CN106442022A - Curing and sampling method for carbon in gas phase carbon dioxide - Google Patents

Curing and sampling method for carbon in gas phase carbon dioxide Download PDF

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Publication number
CN106442022A
CN106442022A CN201610780179.6A CN201610780179A CN106442022A CN 106442022 A CN106442022 A CN 106442022A CN 201610780179 A CN201610780179 A CN 201610780179A CN 106442022 A CN106442022 A CN 106442022A
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CN
China
Prior art keywords
solution
carbon dioxide
gas phase
air
caco
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CN201610780179.6A
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Chinese (zh)
Inventor
郑克勋
余波
郭维祥
马聪
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China Hydropower Consulting Group Guiyang Geotechnical Engineering Co Ltd
PowerChina Guiyang Engineering Corp Ltd
Original Assignee
China Hydropower Consulting Group Guiyang Geotechnical Engineering Co Ltd
PowerChina Guiyang Engineering Corp Ltd
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Application filed by China Hydropower Consulting Group Guiyang Geotechnical Engineering Co Ltd, PowerChina Guiyang Engineering Corp Ltd filed Critical China Hydropower Consulting Group Guiyang Geotechnical Engineering Co Ltd
Priority to CN201610780179.6A priority Critical patent/CN106442022A/en
Publication of CN106442022A publication Critical patent/CN106442022A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2273—Atmospheric sampling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/40—Concentrating samples
    • G01N1/4044—Concentrating samples by chemical techniques; Digestion; Chemical decomposition

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

The invention discloses a curing and sampling method for carbon in gas phase carbon dioxide. The method include the following steps that 1, pure water without CO2 is prepared; 2, an unsaturated Ca(OH)2 solution is prepared; 3, the unsaturated Ca(OH)2 solution is put in an air environment needing sampling in an open mode, the solution is kept to fully makes contact with air, and CaCO3 precipitates are separated out; 4, the Ca(OH)2 solution with the CaCO3 precipitates is filtered, and the CaCO3 precipitates are collected. According to the characteristic that carbon dioxide and calcium hydroxide react to generate the calcium carbonate solid precipitates, rare carbon dioxide in the air is concentrated and fixed into calcium carbonate for further analysis, detection and testing.

