO2.…”

Section: Nabh4 Regeneration Via the Reaction Between Metal Or Other Hmentioning

confidence: 99%

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A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

Ouyang

Zhong

et al. 2018

Inorganics

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NaBH 4 hydrolysis can generate pure hydrogen on demand at room temperature, but suffers from the difficult regeneration for practical application. In this work, we overview the state-of-the-art progress on the regeneration of NaBH 4 from anhydrous or hydrated NaBO 2 that is a byproduct of NaBH 4 hydrolysis. The anhydrous NaBO 2 can be regenerated effectively by MgH 2 , whereas the production of MgH 2 from Mg requires high temperature to overcome the sluggish hydrogenation kinetics. Compared to that of anhydrous NaBO 2 , using the direct hydrolysis byproduct of hydrated NaBO 2 as the starting material for regeneration exhibits significant advantages, i.e., omission of the high-temperature drying process to produce anhydrous NaBO 2 and the water included can react with chemicals like Mg or Mg 2 Si to provide hydrogen. It is worth emphasizing that NaBH 4 could be regenerated by an energy efficient method and a large-scale regeneration system may become possible in the near future.

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Section: Nabh 4 Regeneration Via the Reaction Between Mg And Nabo 2 ·mentioning

confidence: 77%

Section: Nabh4 Regeneration Via the Reaction Between Metal Or Other Hmentioning

confidence: 99%

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

Ouyang

Zhong

et al. 2018

Inorganics

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“…Moreover, the multiphysical fields can be studied by the coupled method for designing and optimizing the magnesium electrolysis cell. (2) According to the temperature distribution of the magnesium electrolysis cell, the highest temperature appeared in the electrolyte domain. A huge amount of heat was lost from anodes because the average temperature of the anode surfaces exposed to air is 251°C, which is much higher than other surfaces of the cell.…”

Section: Resultsmentioning

confidence: 99%

Coupled Thermoelectric Model and Effects of Current Fluctuation on Thermal Balance in Magnesium Electrolysis Cell

Sun

Liu

et al. 2011

Energy Fuels

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During the industrial magnesium production, the thermal balance in a magnesium electrolysis cell is the key factor for regular operations. If the thermal balance is broken, the efficiency of the regular production declines seriously because of too high or too low of a temperature in the magnesium cell. The thermal balance in the magnesium cell is determined directly by the thermal field, which is based on the electric field energy. The thermoelectric field in the magnesium cell must be studied by coupling for the high correlation between the two fields. A three-dimensional half of a full cell model was developed through the finite element analysis software to coupling study the thermoelectric field in a 120 kA magnesium electrolysis cell. Through numerical calculation, the distribution of the voltage and temperature were obtained. Moreover, the total heat generation and dissipation in the cell are influenced by the changes of the current intensity because the electric field is the source of the thermal field. When the current intensity changed, the thermal balance may be broken. To investigate the effects on the fluctuation of the current intensity that occurred in the practical production, the thermal balance in the magnesium cell was studied by changing the current intensity from 115 to 125 kA. With the changes of the current intensity, the corresponding electrolyte depth must be carried out to maintain the thermal balance. From the simulation results, the electrolyte depth has a linear relation with the current intensity on the basis of the thermal balance in the cell and the method is an efficient way to maintain the thermal balance in the cell.

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“…Use of this type of mill for MgH 2 reduction of NaBO 2 to form NaBH 4 has been described in the literature. [46,47] The planetary mill jar serves as the reaction vessel ( Figure 3.4.1b and c). During operation, the jar or "planet" spins in a horizontal plane while orbiting the "sun" on a rotating disc in the opposite direction in the ratio 1:-2 (disc revolutions: jar revolutions).…”

Section: Planetary Ball Millmentioning

confidence: 99%