Method for preparing hydrogen for fuel cell from yellow phosphorus tail gas

A yellow phosphorus tail gas, fuel cell technology, applied in the direction of fuel cells, separation methods, chemical instruments and methods, etc.

Pending Publication Date: 2020-07-03
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above technical problems, the present invention provides a method for producing hydrogen for fuel cells from yellow phosphorus tail gas, which directly obtains hydrogen meeting the hydrogen fuel cell standard from industrial exhaust gases such as yellow phosphorus tail gas, overcoming the existing The bottleneck problem that hydrogen needs to consume primary energy raw materials such as coal, oil, and natural gas will enrich the source of hydrogen used in fuel cells; and increase the utilization of yellow phosphorus tail gas, reduce waste and environmental pollution, and improve the comprehensive utilization efficiency of resources

Method used

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  • Method for preparing hydrogen for fuel cell from yellow phosphorus tail gas
  • Method for preparing hydrogen for fuel cell from yellow phosphorus tail gas

Examples

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Embodiment 1

[0053] A method for producing hydrogen for fuel cells from yellow phosphorus tail gas. The yellow phosphorus tail gas passes through PDS unit, conversion adsorption unit, conversion unit, pressure swing adsorption decarburization unit, PSA / H2 pressure swing adsorption hydrogen purification unit and catalytic purification in sequence The unit is available.

[0054] The specific steps are as follows:

[0055] (1) Yellow phosphorus tail gas is used to remove hydrogen sulfide and some organic sulfides through the PDS unit;

[0056] Yellow phosphorus tail gas is yellow phosphorus tail gas emitted from low-quality fuel or vented flare combustion.

[0057] The PDS unit includes an absorption tower and an oxidation regeneration tower. The oxidation regeneration tower of the absorption tower is connected in series; the absorption liquid in the absorption tower is an aqueous solution using sodium carbonate as an alkali source and PDS catalyst and other additives are added. Bottom-up through th...

Embodiment 2

[0067] A method for preparing hydrogen for fuel cells from yellow phosphorus tail gas, in sequence, is as follows:

[0068] (1) Yellow phosphorus tail gas is used to remove hydrogen sulfide and some organic sulfides through the PDS unit;

[0069] Yellow phosphorus tail gas is yellow phosphorus tail gas emitted from low-quality fuel or vented flare combustion.

[0070] The PDS unit includes an absorption tower and an oxidation regeneration tower. The oxidation regeneration tower of the absorption tower is connected in series; the absorption liquid in the absorption tower is an aqueous solution using sodium carbonate as an alkali source and PDS catalyst and other additives are added. Bottom-up through the absorption tower filled with fillers, the absorption liquid containing PDS catalyst flows through the absorption tower from top to bottom; the absorption liquid after absorbing sulfide enters the oxidation regeneration tower, and air is blown into the absorption liquid through bubblin...

Embodiment 3

[0082] A method for preparing hydrogen for fuel cells from yellow phosphorus tail gas, which includes a PDS absorption and desulfurization unit, a conversion adsorption unit, a water vapor conversion unit, a pressure swing adsorption purification hydrogen unit and a catalytic purification unit in sequence.

[0083] The composition content of yellow phosphorus tail gas is as follows in Table 1: (where S, P, As, F are g / Nm 3 )

[0084] Table 1

[0085] ComponentH2

O2

N2

COCH 4

CO 2

ΣS ΣP ΣAs ΣFH 2 O

X Content V%10.00.804.0080.01.002.50300.080.020.12 saturation 100

[0086] Yellow phosphorus tail gas 3000Nm 3 / h, the pressure of 0.05Mpa enters the PDS desulfurization unit consisting of two absorption towers connected in series and one oxidation regeneration tower, and the hydrogen sulfide in the yellow phosphorus tail gas is removed to ~10ppm and then enters the conversion adsorption by three sets The conversion adsorption unit constituted by the reactor, where the PH in the raw...

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Abstract

The invention belongs to the field of hydrogen extraction and particularly relates to a method for preparing hydrogen from industrial waste gas. The method is characterized in that yellow phosphorus tail gas sequentially passes through a PDS unit which is used for removing hydrogen sulfide and a part of sulfide in an organic form, a conversion and adsorption unit which is used for removing hydrogen phosphide, arsenic hydride, hydrogen sulfide and organic sulfide, a conversion unit which is used for reacting carbon monoxide in the yellow phosphorus tail gas with water vapor under the action ofa catalyst to generate hydrogen and carbon dioxide, and a PSA / H2 pressure swing adsorption hydrogen purification unit, thereby obtaining hydrogen; and the hydrogen passes through a catalytic purification unit so as to remove oxygen and trace hydrogen sulfide in the hydrogen, so the content of oxygen in the obtained hydrogen is lower than 5 ppm, the content of sulfide is lower than 0.004 ppm, the content of carbon dioxide is lower than 2 ppm, the content of water is lower than 5 ppm, the content of nitrogen is lower than 100 ppm, the content of hydrogen and impurities reaches the GB / T37244-2018standard, and the hydrogen meets requirements on hydrogen for the fuel cell.

Description

Technical field [0001] The invention belongs to the technical field of hydrogen extraction, and particularly relates to a method for preparing hydrogen for fuel cells from yellow phosphorus tail gas. Background technique [0002] Yellow phosphorus tail gas is the tail gas of the yellow phosphorus boiler, which is caused by incomplete combustion and pollutes the atmosphere. Yellow phosphorus tail gas contains 80-90% carbon monoxide and 5-10% hydrogen, sulfur, phosphorus, arsenic and other impurities. my country is a big yellow phosphorus producer, with a production scale of more than 600,000 tons, and each ton of yellow phosphorus produces 2500-3000Nm3 of yellow phosphorus tail gas. At present, in the treatment of yellow phosphorus tail gas, most of the methods are vented combustion or used as low-quality fuel, and a small amount of carbon monoxide after purification of yellow phosphorus tail gas is used as raw material for formic acid and methanol. Since the amount of yellow ph...

Claims

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Application Information

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IPC IPC(8): C01B3/50C01B17/02C01B17/06B01D53/86B01D53/96B01D53/52B01D53/48B01D53/02H01M8/0606
CPCC01B3/50C01B17/0253C01B17/06B01D53/8612B01D53/8603B01D53/8606B01D53/96B01D53/02H01M8/0606C01B2203/0485C01B2203/048C01B2203/042C01B2203/047C01B2203/044C01B2203/0435C01B2203/0415B01D2251/304B01D2251/606B01D2257/306B01D2253/25B01D2255/20746B01D2259/4009Y02E60/50
Inventor 陈健张剑锋杨云王键张宏宇
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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