Description

The solidification of carbon and sampling method in gas phase carbon dioxide
Technical field
The invention belongs to chemistry and geology, especially relate to carbon in a kind of gas phase carbon dioxide solidification and Sampling method.
Background technology
The aerial concentration of carbon dioxide is about 0.0003～0.0004 atmospheric pressure, i.e. accounts for 0.03～0.04%, soil Carbon dioxide content in earth air is more much higher than in air, can account for the 0.74～9.74% of volume.Carbon dioxide is in atmosphere Ratio is very little, but its role and influence are very prominent, and it is greenhouse gases, is also the Source of life of plant.Carbon is often in all kinds of inspections Survey and in research as a kind of tracer element, how to obtain representational sample, be an important problem, particularly to dilute The sampling of thin and ratio Carbon Dioxide in Air little again, finds no relatively simple and effectively concentrates and solidify sampling side Method.
Content of the invention
It is an object of the invention to generate the sedimentary feature of calcium carbonate solid according to carbon dioxide with calcium hydroxide reaction, will Rare gas phase carbon dioxide in air, concentrates and is fixed in stable calcium carbonate, in order to be further analyzed, Detection and test, can be applicable in the correlation test of karst area fundamental research and engineering Application Research, it is possible to be applied to Other samplings relating to gas phase carbon dioxide and detection field.
The present invention is realized in：
Calcium hydroxide (Ca (OH)2) dissolved carbon dioxide (CO in solution2) there is chemical reaction afterwards, generate calcium carbonate (CaCO3) sediment, chemical equation is as follows.
Ca(OH)2+CO2→CaCO3↓+H2O
CO in atmosphere2Concentration be about 0.0003～0.0004 atmospheric pressure, i.e. account for 0.03～0.04%, soil air In CO2In content ratio air much higher, the 0.74～9.74% of volume can be accounted for.CO in air2Content is few, but source is steady Fixed.
Pure water CO between 10～30 DEG C, in atmospheric environment2Meltage is 0.765～0.415mg/L.Put down according to carbonic acid Weighing apparatus theory, CO in water2With Ca (OH)2Continual supplementing will be obtained from air after reaction.
The Ca in 100g pure water (OH) between 10～30 DEG C2Solubility is 0.176～0.153g, i.e. 1.76～1.53g/ L.CaCO in pure water in the atmospheric environment of 10～30 DEG C3Solubility is about 0.057g/L.Ca (OH) under same condition2Ratio CaCO3Solvability in water is much bigger, it is ensured that unsaturated Ca (OH)2Solution produces the CaCO of q.s3Precipitation Thing, will not mix Ca (OH) simultaneously in sediment2Solid, also will not be mixed into other impurity.
According to above-mentioned reaction principle, can configure and unsaturated eliminate CO2Ca (OH)2Solution, is placed in and needs concentration to take In the air ambient of sample, retain the sufficiently long time, the CO in air2CaCO can be generated with solution generation chemical reaction3Precipitation Thing, collects sediment, can realize to CO in air2Concentration solidification sampling, in error allowed band, sedimentary carbon unit Element, is only derived from the CO in sampling environment air2.
Therefore in the gas phase carbon dioxide of the present invention, solidification and the sampling method of carbon comprise the following steps that：
Step 1, preparation are without CO2Pure water；
Step 2, configure undersaturated Ca (OH)2Solution；
Step 3, by described undersaturated Ca (OH)2Solution opens wide and is placed in the air ambient needing sampling, keeps solution It is fully contacted with air, make CaCO3Sediment separates out；
Step 4, CaCO will be carried3Sedimentary Ca (OH)2Solution filters, and collects CaCO3Sediment.
Wherein, step 1 is prepared without CO2The method of pure water be to inject distilled water in flask, boil 10min, immediately Stopper with the plug equipped with soda lime pipe, obtain after cooling.
Step 2 configures undersaturated Ca (OH)2The method of solution is to weigh analytically pure Ca (OH)2Put into step 1 to prepare Without CO2Pure water in, closing shakes up, and is placed in the vial with plug standby.
The invention have the advantages that：The present invention generates calcium carbonate solid according to carbon dioxide with calcium hydroxide reaction Sedimentary feature, by the rare carbon dioxide in air, concentrates and is fixed in calcium carbonate, further to be divided Analysis, detection and test, can be applicable in the correlation test of karst area fundamental research and engineering Application Research, it is possible to application Relate to gas phase carbon dioxide or the sampling producing gas phase carbon dioxide and detection field in other.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1：
In the power station seepage preventing curtain grouting gallery of carbonate rock area, common substantial amounts of white precipitate, its material becomes Divide predominantly CaCO3, multiple saying is had to its source, the dissolving of limestone and recrystallization formation may be.It is likely to as antiseepage Ca (OH) in cement calculus in curtain2After dissolving, take, by permeating current, the CO meeting in air out of2Rear recrystallization is formed.Need for this CaCO to be followed the trail of3The source of C in precipitate, according to above-mentioned carbon dioxide fixation and sampling method, achieves seepage preventing curtain grouting CO in gallery air2Sample, carry out C isotope test.Test procedure and method are as follows：
1. prepare in the lab without CO2Pure water, inject distilled water in flask, boil 10min, immediately with equipped with sodium The plug of lime pipe stoppers, cooling.Amount to preparation 5 bottles of each 1L without CO2Pure water.
2. the undersaturated Ca (OH) of laboratory configuration2Solution, respectively weighs the analytically pure Ca of 1.2g (OH) respectively2Put into 1L Above-mentioned without CO2Pure water in, closing shakes up, and is placed in the vial with plug standby.Amount to the Ca (OH) preparing 3 1L volumes2 Solution.
3. by above-mentioned 3 undersaturated Ca (OH)2Solution is transported in some hydropower station seepage preventing curtain grouting gallery, opens wide and is placed in The more gallery section of precipitate, keeps solution to be fully contacted with air, to CaCO3Sediment collects solution after fully separating out, close Envelope takes back laboratory.
4. by above-mentioned band CaCO3Sedimentary Ca (OH)2Solution filters in the lab, collects CaCO3Sediment, Send the detection that laboratory is related to of C isotope detection and research.
Measure the C isotopics in precipitate, it was demonstrated that the C isotopics in precipitate and CO in gallery simultaneously2Middle C Isotopics are consistent, thus confirm that in gallery, precipitate source is Ca (OH) in cement calculus2Dissolving.
Certainly, more than be the present invention concrete exemplary applications, the present invention also has other embodiment, all employings be equal to The technical scheme that replacement or equivalent transformation are formed, all falls within protection domain of the presently claimed invention.

