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GB/T 7702.7-2023: Test method for granular activated carbon from coal - Part 7: Determination of iodine number
Status: Valid GB/T 7702.7: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 7702.7-2023 | English | 199 |
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Test method for granular activated carbon from coal - Part 7: Determination of iodine number
| Valid |
GB/T 7702.7-2023
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| GB/T 7702.7-2008 | English | 85 |
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Test method for granular activated carbon from coal -- Determination of iodine number
| Obsolete |
GB/T 7702.7-2008
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| GB/T 7702.7-1997 | English | 199 |
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Standard test method for granular activated carbon from coal--Determination of iodine number
| Obsolete |
GB/T 7702.7-1997
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| GB/T 7702.7-1987 | English | RFQ |
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Standard test Method for iodine number of granular activated carbon from coal
| Obsolete |
GB/T 7702.7-1987
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PDF similar to GB/T 7702.7-2023
Basic data | Standard ID | GB/T 7702.7-2023 (GB/T7702.7-2023) | | Description (Translated English) | Test method for granular activated carbon from coal - Part 7: Determination of iodine number | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D24 | | Classification of International Standard | 75.160.10 | | Word Count Estimation | 9,984 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-05-23 | | Older Standard (superseded by this standard) | GB/T 7702.7-2008 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 7702.7-2023: Test method for granular activated carbon from coal - Part 7: Determination of iodine number
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 75:160:10
CCSD24
National Standards of People's Republic of China
Replace GB/T 7702:7-2008
Test method for coal-based granular activated carbon
Part 7: Determination of iodine adsorption value
Released on 2023-05-23
2023-05-23 Implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document is part 7 of GB/T 7702 "Test methods for coal-based granular activated carbon": GB/T 7702 has issued the following
part:
--- Part 1: Determination of moisture;
--- Part 2: Determination of particle size;
--- Part 3: Determination of strength;
--- Part 4: Determination of packing density;
--- Part 5: Determination of water capacity;
--- Part 6: Determination of methylene blue adsorption value;
--- Part 7: Determination of iodine adsorption value;
--- Part 8: Determination of phenol adsorption value;
--- Part 9: Determination of ignition point;
--- Part 10: Determination of protection time for benzene vapor and ethyl chloride vapor;
--- Part 13: Determination of carbon tetrachloride adsorption rate;
--- Part 14: Determination of sulfur capacity;
--- Part 15: Determination of ash;
--- Part 16: Determination of pH value;
--- Part 17: Determination of floating rate;
--- Part 18: Determination of caramel decolorization rate;
--- Part 19: Determination of carbon tetrachloride desorption rate;
--- Part 20: Determination of pore volume and specific surface area:
This document replaces GB/T 7702:7-2008 "Test method for determination of iodine adsorption value of coal-based granular activated carbon", and GB/T 7702:7-
Compared with:2008, except for structural adjustment and editorial changes, the main technical changes are as follows:
a) Changed the scope of application of the standard (see Chapter 1, Chapter 1 of the:2008 edition);
b) Added oscillator (see 6:4);
c) The oscillation mode has been changed (see 8:1:4, 8:4 of the:2008 edition);
d) Add the analysis method with iodine adsorption value less than 600mg/g (see 8:2);
e) The precision has been changed (see 10:2, Chapter 10 of the:2008 edition):
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed and managed by China North Industries Group Corporation:
This document is drafted by: Shanxi Xinhua Chemical Defense Equipment Research Institute Co:, Ltd:, China Ordnance Industry Standardization Institute:
The main drafters of this document: Huang Jimin, Zhou Xiaodong, Zhang Runhui, Liu Yadong, Song Xiufeng, Zhang Pengfei, Song Zhenchao, Wu Huien, Zhang Chongjie,
Xing Haoyang, Wen Weili, Jin Yanren, Hu Lan, Yin Zhaodong, Du Ping, Lin Na, Wang Dongze, Fei Zhuoxin:
This document was first released in 1987, revised for the first time in:1997, revised for the second time in:2008, and this is the third revision:
Introduction
GB/T 7702:7 mainly involves the determination of the iodine adsorption value of coal-based granular activated carbon: GB/T 7702:7 aims to improve the accuracy of analysis,
To shorten the analysis cycle, GB/T 7702 is proposed to be composed of 20 parts:
--- Part 1: Determination of moisture: The purpose is to evaluate the water content of activated carbon and provide a basis for subsequent customer use:
--- Part 2: Determination of particle size: The purpose is to evaluate the particle size distribution of activated carbon:
--- Part 3: Determination of strength: The purpose is to evaluate the wear resistance of activated carbon under certain conditions:
