Natural gas hydrogen preparation and proton-exchange film fuel cell integrated generation method and device thereof

A proton exchange membrane and fuel cell technology, which is applied in the parts of fuel cells, solid electrolyte fuel cells, fuel cells, etc., can solve the problems of high operating cost and large hydrogen partial pressure difference of palladium membrane, and achieve reasonable energy allocation, The heat of the system is well matched and the effect of improving the amount of transmission

Inactive Publication Date: 2009-09-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that a large hydrogen partial pressure difference is required on both sides of the palladium membrane and the operation cost is relatively high in the process of using the palladium membrane to separate hydrogen production a

Method used

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  • Natural gas hydrogen preparation and proton-exchange film fuel cell integrated generation method and device thereof
  • Natural gas hydrogen preparation and proton-exchange film fuel cell integrated generation method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: 10 kW level natural gas hydrogen production and proton exchange membrane fuel cell integrated power generation system

[0026] A 10kw natural gas hydrogen production and proton exchange membrane fuel cell integrated power generation system, the system feed is natural gas and desalted water. The natural gas flow rate is 2.49kg / h, and the water flow rate is 10.87kg / h. The molar composition of natural gas is: CH 4 : 96.4%, C 2 h 6 : 1.97%, C 3 h 8 : 0.34%, I-C 4 h 10 : 0.07%, N-C 4 h 10 : 0.08%, N 2 : 0.9%, S: 50ppm, intake pressure: 1.2atm, intake temperature: normal temperature. The inlet water pressure is 1.2atm, and the inlet water temperature is normal temperature.

[0027] like figure 1As shown, the 10kw natural gas hydrogen production and proton exchange membrane fuel cell integrated power generation device includes a desulfurizer 1, a first heat exchanger 2, a membrane separator 3, a second heat exchanger 4, a third heat exchanger 7, and a fo...

Embodiment 2

[0037] Example 2: 50 kW level natural gas hydrogen production and proton exchange membrane fuel cell integrated power generation system

[0038] A 50kw natural gas hydrogen production and proton exchange membrane fuel cell integrated power generation system, the feed composition is the same as in Example 1. The feed rate of natural gas is 12kg / h, and the amount of water is 39kg / h. The configuration of the power generation system is the same as in Embodiment 1.

[0039] During operation, raw natural gas is desulfurized by desulfurizer 1 to remove hydrogen sulfide. The desulfurized natural gas enters the first heat exchanger 2 through the pipeline to exchange heat with the hydrogen-containing synthesis gas from the outlet of the reforming reactor 9, the natural gas is heated to 635°C, and the temperature of the synthesis gas is cooled to 640°C. The heat-exchanged natural gas and synthesis gas enter the low-pressure side and high-pressure side of the membrane separator 3 respec...

Embodiment 3

[0042] Example 3: 200 kilowatt-level natural gas hydrogen production and proton exchange membrane fuel cell integrated power generation system

[0043] A 200kw natural gas hydrogen production and proton exchange membrane fuel cell integrated power generation system, the feed composition is the same as in Example 1. The feed rate of natural gas is 46.4kg / h, and the amount of water is 152kg / h. The configuration of the power generation system is the same as in Embodiment 1.

[0044] During operation, raw natural gas is desulfurized by desulfurizer 1 to remove hydrogen sulfide. The desulfurized natural gas enters the first heat exchanger 2 through the pipeline to exchange heat with the hydrogen-containing synthesis gas from the outlet of the reforming reactor 9. The natural gas is heated to 600°C, and the temperature of the synthesis gas is cooled to 610°C. The heat-exchanged natural gas and synthesis gas enter the low-pressure side and high-pressure side of the membrane separat...

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Abstract

The invention discloses a natural gas hydrogen preparation and proton-exchange film fuel cell integrated generation method and a device thereof. The high-temperature fluid side of a fourth heat exchanger of the device is respectively connected with the high-pressure side of a film separator and a pressure adjusting valve; the low-temperature fluid side is connected with a pipeline between a compressor and a third heat exchanger; the high-temperature fluid side of the third heat exchanger is respectively connected with a fuel gas outlet and an exhaust pipe of a reforming reactor, and the low-temperature fluid side is respectively connected with the compressor and the inlet of the reforming reactor. The invention utilizes hydrogen-preparing raw material gas harmless to the proton-exchange film fuel cell, namely the natural gas, as blowing gas at the inner side of a palladium film and decreases the partial pressure of the hydrogen at the inner side of the film so as to improve the hydrogen partial pressure difference inside and outside the film and improve the whole generation efficiency of the natural-gas reforming hydrogen preparation system and the fuel cell integrated generation system. The invention has simple design, good system heat match and high energy utilization rate and provides a new technological method for the natural gas reforming palladium film hydrogen preparation and proton-exchange film fuel cell integrated generation.

Description

Technical field: [0001] The invention relates to a process for producing hydrogen from natural gas and a proton exchange membrane fuel cell for integrated power generation, in particular to a process and a device for separating and producing CO-free hydrogen by using a palladium membrane. Background technique [0002] Since the end of the 20th century, fuel cell technology has developed rapidly. A fuel cell is an efficient energy conversion device that converts chemical energy into electrical energy, and its discharge is water, which will not cause harm to the environment. Currently, the most mature fuel cell technology is the proton exchange membrane fuel cell, which has very strict requirements on the content of CO in the hydrogen source (CO < 10 ppm). If high-purity hydrogen that meets the needs of proton exchange fuel cells can be produced on a small scale, a key problem in the popularization and application of current fuel cell technology can be solved. Small-scale...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M8/06H01M8/04H01M8/02H01M8/04298H01M8/0606
CPCY02E60/521Y02E60/50
Inventor 解东来叶根银
Owner SOUTH CHINA UNIV OF TECH
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