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Palladium alloy hydrogen sensor

Date: 2024-09-26 15:22

Abstract: Operating principle of NPDI-H2 palladium alloy hydrogen sensor: palladium alloy thin film hydrogen sensor technology mainly uses the catalytic decomposition of metal film on gas. Hydrogen molecules are adsorbed on the surface of the alloy film. Under the catalysis of the palladium alloy film, the hydrogen molecule decomposes into two hydrogen atoms. The hydrogen atoms diffuse to the interior of the palladium alloy lattice, causing lattice expansion and phase transformation, resulting in changes in the conductivity of the alloy film. According to this characteristic principle, the measurement of hydrogen concentration can be realized.

NPDI-H2 palladium alloy Hydrogen sensor

-Hydrogen specificity

The development of the hydrogen energy industry is inseparable from hydrogen safety, which mainly depends on hydrogen sensing and detection. Hydrogen monitoring and early warning are required from hydrogen production stations, hydrogen storage stations, hydrogen transportation, hydrogen refueling stations and hydrogen consumption terminals. With the development of the hydrogen energy industry, hydrogen sensors will usher in large-scale development and popularization. According to the report of international consulting institutions, the global market of hydrogen sensors is expected to reach US $2.993 billion by 2028, of which the Asia Pacific region will account for more than 20%.

NPDI-H2 Hydrogen sensor Using the specificity of palladium alloy for hydrogen selection, hydrogen detection applications under various complex operating conditions can be realized. The sensor has the advantages of good selectivity, no cross interference, no need for oxygen to participate in the reaction, and long service life. Its unique technical advantage is that the sensor can accurately and reliably detect hydrogen in saturated water vapor, and its work is not affected by condensed water, even can withstand the immersion of liquid water. NPDI-H2 hydrogen sensor is widely used for hydrogen online process monitoring under various industrial hydrogen production conditions, such as hydrogen blending of natural gas, hydrogen production by ammonia cracking, hydrogen production from methanol to gold, etc.

Operating Principle of NPDI-H2 Palladium Alloy Hydrogen Sensor
Palladium alloy thin film hydrogen sensor technology mainly uses the catalytic decomposition of metal film on gas. Hydrogen molecules are adsorbed on the surface of the alloy film. Under the catalysis of the palladium alloy film, the hydrogen molecule decomposes into two hydrogen atoms. The hydrogen atoms diffuse to the interior of the palladium alloy lattice, causing lattice expansion and phase transformation, resulting in changes in the conductivity of the alloy film. According to this characteristic principle, the measurement of hydrogen concentration can be realized.

Features of NPDI-H2 hydrogen sensor

Good selectivity, no cross interference
Resistant to extreme environments such as high temperature and humidity
It does not require oxygen to participate in the reaction and is suitable for oxygen free detection environment
Wide measurement range, realizing full range measurement of explosion limit and even pure hydrogen
Long service life, up to 10 years

Working principle and application of hydrogen sensor

Application market

Hydrogen sensor catalytic bead principle

Thermal conductivity principle of hydrogen sensor

Principle of palladium alloy for hydrogen sensor Section three generation

petrifaction

X

X

Process gas

X

X

energy / nuclear energy

X

X

Industrial manufacturing

X

X

X

Research laboratory / university

X

X

X

semiconductor / Electronic manufacturing

X

X

transformer oil

X

fuel cell / automobile

X

X

X

Operating principle and characteristics of hydrogen sensor

characteristic

Principle of catalytic bead

Thermal conductivity principle

Chromatographic principle

Spectral principle

Principle of palladium alloy Section three generation

usability

yes

yes

yes

yes

yes

Hydrogen specificity

no

no

no

no

yes

Oxygen required O2

yes

no

no

range

2,000 PPM

~1PPM - 100%

15 PPM - 100%

response time

10 - 90 second

1-5 second

Sampling analysis

Sampling analysis

2 – 10 second

working temperature

-20 to 50°C

< 70°C

Sampling analysis

Sampling analysis

-20 to 150°C

stay CO or S Work in

no

no

yes

yes

yes

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Application market	Hydrogen sensor catalytic bead principle	Thermal conductivity principle of hydrogen sensor	Principle of palladium alloy for hydrogen sensor Section three generation
petrifaction		X	X
Process gas		X	X
energy / nuclear energy		X	X
Industrial manufacturing	X	X	X
Research laboratory / university	X	X	X
semiconductor / Electronic manufacturing		X	X
transformer oil			X
fuel cell / automobile	X	X	X

characteristic	Principle of catalytic bead	Thermal conductivity principle	Chromatographic principle	Spectral principle	Principle of palladium alloy Section three generation
usability	yes	yes	yes	yes	yes
Hydrogen specificity	no	no	no	no	yes
Oxygen required O2	yes	no			no
range	2,000 PPM	~1PPM - 100%			15 PPM - 100%
response time	10 - 90 second	1-5 second	Sampling analysis	Sampling analysis	2 – 10 second
working temperature	-20 to 50°C	< 70°C	Sampling analysis	Sampling analysis	-20 to 150°C
stay CO or S Work in	no	no	yes	yes	yes