Investigation of Alumina Formation and Oxidation Rate of Ni–5 wt%Al–X wt%Cr Alloy Using Hydrogen Sensor and Oxygen Pump Sensor

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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Development and Evaluation of a Pt/Ti-FET-Type Hydrogen Sensor

IEEJ Transactions on Sensors and Micromachines ◽

10.1541/ieejsmas.130.407 ◽

2010 ◽

Vol 130 (8) ◽

pp. 407-411

Author(s):

Masatoshi Kariya ◽

Kouhei Mizuhara ◽

Tomiharu Yamaguchi ◽

Toshihiko Kiwa ◽

Shinsuke Kunitsugu ◽

...

Keyword(s):

Hydrogen Sensor

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Hydrogen Selectivity of a Proton-Pumping Gate FET Hydrogen Sensor in an AC Modulation Mode

IEEJ Transactions on Sensors and Micromachines ◽

10.1541/ieejsmas.129.110 ◽

2009 ◽

Vol 129 (4) ◽

pp. 110-114 ◽

Cited By ~ 1

Author(s):

Tomiharu Yamaguchi ◽

Masanori Takisawa ◽

Toshihiko Kiwa ◽

Hironobu Yamada ◽

Keiji Tsukada

Keyword(s):

Hydrogen Sensor ◽

Proton Pumping ◽

Modulation Mode ◽

Hydrogen Selectivity

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Reduction of Wind Disturbance by Optimizing the Drive Current of Pt Ultra-thin Film Hydrogen Sensor

IEEJ Transactions on Sensors and Micromachines ◽

10.1541/ieejsmas.140.92 ◽

2020 ◽

Vol 140 (4) ◽

pp. 92-96

Author(s):

Yuto Goda ◽

Hiroto Shobu ◽

Kenji Sakai ◽

Toshihiko Kiwa ◽

Kenji Kondo ◽

...

Keyword(s):

Thin Film ◽

Hydrogen Sensor ◽

Wind Disturbance ◽

Drive Current ◽

Ultra Thin Film

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Oxidation of (1-hydroxybenzyl)ferrocene and its derivatives substituted in phenyl ring with bis(triphenylsilyl) chromate

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19823375 ◽

1982 ◽

Vol 47 (12) ◽

pp. 3375-3380 ◽

Cited By ~ 1

Author(s):

Jaroslav Holeček ◽

Karel Handlíř ◽

Milan Nádvorník ◽

Milan Vlček

Keyword(s):

Linear Dependence ◽

Rate Constants ◽

Oxidation Rate ◽

Phenyl Ring ◽

Equilibrium Constants ◽

Aprotic Solvents ◽

Protonation Equilibrium ◽

Oxidation Of Alcohols ◽

Hammett Σ Constants ◽

Sulphuric Acid Medium

Kinetics have been studied of oxidation of (1-hydroxybenzyl)ferrocenes substituted in phenyl ring with bis(triphenylsilyl) chromate in benzene solutions as well as protonation of these alcohols in sulphuric acid medium. Logarithms of the oxidation rate constants (kobs, 20-40 °C) and those of the protonation equilibrium constants (KR+, 25 °C) show linear dependence on the Hammett σ constants, the ρ constant values being -0.86 to -0.40 and -2.50, respectively. These negative values suggest that the both processes are influenced by the same effects and confirm the mechanism proposed earlier for oxidation of alcohols with ferrocenyl substituent by action of bis(triphenylsilyl) chromate in aprotic solvents.

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Palladium Nanofiber Networks Hydrogen Sensor and Hydrogen-Actuated Switches

Sustainable Design and Manufacturing 2018 - Smart Innovation, Systems and Technologies ◽

10.1007/978-3-030-04290-5_12 ◽

2018 ◽

pp. 116-125 ◽

Cited By ~ 1

Author(s):

Boyi Wang ◽

Yong Zhu ◽

Vien Huynh ◽

Md. Ataur Rahman ◽

Brian Hawkett ◽

...

Keyword(s):

Hydrogen Sensor

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Modal characteristics and fluid–structure interaction vibration response of submerged impeller

Journal of Vibration and Control ◽

10.1177/10775463211003695 ◽

2021 ◽

pp. 107754632110036

Author(s):

Shihui Huo ◽

Hong Huang ◽

Daoqiong Huang ◽

Zhanyi Liu ◽

Hui Chen

Keyword(s):

Flow Field ◽

Unsteady Flow ◽

Damping Ratio ◽

Pure Water ◽

Vibration Response ◽

Modal Identification ◽

Liquid Oxygen ◽

Modal Characteristics ◽

Oxygen Pump ◽

Turbo Pump

Turbo pump is one of the elements with the most complex flow of liquid rocket engine, and as an important component of turbo pump, an impeller is the weak point affecting its reliability. In this study, a noncontact modal characteristic identification technique was proposed for the liquid oxygen pump impeller. Modal characteristics of the impeller under three different submerged media, air, pure water, and brine with same density as liquid oxygen, were tested based on the noncontact modal identification technology. Submersion state directly affects the modal frequencies and damping ratio. The transient vibration response characteristics of the impeller excited by the unsteady flow field was achieved combining with unsteady flow field analysis and transient dynamic analysis in the whole flow passage of the liquid oxygen pump. Vibration responses at different positions of the impeller show 10X and 20X frequencies, and the amplitude at the root of short blade is significant, which needs to be paid more attention in structural design and fatigue evaluation.

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