Claims (3)

1. the solidification of carbon and sampling method in a gas phase carbon dioxide, it is characterised in that comprise the steps：
Step 1, preparation are without CO2Pure water；
Step 2, configure undersaturated Ca (OH)2Solution；
Step 3, by described undersaturated Ca (OH)2Solution opens wide and is placed in the air ambient needing sampling, keeps solution and air It is fully contacted, make CaCO3Sediment separates out；
Step 4, CaCO will be carried3Sedimentary Ca (OH)2Solution filters, and collects CaCO3Sediment.
2. the solidification of carbon and sampling method in gas phase carbon dioxide according to claim 1, it is characterised in that：Step Described in 1, preparation is without CO2The method of pure water be to inject distilled water in flask, boil 10min, immediately with equipped with soda lime pipe Plug stoppers, and obtains after cooling.
3. the solidification of carbon and sampling method in gas phase carbon dioxide according to claim 2, it is characterised in that：Step Undersaturated Ca (OH) is configured described in 22The method of solution is to weigh analytically pure Ca (OH)2Put into step 1 prepare without CO2's In pure water, closing shakes up, and is placed in the vial with plug standby.
CN201610780179.6A 2016-08-31 2016-08-31 Curing and sampling method for carbon in gas phase carbon dioxide Pending CN106442022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Citations (11)

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Publication number Priority date Publication date Assignee Title
CN1466675A (en) * 2000-09-25 2004-01-07 ��V��ҩ��ʽ���� Isotopic gas analyzer and method of judging absorption capacity of crbon dioxide absorbent
CN200947069Y (en) * 2006-09-20 2007-09-12 深圳市中核海得威生物科技有限公司 Carbon dioxide collector with filtering water vapor
CN101379388A (en) * 2006-02-03 2009-03-04 大塚制药株式会社 Method of exhaled gas measuring and analysis and apparatus thereof
CN101419208A (en) * 2008-11-29 2009-04-29 太原理工大学 Method for resolving collinearity problem in origin parse for particles in air
CN101959574A (en) * 2007-12-28 2011-01-26 缠绕机公司 Method of removing and solidifying carbon dioxide from a fluid stream and fluid separation assembly
CN102589936A (en) * 2012-01-12 2012-07-18 中国科学院地理科学与资源研究所 Device and method for synchronously collecting atmosphere CO2 and water vapor samples
CN103143256A (en) * 2011-12-06 2013-06-12 财团法人工业技术研究院 Recycle of CO2Deactivated absorbent and sequestered CO of capture system2Method (2)
CN103226128A (en) * 2013-04-10 2013-07-31 太原理工大学 Method for analyzing source of secondary organic carbon in ambient air fine particles
CN103424462A (en) * 2013-08-23 2013-12-04 中国科学院寒区旱区环境与工程研究所 Enrichment analysis instrument of carbon and nitrogen of greenhouse gases of CO2 and N2O
CN103616477A (en) * 2013-11-13 2014-03-05 中国科学院地球化学研究所 Method for measuring daily mean stable carbon isotope composition of atmospheric carbon dioxide
CN103988073A (en) * 2011-11-02 2014-08-13 贝科技术有限公司 Measurement device and method for detecting the hydrocarbon content in gases

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1466675A (en) * 2000-09-25 2004-01-07 ��V��ҩ��ʽ���� Isotopic gas analyzer and method of judging absorption capacity of crbon dioxide absorbent
CN101379388A (en) * 2006-02-03 2009-03-04 大塚制药株式会社 Method of exhaled gas measuring and analysis and apparatus thereof
CN200947069Y (en) * 2006-09-20 2007-09-12 深圳市中核海得威生物科技有限公司 Carbon dioxide collector with filtering water vapor
CN101959574A (en) * 2007-12-28 2011-01-26 缠绕机公司 Method of removing and solidifying carbon dioxide from a fluid stream and fluid separation assembly
CN101419208A (en) * 2008-11-29 2009-04-29 太原理工大学 Method for resolving collinearity problem in origin parse for particles in air
CN103988073A (en) * 2011-11-02 2014-08-13 贝科技术有限公司 Measurement device and method for detecting the hydrocarbon content in gases
CN103143256A (en) * 2011-12-06 2013-06-12 财团法人工业技术研究院 Recycle of CO2Deactivated absorbent and sequestered CO of capture system2Method (2)
CN102589936A (en) * 2012-01-12 2012-07-18 中国科学院地理科学与资源研究所 Device and method for synchronously collecting atmosphere CO2 and water vapor samples
CN103226128A (en) * 2013-04-10 2013-07-31 太原理工大学 Method for analyzing source of secondary organic carbon in ambient air fine particles
CN103424462A (en) * 2013-08-23 2013-12-04 中国科学院寒区旱区环境与工程研究所 Enrichment analysis instrument of carbon and nitrogen of greenhouse gases of CO2 and N2O
CN103616477A (en) * 2013-11-13 2014-03-05 中国科学院地球化学研究所 Method for measuring daily mean stable carbon isotope composition of atmospheric carbon dioxide

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