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Decarburization solution for recovering and removing carbon dioxide gas from carbon dioxide flooding produced gas of oilfield

A carbon dioxide and gas technology, applied in chemical instruments and methods, inorganic chemistry, through absorption, etc., can solve problems such as easy foaming, insufficient decarburization ability of decarburization solution, strong corrosion, etc., and achieve high purification degree and regeneration energy The effect of low consumption and large absorption capacity

Active Publication Date: 2013-06-12
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a kind of decarburization solution for oilfield carbon dioxide flooding production gas recovery and removal of carbon dioxide gas, by adding several new solvents as activator, absorption aid, corrosion inhibitor and defoamer, by adding components Realize the composite effect with the main absorption component, improve the problem of insufficient decarburization ability, strong corrosion, and easy foaming of the decarburization solution, and can have a good recovery rate under medium and high pressure conditions when the pressure is greater than 0.3MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take two parts of the composite solution with the main absorption component MDEA solution as the main body, wherein the mass fraction of MDEA is 0.2, the mass fractions of DIPA and AEEA of the auxiliary absorption components are 0.01 and 0.025 respectively, and the mass fractions of activator components DEA and AEP are respectively The mass fraction of the corrosion inhibitor is 0.005 potassium chromate, the mass fraction of the antioxidant is 0.005 sodium metavanadate, the mass fraction of the defoamer is 0.005 simethicone, and the rest is water.

[0020]Set the temperature to 60 o C, gas phase CO 2 Containing CO under partial pressure of 0.8MPa and 2.6MPa 2 , liquid hydrocarbons and N 2 The mixed gas of the above-mentioned two parts of the solution was input respectively, and the test was carried out separately. After the gas-liquid two-phase reached equilibrium, the CO in the solvent was absorbed. 2 The molar ratio to the composite solution and the CO in the absor...

Embodiment 2

[0024] Take two composite solutions with MDEA solution as the main body, wherein the mass fraction of MDEA is 0.2, the mass fractions of DIPA and AEEA are 0.01 and 0.025 respectively, and the mass fractions of activator components DEA and AEP are 0.01 and 0.005 respectively , the mass fraction of the corrosion inhibitor is 0.005 potassium chromate, the mass fraction of the antioxidant is 0.005 sodium metavanadate, the mass fraction of the defoamer is 0.005 simethicone, and the rest is water.

[0025] Set the temperature to 115 o C, gas phase CO 2 Containing CO under partial pressure of 0.05MPa and 0.1MPa 2 , liquid hydrocarbons and N 2 The mixed gas of the mixed gas was input into the above solutions respectively, and the experiments were carried out separately. After the gas-liquid two phases reached equilibrium, the CO in the solvent was absorbed. 2 The molar ratio to the composite solution and the CO in the absorption solvent 2 See Table 2 for the solubility.

[0026] ...

Embodiment 3

[0030] Take two parts as the main absorption component K 2 CO 3 The solution is the complex solution of the main body, where K 2 CO 3 The mass fraction of MMEA and AEEA are 0.3, the mass fractions of MMEA and AEEA are 0.01 and 0.02 respectively, the mass fractions of activator components DEA and PZ are 0.01 and 0.005 respectively, and the mass fractions of corrosion inhibitor are 0.005 potassium dichromate and antioxidant The mass fraction is 0.005 sodium metavanadate, the defoamer is 0.005 hexanol, and the rest is water.

[0031] Set the temperature to 70 o C, gas phase CO 2 Containing CO under partial pressure of 0.9MPa and 1.9MPa 2 , liquid hydrocarbons and N 2 The mixed gas was input into the above solutions respectively, and the experiment was carried out separately. After the gas-liquid two phases reached equilibrium, the CO in the solvent was absorbed. 2 The molar ratio to the composite solution and the CO in the absorption solvent 2 See Table 3 for the solubili...

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PUM

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Abstract

The invention discloses a decarburization solution for recovering and removing carbon dioxide gas from the carbon dioxide flooding produced gas of an oilfield, comprising a main absorbing component, an activating component, a corrosion inhibitor, an antioxidant, a defoamer and water, wherein the main absorbing component is K2CO3 or MDEA (methyldiethanolamine); an auxiliary absorbing component is DIPA (diisopropanolamine) or MEA (mono edawnol amine) or MMEA (methyl monoethanolamine) or AEEA (aminoethylethanolamine) or DMEA (dimethylethanolamine); the activating component is DEA (diethanol amine) or PZ (zinc dimethyldithiocarbamate) or AEP (polyoxyethylene potassium dodecyl phosphate) or TETA (triethylene tetramine) or DETA (diethylenetriamine) or TEPA (tetraethylenepentamine) or glycine; the corrosion inhibitor is V2O5; the antioxidant is sodium metavanadate or potassium tartrate; the defoamer is dimethyl silicon oil or hexanol or heptanol or octanol; and the ratio of the main absorbing component to the auxiliary absorbing component to the activating component to the corrosion inhibitor to the antioxidant to the defoamer is (0.2 to 0.3): (0.03 to 0.05): (0.01 to 0.03): (0.005 to 0.008): (0.005 to 0.008): (0.0005 to 0.001).

Description

technical field [0001] The invention belongs to the technical field of gas separation, and in particular relates to a decarburization solution for recovery of produced gas from carbon dioxide flooding in an oil field and removal of carbon dioxide gas. Background technique [0002] As the application field with the most development value of carbon dioxide, oilfield CO 2 Tertiary oil flooding can not only enhance oil recovery but also effectively sequester carbon dioxide, which represents the frontier direction of energy saving and emission reduction, and has achieved both environmental and economic benefits. Carbon dioxide flooding technology is the most advanced oil displacement technology in tertiary oil recovery in the world. Many foreign oil fields have successfully conducted large-scale field tests and achieved good results, proving that carbon dioxide flooding is the most potential way to improve recovery in tertiary oil recovery. One of the methods of high yield and ...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/78B01D53/62C01B31/20C01B32/50
CPCY02C10/04Y02C10/06Y02A50/20Y02C20/40Y02P20/151
Inventor 李清方张建刘海丽陆诗建张新军王增林尚明华庞会中刘东杰孙广领黄少伟朱红彬张宁宁
Owner CHINA PETROCHEMICAL CORP
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