Fuel cell operation technology for improving regeneration rate and electricity generating efficiency of complex iron in desulfuration process

A fuel cell, regeneration rate technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of slow regeneration, low battery coulomb efficiency, etc., to achieve the effect of electric energy recovery promotion, process energy saving and environmental protection, and small size

Inactive Publication Date: 2015-07-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102881961A adopts fuel cell technology, which can make the complexed Fe(II) oxidize spontaneously and generate electric energy at the same time, which can effectively overcome a series of problems above, but has the defects of low coulombic efficiency of the battery and slow regeneration of Fe(III)

Method used

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  • Fuel cell operation technology for improving regeneration rate and electricity generating efficiency of complex iron in desulfuration process
  • Fuel cell operation technology for improving regeneration rate and electricity generating efficiency of complex iron in desulfuration process
  • Fuel cell operation technology for improving regeneration rate and electricity generating efficiency of complex iron in desulfuration process

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Comparison scheme
Effect test

Embodiment 1

[0022] In the air cathode fuel cell, the carbon fiber is the anode of the battery, and the desulfurized iron complex solution with a pH value of 8 is added, and its composition is 1 mmol L -1 FeCl 2 , 2mmol·L -1 NTA, 0.2mol L -1 Sodium bicarbonate, 0.2mol·L -1 NaCl, use 1mol L under nitrogen atmosphere -1 The pH of the solution was adjusted to 10.5 with NaOH, and the cell was closed. The cathode and anode of the battery are connected with wires, and a 1kΩ resistor is connected in the middle to measure the voltage across the resistor. When the voltage drops to zero, the circuit is disconnected, and the nanometer Fe(III) compound catalyst is loaded on the anode of the battery in situ. Replace the solution in the battery with the complex iron solution after desulfurization, connect the circuit, and take samples to measure Fe in real time. 2+ concentration. When the voltage drop is 1mv, the circuit is disconnected, and the calculated coulombic efficiency of the battery is 7...

Embodiment 2

[0024] In the air cathode fuel cell, the carbon felt is the anode of the battery, and the complex iron solution after desulfurization with a pH value of 6 is added, and its composition is 10mmol L -1 FeSO 4 , 10mmol·L -1 NTA, 0.2mol L -1 Sodium bicarbonate, use 1mol L under nitrogen atmosphere -1 The pH of the solution was adjusted to 9 with NaOH, and the cell was closed. The cathode and anode of the battery are connected with wires, and a 1kΩ resistor is connected in the middle to measure the voltage across the resistor. When the voltage drops to about zero, the circuit is disconnected, and the nanometer Fe(III) compound catalyst is loaded on the anode of the battery in situ. Replace the solution in the battery with the complex iron solution after desulfurization, connect the circuit, and take samples to measure Fe in real time. 2+ concentration. When the voltage drop is 1mv, the circuit is disconnected, and the calculated coulombic efficiency of the battery is 67%, and...

Embodiment 3

[0026] In the air cathode fuel cell, the carbon paper is the anode of the battery, and the complex iron solution after desulfurization with a pH value of 7.5 is added, and its composition is 30mmol L -1 Molar salt, 15mmol·L -1 EDTA, 0.2mol L -1 Sodium bicarbonate, 0.2mol·L -1 Na 2 SO 4 , use 1mol·L under nitrogen atmosphere -1 The pH of the solution was adjusted to 12 with NaOH, and the cell was closed. The cathode and anode of the battery are connected with wires, and a 1kΩ resistor is connected in the middle to measure the voltage across the resistor. When the voltage drops to about zero, the circuit is disconnected, and the nanometer Fe(III) compound catalyst is loaded on the anode of the battery in situ. Replace the solution in the battery with the complex iron solution after desulfurization, connect the circuit, and take samples to measure Fe in real time. 2+ concentration. When the voltage drop is 1mv, the circuit is disconnected, and the calculated coulombic eff...

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Abstract

The invention discloses a fuel cell operation technology for improving the regeneration rate and electricity generating efficiency of complex iron in the desulfuration process. An air electrode using a single-chamber proton exchange membrane fuel cell as a reactor and using a platinum carbon catalyst serves as a cathode, a carbon material serves as an anode, a desulfurized complex iron solution is added, and a NaOH solution is used for regulating a pH value to be 9-12 under the nitrogen condition so as to seal the cell. The cathode and anode of the cell are connected through a lead, a resistor is connected to the middle and used for measuring voltages at two ends of the resistor, and when the voltages are reduced to be zero, a circuit is disconnected, and an in-situ loaded Fe (III) compound catalyst is obtained from the cathode of the cell. The solution in the cell is replaced by a new desulfurized complex iron solution, the circuit is connected, and the Fe (III) compound catalyst loaded on the cathode enables the coulombic efficiency of the cell and the regeneration rate of Fe (III) in the solution to be remarkably improved.

Description

1. Technical field [0001] The invention relates to a fuel cell operation process for improving complexed iron regeneration and electricity production efficiency in the desulfurization process, specifically, the fuel cell technology is used to process the complexed iron solution after desulfurization, and by adjusting the pH value of the solution, carbon in the anode of the battery The nano-Fe(III) compound is loaded in situ and the anode material is applied to the regeneration of complexed iron after desulfurization, so as to improve the regeneration rate of complexed iron and the Coulombic efficiency of the battery. 2. Background technology [0002] Complex iron desulfurization technology is widely used in the removal of various hydrogen sulfide-containing waste gases and sulfides in wastewater due to its high recovery efficiency of elemental sulfur, little influence from other components in the waste gas, low investment cost, and strong operability. The technology is based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92H01M4/90
CPCH01M4/88H01M4/90H01M4/92H01M4/926Y02E60/50
Inventor 翟林峰胡丽丽孙敏王华林
Owner HEFEI UNIV OF TECH
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