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A method of abating carbon dioxide and hydrogen sulfide

A carbon dioxide and hydrogen sulfide technology, applied in chemical instruments and methods, separation methods, earthwork drilling, etc., can solve the problems of not describing the method of hydrogen sulfide emission reduction in detail, not fully understanding the usefulness, etc., to promote safe long-term storage , the effect of improving safety and reducing the risk of leakage

Pending Publication Date: 2021-12-31
CARBFIX IS IS +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, until now such a method of hydrogen sulfide reduction has not been described in detail nor is it fully understood which factors can actually influence the usefulness of this method

Method used

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  • A method of abating carbon dioxide and hydrogen sulfide
  • A method of abating carbon dioxide and hydrogen sulfide
  • A method of abating carbon dioxide and hydrogen sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0159] 0.07kg / s of CO 2 Gas cleaning plants or gas separation stations from geothermal power plants. The initial pressure of the gas was 30 bar. To deliver the gas to the injection well, tubing with an outer diameter (OD) of 40 mm was chosen, resulting in a pressure drop of 1.45 bar. Including other pressure losses, a wellhead pressure of 28 bar is assumed. For injection, a tube of OD 32mm is chosen, resulting in a pressure drop of 0.41 bar, but due to gravity, the head at the merge point will increase by 1.1 bar and the pressure at the merge point will be 28.6 bar.

[0160] The injection tube was an OD 75mm tube and a volumetric flow of water of 1.94 kg / s was required to dissolve gaseous carbon dioxide. The pressure drop under these conditions was 0.51 bar / 100m. Therefore, due to the pressure drop down to the merge point, the water column in the injection pipe will be about 13m above the water level in the well. There is no need to change the location of the merge point ...

Embodiment 2

[0163] In this example, the partial pressure of carbon dioxide is chosen to be 25 bar downhole. This means saturation or 36g CO at 17°C at 25 bar pressure 2 / kg water. At this temperature and pressure, the volume of carbon dioxide is about 20 times that of an equivalent amount of water at atmospheric pressure. In order for the water to be able to pull the gas down, the volume of the gas should not exceed the volume of the water, preferably much less. In order for the water to be able to carry the gas down the pipe, the hydraulic pressure at the point of gas release (merging point) should preferably be close to the saturation pressure of 25 bar. However, the pressure can be made lower if sufficient volumetric water flow is maintained. Some of the gas will dissolve in the water, and the rest of the gas will form small bubbles and travel down the tube with the water. As depth increases, the bubbles become smaller with increasing pressure, and the gas continues to dissolve in ...

Embodiment 3

[0165] In this embodiment, if Figure 10 As shown, monitoring well 610 is interconnected with injection well 612 by a flow path 614, which may be, for example, a fracture in a geological reservoir. The monitoring well 610 is implemented to estimate CO 2 mineralization capacity. The estimation step consists of using one or more tracer substances to trace the CO 2 gas or water or carbon. Thus, one or more types of tracers can be added via an appropriate tracer source for tracing one or more of these in a controlled manner such that CO 2 The molar ratio between gas or water or carbon and one or more tracer substances is predetermined, ie the molar ratio is pre-fixed. This means that only one tracer can be used for tracer, e.g. only CO 2 , or C alone, or water alone or a combination thereof. As an example, SF 5 CF 3 Tracer, SF 6 Tracer or rhodamine tracer can be applied to trace the dilution between the injected fluid and the ambient water in the reservoir, and to charact...

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Abstract

This invention relates to a method and a system of abating carbon dioxide (CO2) and / or hydrogen sulfide (H2S) in a geological reservoir. Water is pumped or transferred from a water source to an injection well. The gasses are merged with the water under conditions where the hydraulic pressure of the water is less than the pressure of CO2 and / or H2S gas at the merging point. The water with CO2 and / or H2S gas bubbles is transferred further downwardly at a certain velocity higher than the upward flow velocity of said CO2 and / or H2S gas bubbles ensuring downward movement of gas bubbles resulting in full dissolution of said CO2 and / or H2S in the water due to elevating pressure. The complete dissolution ensures a lowered pH of the water entering a geological (e.g. geothermal) reservoir which is needed to promote mineral reactions leading to CO2 and H2S abatement This abatement may be quantified by dissolving a tracer substance in a predetermined molar ratio to said dissolved CO2 and / or H2S and monitored in a monitoring well.

Description

technical field [0001] The present invention relates to be used for by carbon dioxide (CO 2 ) and / or hydrogen sulfide (H 2 S) Injection into geological reservoirs and their subsequent storage in geological reservoirs to reduce carbon dioxide (CO 2 ) and / or hydrogen sulfide (H 2 S) Methods and systems. Background technique [0002] carbon dioxide (CO 2 ) and hydrogen sulfide (H 2 S) are two gases that are often released in large quantities in a wide range of industrial processes, such as the combustion of fossil fuels. Both gases present important challenges to the environment. [0003] Reduce industrial CO 2 Emissions are one of the major challenges of this century (Reference 1: Broecker and Kunzig). Generally, CO from geothermal resources 2 Emissions are relatively low, and these resources are classified as renewable energy. This is in contrast to conventional power plants that run on fossil fuels, which buy and sell pollution permits (called "allocations"). [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/52B01D53/62B01D53/78E21B41/00
CPCB01D53/62B01D53/52B01D2257/304B01D2257/504B01D53/78Y02C20/40E21B43/164E21B41/0064E21B47/11B01D53/1412B01D53/1468B01D53/1475B01D2252/103B65G5/00
Inventor 柏格·西格富松埃达·西夫·平德·阿拉多蒂尔英格维·贡纳松马格努斯·波尔·阿纳森埃纳尔·冈劳格松霍姆弗里奥·西于尔扎多蒂尔于尼·赛瓦特松西古尔·雷尼尔·吉斯拉松埃里克·H·厄尔克斯基弗洛姆·G·梅斯芬桑德拉·奥斯克·斯努比约恩斯多蒂尔伊沃纳·M·伽莱兹卡多梅尼克·沃尔夫-伯尼施海尔吉·A·阿尔弗雷松索尔斯泰恩·荣松安德里·斯特芬森于尔格·马特尔马丁·施图特戴尔德丽·伊丽莎白·克拉克马丁·约翰尼斯·福格特
Owner CARBFIX IS IS
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