--- Part 4: Determination of packing density: The purpose is to evaluate the bulk weight of activated carbon, which can provide users with the volume of activated carbon per unit volume:
The quality, to provide users with the filling volume of the design basis in the process of use:
--- Part 5: Determination of water capacity: The purpose is to evaluate the total pore volume of activated carbon, which is a rapid detection method in the production process of activated carbon:
A practical approach:
--- Part 6: Determination of methylene blue adsorption value: The purpose is to evaluate the adsorption capacity of activated carbon submicropores, which is the liquid phase decolorization of activated carbon:
It is a main characterization method for the capacity of activated carbon, which is commonly used for evaluation when activated carbon is used for liquid phase adsorption:
--- Part 7: Determination of iodine adsorption value: The purpose is to evaluate the microporous adsorption capacity of activated carbon, which is an indicator of the gas phase adsorption capacity of activated carbon:
A primary characterization method commonly used to evaluate activated carbons for gas phase adsorption:
--- Part 8: Determination of phenol adsorption value: The purpose is to evaluate the adsorption capacity of activated carbon for alkanes:
--- Part 9: Determination of ignition point: The purpose is to evaluate the ignition point of activated carbon and provide design basis for users when using it:
--- Part 10: Determination of protection time for benzene vapor and ethyl chloride vapor: The purpose is to evaluate the protective performance of activated carbon:
--- Part 13: Determination of carbon tetrachloride adsorption rate: The purpose is to evaluate the saturated adsorption capacity of activated carbon for volatile organic compounds, mainly
It is used for activated carbon gas phase adsorption, and it is generally used for VOC adsorption:
--- Part 14: Determination of sulfur capacity: The purpose is to evaluate the static sulfur adsorption capacity of activated carbon, which is mainly used for raw gas desulfurization
A sign of ability:
--- Part 15: Determination of ash: The purpose is to evaluate the degree of oxidation of oxides of elements other than carbon in activated carbon:
--- Part 16: Determination of pH value: The purpose is to evaluate the acidity and alkalinity of the solution after the activated carbon is immersed in water:
--- Part 17: Determination of buoyancy rate: The purpose is to evaluate the floating rate of activated carbon, which is the floating ash and bubbles on the surface of activated carbon in water:
The sum of the content of the material:
--- Part 18: Determination of caramel decolorization rate: The purpose is to evaluate the decolorization ability of macropores in activated carbon, mainly used in liquid phase organic
Characterization of the ability of macromolecules to adsorb:
--- Part 19: Determination of carbon tetrachloride desorption rate: The purpose is to evaluate the ability of activated carbon to remove organic matter:
--- Part 20: Determination of pore volume and specific surface area: The purpose is to evaluate the pore distribution and adsorption capacity of the activated carbon:
--- Part 21: Determination of liquid phase dynamic adsorption capacity: The purpose is to evaluate the dynamic removal of soluble pollutants in water by activated carbon adsorption
ability:
--- Part 22: Determination of liquid phase static adsorption capacity: The purpose is to evaluate the adsorption of soluble pollutants in water by activated carbon static removal
ability:
Test method for coal-based granular activated carbon
Part 7: Determination of iodine adsorption value
1 Scope
This document describes the method for the determination of the iodine adsorption value of coal-based granular activated carbon, including the principle, reagents and materials, instruments and equipment, and preparation of samples:
Preparation, measurement procedure, measurement data processing, precision and test report:
This document applies to the determination of the iodine adsorption value of coal-based granular activated carbon, and also applies to the determination of the iodine adsorption value of other shapes of activated carbon:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
Preparation of GB/T 601-2016 Chemical Reagent Standard Titration Solutions
GB/T 603-2002 Preparation of preparations and products used in test methods for chemical reagents
GB/T 622 chemical reagent hydrochloric acid
GB/T 675 Chemical Reagent Iodine
GB/T 1272 Chemical Reagent Potassium Iodide
GB/T 1914 Chemical analysis filter paper
GB/T 6682 Analytical laboratory water specifications and test methods
3 Terms and Definitions
The following terms and definitions apply to this document:
3:1
Under the specified test conditions, after the activated carbon and the iodine solution are fully shaken, the number of milligrams of iodine adsorbed:
3:2
Iodine adsorption value iodinenumber
The mass of iodine adsorbed per gram of activated carbon:
Note: The unit is expressed in milligrams per gram:
4 principles
Under the specified conditions, after the quantitative activated carbon sample and the iodine standard titration solution are fully oscillated and adsorbed, the remaining iodine in the solution is determined by titration:
Calculate the number of milligrams of iodine adsorbed per gram of activated carbon sample:
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