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Methods of generating and testing aqueous gas streams

A gas and water flow technology, applied in chemical instruments and methods, preparation of test samples, analysis of gas mixtures, etc., can solve the problem of maintaining the required concentration of dissolved water-containing gas, difficult to limit atmospheric exposure of corrosive and toxic gas substances, and changing And other issues

Pending Publication Date: 2021-09-17
SAUDI ARABIAN OIL CO
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Concentration stability is especially important when analyzing how dissolved aqueous gases interact with samples, because concentrations of single and mixed gases can affect materials differently, and changing the concentration of one gas without affecting the concentration of other dissolved species may have implications for other methods. challenge
Additionally, some dissolved aqueous gases must be handled safely to limit exposure to the environment and humans
However, current methods of generating dissolved aqueous gases make it difficult to both maintain the desired concentration of dissolved aqueous gases and limit atmospheric exposure to corrosive and toxic gaseous species while allowing real-time electrochemical measurements

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  • Methods of generating and testing aqueous gas streams
  • Methods of generating and testing aqueous gas streams
  • Methods of generating and testing aqueous gas streams

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example

[0050] Formation of CO from aqueous salt precursor solution and aqueous acid precursor solution 2 The reaction is described in Reaction Mechanism 1 as follows:

[0051] Overall response:

[0052]

[0053] Reaction steps:

[0054]

[0055]

[0056]

[0057] In this example, sodium carbonate (Na 2 CO 3 ) is used as aqueous salt precursor solution, sulfuric acid (H 2 SO 4 ) was used as an aqueous acid precursor solution to generate CO 2 , sodium sulfate (Na 2 SO 4 ) and water. The results for Reaction Mechanism 1 are shown in Tables 1A and 1B below:

[0058]

[0059] Tables 1A and 1B show the different concentrations of CO produced in three separate experiments 2 Precursor and final solution concentrations for aqueous solutions. CO 2 The concentration range is 2mM to 10mM. These experiments were performed at 25°C with a total flow rate of 20 mL / min (10 mL / min for each precursor solution). The resulting pressure generated in the self-pressurized flow...

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Abstract

The invention discloses a method for producing aqueous gas streams within a self-pressurized flow cell 16 are disclosed. An aqueous salt precursor 7 and an aqueous acid precursor 5 are mixed at a mixing position 12 in-line to produce a stream precursor mixture 13. The stream precursor mixture 13 is introduced through an inlet tube 14 into the self-pressurized flow cell 16 to produce an aqueous gas. Once in the self-pressurized flow cell 16, the precursor mixture 13 may react with the sample 48. Both the sample 48 and the reacted aqueous solution 62 may be subjected to a variety of real-time tests, such electrochemical tests and in line characterization techniques. The method allows for the concentrations of the aqueous salt precursor and the aqueous acid precursor to be accurately and precisely maintained while allowing for increased safety when handling and testing the various toxic aqueous gas streams produced.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Patent Application No. 16 / 050,245, filed July 31, 2018. technical field [0003] Embodiments of the present disclosure generally relate to methods of generating and testing dissolved gases in aqueous liquid streams, and more particularly relate to mixing an aqueous acid precursor solution and an aqueous salt precursor solution at an in-line mixing location under a pressure vessel to generate dissolved aqueous gas, and the aqueous mixture is introduced into a self-pressurized flow cell, and the material of interest is then exposed to the aqueous gas flow within the self-pressurized flow cell. Background technique [0004] The oil and gas industry has been grappling with carbon dioxide (CO2 2 ) and hydrogen sulfide (H 2 S) and other dissolved gases, when the transport contains CO 2 、H 2 S or its mixtures of liquids and gases, these gases can cause pipeline degradation and ...

Claims

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Application Information

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IPC IPC(8): G01N17/02
CPCG01N17/02G01N1/38G01N27/407G01N21/17G01N33/0004C01B17/16C01B32/50G01N2001/386
Inventor 史蒂文·C·海登提摩西·J·库查尔斯基米歇尔·L·奥斯特拉特瑞秋·O·格鲁特詹姆斯·P·穆拉霍
Owner SAUDI ARABIAN OIL CO
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