Synthesis of Ni@Al2O3 nanocomposite with superior activity and stability for hydrogen production from plastic-derived syngas by CO2-sorption-enhanced reforming

In last years, sorption-enhanced steam reforming of ethanol (SESRE) has become an interesting alternative for the industry, since it offers high H2 purity with a simpler and smaller system. In this study CaO derived materials were synthesized to improve multicyclic CO2 sorption-desorption stability. A dispersant and inert phase (Ca12All4O33) was incorporated into CaO structure. The effects of CaO:Ca12Al14O33 ratio on the characteristics of the new absorbents and on their performance in sorption-enhanced steam reforming of ethanol were analyzed. The results obtained indicate that the absorbent 85% CaO – 15% Ca12Al14O33 had significantly improved cyclic reaction stability. Additionally, it was proved that with this adsorbent CO purity on wet basis was lower than 2 %, making it possible to attain in only one reaction stage the CO purity obtained after de WGS reactor.

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Unexpected highly reversible topotactic CO2 sorption/desorption capacity for potassium dititanate

Journal of Materials Chemistry A ◽

10.1039/c6ta04117e ◽

2016 ◽

Vol 4 (33) ◽

pp. 12889-12896 ◽

Cited By ~ 16

Author(s):

Qianwen Zheng ◽

Liang Huang ◽

Yu Zhang ◽

Junya Wang ◽

Chen-Zi Zhao ◽

...

Keyword(s):

High Temperature ◽

Hydrogen Production ◽

Co2 Sorption ◽

Potassium Dititanate ◽

Desorption Capacity

Potassium dititanate (K2Ti2O5) was revealed to possess an unexpected, highly reversible CO2 sorption/desorption capacity at ca. 750 °C, which is promising as a high-temperature CO2 adsorbent for sorption enhanced hydrogen production (SEHP) processes.

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Hydrogen Production, Separation and Purification for Energy

10.1049/pbpo089e ◽

2017 ◽

Cited By ~ 2

Keyword(s):

Hydrogen Production ◽

Separation And Purification

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Utilization of electrical charges in the pores of tofu waste for hydrogen production in water

WEENTECH Proceedings in Energy ◽

10.32438/wpe.1720 ◽

2020 ◽

pp. 124-135

Author(s):

I. N. G. Wardana ◽

N. Willy Satrio

Keyword(s):

Magnetic Field ◽

Hydrogen Production ◽

Sodium Bicarbonate ◽

Positive Charge ◽

Electrical Energy ◽

Hydrogen Sensor ◽

Water Molecules ◽

Partial Charge ◽

Delocalized Electron ◽

Water Hydrogen

Tofu is main food in Indonesia and its waste generally pollutes the waters. This study aims to change the waste into energy by utilizing the electric charge in the pores of tofu waste to produce hydrogen in water. The tofu pore is negatively charged and the surface surrounding the pore has a positive charge. The positive and negative electric charges stretch water molecules that have a partial charge. With the addition of a 12V electrical energy during electrolysis, water breaks down into hydrogen. The test was conducted on pre-treated tofu waste suspension using oxalic acid. The hydrogen concentration was measured by a MQ-8 hydrogen sensor. The result shows that the addition of turmeric together with sodium bicarbonate to tofu waste in water, hydrogen production increased more than four times. This is due to the fact that magnetic field generated by delocalized electron in aromatic ring in turmeric energizes all electrons in the pores of tofu waste, in the sodium bicarbonate, and in water that boosts hydrogen production. At the same time the stronger partial charge in natrium bicarbonate shields the hydrogen proton from strong attraction of tofu pores. These two combined effect are very powerful for larger hydrogen production in water by tofu waste.

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