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Fuel chemical chain hydrogen production system and method

A fuel chemistry and hydrogen production system technology, applied in chemical instruments and methods, inorganic chemistry, hydrogen, etc., can solve problems such as difficulty in heat recovery and utilization, reduced hydrogen production efficiency, complex systems, etc., to suppress carbon deposition and widen the temperature window , The effect of high hydrogen production efficiency

Pending Publication Date: 2019-09-03
BEIJING LIANLI ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, three reactors are required to switch between circuits to continuously obtain hydrogen, so the system is very complicated
Furthermore, the system discharges two high-temperature flue gases (Fe 3 o 4 Flue gas and Fe released from reaction with air 2 o 3 Flue gas produced by the reaction with fuel), so it is difficult to recover and utilize heat, resulting in a decrease in hydrogen production efficiency
Therefore, the existing chemical looping hydrogen production process is not suitable for natural gas-H 2 -PEMFC Distributed Heat and Power Cogeneration System

Method used

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  • Fuel chemical chain hydrogen production system and method
  • Fuel chemical chain hydrogen production system and method
  • Fuel chemical chain hydrogen production system and method

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Embodiment 1

[0052] This embodiment provides a fuel chemical loop hydrogen production system, such as figure 1 shown.

[0053] The fuel chemical looping hydrogen production system provided in this embodiment includes two completely identical chemical looping combustion reactors, namely the first chemical looping combustion reactor 10 and the second chemical looping combustion reactor 20, wherein the two chemical looping combustion The reactors all include an outer tube 11 and an inner tube 12 coaxially arranged with the outer tube, the inner tube is filled with a first oxygen carrier 13, and the interlayer between the outer tube and the inner tube is filled with a second oxygen carrier 14; the inner tube The upper end of the inner tube is connected with a water vapor introduction pipeline 41 and a fuel introduction pipeline 42, and the lower end of the inner tube is connected with a gas outlet pipeline, and the gas outlet pipeline passes through the third three-way valve 53 (or the fourth ...

Embodiment 2

[0057] This embodiment provides a fuel chemical loop hydrogen production system, such as figure 2 shown.

[0058] In the fuel chemical loop hydrogen production system provided in this embodiment, water vapor is added to the fuel, and a steam reforming catalyst 15 is also filled above the first oxygen carrier filling layer to carry out the steam reforming reaction of fuel and CO water vapor Change response. Preferably, the steam reforming catalyst may be a Ni-based reforming catalyst or a Ru-based reforming catalyst.

[0059] In the fuel chemical loop hydrogen production system provided in this embodiment, the top of the first oxygen carrier filling layer is filled with a steam reforming catalyst, so that the fuel and Fe 3 o 4 Before the reaction, the fuel is pre-converted into CO and H with stronger reducing ability through the steam reforming reaction 2 , so that Fe 3 o 4 The temperature required for reduction to FeO is obviously lowered, and the reduction reaction tem...

Embodiment 3

[0063] This embodiment provides a fuel chemical loop hydrogen production system, such as image 3 shown.

[0064] In the fuel chemical chain hydrogen production system provided in this embodiment, a methanation reactor 30 is provided on the hydrogen outlet pipeline, and the methanation catalyst 31 is filled in the methanation reactor.

[0065] In this embodiment, a methanation reactor is installed on the hydrogen outlet pipeline, and a small amount of CO mixed into the hydrogen during switching 2 and CO is converted to H 2 -Harmless CH in PEMFC stack 4 .

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Abstract

The invention relates to a fuel chemical chain hydrogen production system and method, the fuel chemical chain hydrogen production system comprises two identical chemical chain combustion reactors, each chemical chain combustion reactor comprises an outer pipe and an inner pipe coaxially arranged with the outer pipe, the inner pipe is filled with a first oxygen carrier, and the interlayer between the outer pipe and the inner pipe is filled with a second oxygen carrier. The upper end of the inner pipe is connected with a steam introduction pipe and a fuel introduction pipe, and the lower end ofthe inner pipe is connected with a gas outlet pipe. When steam introduced into the first chemical chain combustion reactor and a reduced oxygen carrier carry out the oxidation reaction of the oxygen carrier, a fuel introduced into the second chemical chain combustion reactor and an oxidized oxygen carrier carry out reduction reaction of the oxygen carrier. The fuel chemical chain hydrogen production system has simple process, compact reactor and easy miniaturization, and can efficiently produce pure hydrogen from a gaseous or liquid fuel.

Description

technical field [0001] The invention relates to the technical field of fuel hydrogen production, in particular to a fuel chemical chain hydrogen production technology for efficiently producing hydrogen that can be directly used in proton exchange membrane fuel cell (PEMFC) pure hydrogen stacks from gaseous or liquid fuels. Background technique [0002] Hydrogen energy and fuel cells are an important development direction in the field of new energy technology, and how to efficiently produce various biomass gases from various fossil fuels such as natural gas, diesel, kerosene, gasoline, coke oven gas, and biogas Extracting pure hydrogen is an important research topic. Among various fuel cells, PEMFC has attracted much attention due to its two major uses, fuel cell vehicles (FCV) and distributed combined heat and power systems. So far, PEMFCs for FCVs usually use pure hydrogen stacks (H 2 -PEMFC), and the PEMFC used in distributed combined heat and power systems is usually us...

Claims

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Application Information

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IPC IPC(8): C01B3/16
CPCC01B3/16C01B2203/0233C01B2203/0283C01B2203/067C01B2203/0811C01B2203/0872C01B2203/1041C01B2203/1058C01B3/12
Inventor 苏庆泉
Owner BEIJING LIANLI ENERGY TECH CO LTD
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