Unlock instant, AI-driven research and patent intelligence for your innovation.

Hydrogen containing industrial waste gas separation and purification method

A technology for industrial waste gas and hydrogen, applied in separation methods, chemical instruments and methods, hydrogen separation, etc., can solve the problems of hydrogen separation and pressurization of gas with complex components, no energy saving, large limitations, etc., and achieve short process, The effect of less land occupation and great development potential

Inactive Publication Date: 2008-11-19
SHANGHAI JIAO TONG UNIV
View PDF1 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that the method involved in this patent has great limitations. It is only limited to the purification and recovery of excess hydrogen in the fuel cell anode tail gas, and cannot separate and pressurize hydrogen from gases with complex components, because hydrogen is mostly in a high-pressure state And because of the small scale, the saved hydrogen energy does not have a great degree of energy-saving significance compared with the consumption of external DC power.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrogen containing industrial waste gas separation and purification method
  • Hydrogen containing industrial waste gas separation and purification method
  • Hydrogen containing industrial waste gas separation and purification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Composition is H 2 70%, N 2 23%, (Ar+CH 4 ) 7% mixed gas is first humidified in 85°C hot water through a gas humidifier, and then directly passed into the electrochemical hydrogen pump battery, that is, the gas separation battery. The battery bipolar plate flow used in this battery Field such as Figure 4 Shown (the positive electrode flow field, the negative electrode flow field and the positive electrode flow field are mirror symmetric); the proton exchange membrane used in this battery is a perfluorosulfonic acid membrane with a thickness of 50 μm; the positive electrode catalyst used in this battery is platinum, Loading capacity 0.35mg / cm 2 , the negative electrode catalyst is platinum, and the loading capacity is 0.3mg / cm 2 . The voltage applied to the battery is 0.3V, and the current density is 300mA / cm 2 . The temperature of the battery is kept at 80±2.5°C, the pressure of the battery positive air chamber is 0.20MPa, the pressure of the negative air cham...

Embodiment 2

[0044] The mixed gas (pressure is 0.20MPa) with the same composition as in Example 1 is first humidified in 85°C hot water by a gas humidifier, and then directly passed into a battery pack in series consisting of 3 electrochemical hydrogen pump cells The first battery in the battery, the exhaust gas comes out from the positive electrode of the first battery, is separated to remove moisture, and is discharged. The pure hydrogen gas from the negative electrode of the first battery enters the positive electrode of the second battery, and under the action of an external electric field, the hydrogen gas "permeates" into the negative electrode of the second battery, and the gas pressure increases to 0.30MPa. The hydrogen gas from the negative electrode of the second battery continues to be pressurized in the third battery to reach 0.35MPa. The battery bipolar plate flow field used in the battery of this gas separation battery pack is as follows Figure 4 Shown (the positive electro...

Embodiment 3

[0047] Composition is H 2 50%, CO 2 15%, CH 4 6%, (Ar+N 2 )29%, CO content about 5ppm, H 2 A mixed gas with an S content of about 1.4ppm (at a pressure of 0.25MPa) is directly passed into the first battery in a series battery pack consisting of three electrochemical hydrogen pump batteries, and the exhaust gas is discharged from the positive electrode of the first battery. Come out, separate to remove water, discharge. The pure hydrogen gas from the negative electrode of the first battery enters the positive electrode of the second battery. Under the action of an external electric field, the hydrogen gas "permeates" into the negative electrode of the second battery, and the gas pressure increases to 0.35MPa. The hydrogen gas from the negative electrode of the second battery continues to be pressurized in the third battery to reach 0.40MPa. The battery bipolar plate flow field used in the battery of this gas separation battery pack is as follows Figure 4 Shown (the po...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a separation and purification method for hydrogen-containing industrial waste gas of the field of environmental protection technology, which comprises the steps as follows: the industrial waste gas is humidified by a gas humidifier and then directly introduced to gas separation cells with a multi-level series connection structure, an external DC power supply provides power energy to the cells in a gas separation cell stack; hydrogen in the industrial waste gas is pumped or separated to a high-pressure cathode from a low-pressure anode, the hydrogen with improved pressure and purity is obtained at the gas outlet of the final cell cathode; the residual waste gas after passing through the gas separation cells is sent to a water-gas separation tank to remove the water and is emitted; the recycled water enters a water storage tank, the water supplement without saline water is simultaneously carried out in the water storage tank, and a water circulating pump is utilized for allowing the recycled water to be introduced into the gas humidifier, thereby forming a water circulation. The separation and purification method of the electrochemical cell technology of the invention utilizes a proton exchange membrane as an electrolyte, utilizes the hydrogen-containing industrial waste gas for power generation, and achieves the purposes of hydrogen recycling and utilization, energy conservation and consumption reduction.

Description

technical field [0001] The invention relates to a waste gas treatment method in the field of environmental protection technology, in particular to a method for separating and purifying hydrogen-containing industrial waste gas by using electrochemical principles. Background technique [0002] Under the background of the energy crisis, some high-energy-consuming industries pay more and more attention to the conservation and utilization of energy. Expanding hydrogen production resources, developing new hydrogen production processes, and improving existing hydrogen production processes have received widespread attention. In the chemical industry, ammonia plant exhaust gas, methanol tail gas, acetylene carbon black gas, diene tail gas, etc., all contain a certain amount of hydrogen. Utilize the hydrogen purification device to purify the waste gas of the chemical plant, obtain higher-purity hydrogen, and provide various purity hydrogen products for industrial enterprises, serving...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22C01B3/50
Inventor 隋升闫巍胡鸣若余晴春马丽荣
Owner SHANGHAI JIAO TONG UNIV