Hydrogen production via hydrolysis of Mg-oxide composites

Huang, Minghong; Ouyang, Liuzhang; Chen, Zhiling; Peng, Chenghong; Zhu, Xiaoke; Zhu, Min

doi:10.1016/j.ijhydene.2016.12.099

Cited by 135 publications

(34 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[8] In recent years, main methods for producing hydrogen mainly include electrolytic water decomposition, [9] photocatalytic water decomposition, [10] biological fermentation [11] and hydrolysis. [12] The hydrolysis of metals, metal hydrides [13][14][15] or borohydrides [16][17][18] shows a stable reaction, pollution-free, high hydrogen production rate and high hydrogen purity, which promote the hydrolysis as a very promising hydrogen production method. [19] Among metal borohydrides, sodium borohydride (NaBH 4 ) has high hydrogen producing capacity (about 21.2 wt.%, without water included), but the hydrolysis kinetics of NaBH 4 in pure water is sluggish, and expensive catalysts are required.…”

Section: Introductionmentioning

confidence: 99%

“…[22,26] During ball milling process, adding metal hydride/salt composite/metal oxide can refine samples [27] to improve kinetic. [12,28,29] During hydrolysis reaction, the dissolved hydroxides product [30] can weaken the continuity of the Mg(OH) 2 passivation layer; catalysts can lower the activation energy and form a microgalvanic cell with magnesium to accelerate corrosion; [13,31] the introduction of solution ions may destroy the formation of Mg (OH) 2 passivation layer. [32,33] The hydrolysis kinetics and hydrogen yield of the Mg-based alloy hydrides still needs to be improved.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

et al. 2019

Self Cite

View full text Add to dashboard Cite

Theoretically, the hydrolysis of MgLi and MgH 2 À LiH can produce 9.6 and 17.5 wt.% hydrogen (water is not included in the calculation), respectively. The ball-milling method is commonly used to refine the particle size and thus may improve hydrolysis kinetics. However, Mg and Li will be easily agglomerated, which means that direct ball-milling could not refine MgLi. In this work, we introduced 10 wt.% expanded graphite into the ballmilling process to synthesize refined MgLi alloy samples. Further studies showed that MgLi-10 wt.% expanded graphite can produce 966 mL/g hydrogen within 3 min in 0.5 M MgCl 2 solution. The MgLi hydrides were synthesized by reactive ball milling under 3 MPa H 2 and their hydrolysis performance was investigated. Moreover, the sawed powder was milled in 3 MPa H 2 for 6 h and then hydrogenated in 3 MPa H 2 at 380°C; it can produce 1542 and 1773 mL/g (15.8 wt.%) hydrogen in 5 and 30 min with mild kinetics, respectively, and the activation energy of the hydrolysis reaction is 24.6 kJ/mol in 1 M MgCl 2 solution. The findings here open a new avenue to the development of refined MgLi alloys and hydrides for hydrogen generation through a controllable hydrolysis process.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…From the results obtained, the enhancement effect on hydrolysis properties of Mg was ordered as follows: MoO 3

>

Fe 2 O 3

>

Fe 2 O 4

>

TiO 2

>

Nb 2 O 2

>

CaO.…”

Section: Introductionmentioning

confidence: 95%

Decomposition of Methane to Carbon and Hydrogen: A Catalytic Perspective

Musamali

Isa

2019

Energy Tech

View full text Add to dashboard Cite

Catalytic decomposition of methane is a viable method of producing hydrogen and carbon nanomaterials. Hydrogen gas is mainly used as a reactant in the chemical industry, i.e., petrochemicals, glass, and pharmaceutical industries, whereas carbon may be used in direct carbon fuel cells or marketed as a filamentous carbon. Demand for carbon monoxide (CO)–free hydrogen continues to rise due to the increase in the number of its applications. Currently, a significant amount of hydrogen comes from gasification of natural gas, oxidation, and steam reforming of hydrocarbons. In all these technologies, CO is formed as a by‐product that requires tedious and costly processes to separate hydrogen from syngas. Herein, the recent literature on methane decomposition, methane reaction kinetics, catalyst performance, hydrogen yield, and formation of carbon nanomaterial are reviewed. The scope of this work is limited to direct conversion of methane into carbon and hydrogen; therefore, processes involving synthesis gas as intermediate products are not covered. Finally, catalysts that are often used in methane decomposition, their deactivation, and regeneration are discussed with the aim of documenting the foundation upon which an entirely new class of catalysts can be built to enhance their activity, selectivity, and yield.

show abstract

“…Among the emerging numerous energies (solar energy, wind energy, water energy, etc), hydrogen energy is considered to be an alternative for fossil fuels for its wide range of sources, high energy storage density, recyclability, and environment friendly. [11][12][13] Nowadays, hydrogen can be obtained by various ways, [14][15][16] such as electrocatalytic hydrogen generation, 14 photocatalytic hydrogen generation, 17,18 hydrolysis hydrogen generation, 6,[19][20][21][22][23] biomass hydrogen generation, 24,25 and gas-reforming hydrogen generation. Among the three aspects, the hydrogen production technique is the primary task.…”

Section: Introductionmentioning

confidence: 99%

Catalytic effect of EG and MoS ₂ on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance

Hou

Wang

et al. 2019

Int J Energy Res

View full text Add to dashboard Cite

Summary In this study, the metallurgical melting Mg‐10wt.%Ni (Mg10Ni) alloy is firstly modified by high‐energy ball milling (HEBM) and then surface catalysts expanded graphite (EG) or MoS2 or EG‐MoS2 are introduced to prepare Mg10Ni‐M (M = EG, MoS2, and EG‐MoS2) composites. The effects of surface catalysts on hydrolysis hydrogen generation of HEBM Mg10Ni alloy are comprehensively investigated. Their kinetics, rate‐limiting steps, and apparent activation energies are investigated by fitting the hydrolysis curves at different temperatures. The results indicate that the total hydrogen generation capacities of prepared Mg10Ni‐M (M = EG, MoS2, and EG‐MoS2) composites are 200, 170, 674, and 720 mL·g−1 within 1 minute at 291 K. The capacity and yield of Mg10Ni are 500 mL·g−1 and 56% within 15 minutes. The surface catalysts EG or MoS2 or EG‐MoS2 can distinctly elevate the initial H2 produce rate and promote the complete hydrolysis process. The highest capacity and generation yield within 15 minutes are 740.8 mL·g−1 and 91% obtained by HEBM Mg10Ni‐EG‐MoS2 composite at 291 K. The surface catalysis can promote high generation yield of Mg10Ni alloy in a short time.

show abstract

Hydrogen production via hydrolysis of Mg-oxide composites

Cited by 135 publications

References 42 publications

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

Decomposition of Methane to Carbon and Hydrogen: A Catalytic Perspective

Catalytic effect of EG and MoS ₂ on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance

Contact Info

Product

Resources

About

Hydrogen production via hydrolysis of Mg-oxide composites

Cited by 135 publications

References 42 publications

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

Decomposition of Methane to Carbon and Hydrogen: A Catalytic Perspective

Catalytic effect of EG and MoS 2 on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance

Contact Info

Product

Resources

About

Catalytic effect of EG and MoS ₂ on hydrolysis hydrogen generation behavior of high‐energy ball‐milled Mg‐10wt.%Ni alloys in NaCl solution—A powerful strategy for superior hydrogen generation performance