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An electrochemical system for CO2 capture and mineralization storage

An electrochemical and electrolyte technology, applied in the field of electrochemical systems, can solve problems such as complex system structures, and achieve the effects of simple system structure, easy modular design, and low energy consumption

Active Publication Date: 2019-02-26
DALIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the former are carried out under high temperature or high pressure, and the system structure is complex

Method used

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  • An electrochemical system for CO2 capture and mineralization storage
  • An electrochemical system for CO2 capture and mineralization storage
  • An electrochemical system for CO2 capture and mineralization storage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: CO 2 Electrochemical capture and storage system structure

[0029] figure 1 gives CO 2 Electrochemical capture and mineralization storage system structure. The system consists of three parts: fluid power module, reaction module and control and display module. The fluid power module is connected to the reaction module, which not only provides 2 The raw material gas can also be supplemented with supporting electrolytes and reactants. The control and display modules are connected to the reaction module and the fluid power module at the same time. On the one hand, the system controller provides power to the above-mentioned sensor devices, and controls the fluid power module to provide reactants and replenish electrolyte for the reactor according to the response of the sensor devices; on the other hand , There is a digital signal processor (DSP) in the controller to control the operation of the reactor, to provide the system with steady state, transient state...

Embodiment 2

[0030] Example 2: CO 2 The structure of the electrochemical capture and mineralization storage system is the same as in Example 1. In this example, the addition of silicate is compared to the system CO 2 The absorption efficiency and the impact of emission products.

[0031] figure 2 .Given the electrochemical CO with and without silicate minerals 2 Capture and mineralization storage system, at a current density of 2mA·cm -2 Under the condition, the system’s response to CO in the air 2 Absorption effect and system tank pressure. It can be seen that the introduction of calcium silicate for CO 2 The absorption and system power consumption have obvious effects after 100 minutes, and the system containing calcium silicate exhausts gas CO 2 The concentration is relatively low. Table 1 shows the effect of the introduction of silicate on the pH of the discharge product after the system has been running for 8 hours. It can be seen that the introduction of calcium silicate sign...

Embodiment 3

[0034] Example 3: CO 2 The structure of the electrochemical capture and mineralization storage system is the same as in Example 1. In this example, the effect of silicate species on the system CO 2 influence on the absorption efficiency.

[0035] image 3 given in CO 2 After introducing calcium silicate, magnesium silicate, aluminum silicate and sodium silicate into the electrochemical capture and mineralization storage system, the CO 2 Comparison of absorption effects. During the operation of the system, the reaction module operates in a steady-state constant current mode, and its current is 2mA·cm -2 . It can be seen that the type of silicate affects the system CO 2 Transient and steady-state behavior of absorption. One hour after the system was started, the system of aluminum silicate and magnesium silicate was introduced to CO 2 Absorption is less effective than systems containing calcium silicate and sodium silicate. After 3 hours of operation, the system has ent...

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PUM

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Abstract

The invention belongs to the technical field of carbon resource capturing and storing and relates to a system for achieving CO2 capturing and mineralization through an electrochemical method. The system is structurally composed of three parts of a hydrodynamic force module, a reaction module and a control and display module. By means of the electrochemical technology of a steady state, a transient state and combination of the steady state and the transient state, silicate is converted into carbonate, and CO2 capturing and mineralization are achieved. The CO2 capturing and mineralization system is mainly used for relieving the increasing greenhouse effect, liquid flow drained by the system is alkaline, and treatment of ocean acidification of local areas is achieved at the same time. The system can also be used for adjusting the concentration of CO2 gas in a closed space in real time and can also serve as an auxiliary facility for emission reduction of large CO2 emission enterprises.

Description

technical field [0001] The invention belongs to the technical field of capture and storage of carbon resources, and relates to a 2 Electrochemical system for capture and mineralization storage Background technique [0002] Excessive emissions of CO in my country 2 Primarily derived from the combustion of fossil fuels, such as those used to generate electricity, but also from small, diffuse sources such as automobile engines and furnaces, including those used in residential and commercial buildings; in addition, CO 2 It will also be produced in the process of refining certain mineral resources. Currently, excess CO emissions 2 has led to the increasingly serious greenhouse effect, because most of the CO 2 The gas is being absorbed by the ocean, making ocean acidification a growing problem. The concern of the international community on climate change has led to the advent of the United Nations Framework Convention on Climate Change, further promoting the CO 2 The develop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00C25B15/02
CPCC25B1/00C25B15/02
Inventor 毛庆崔剑铭黄延强刘建军景维云石越
Owner DALIAN UNIV OF TECH
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