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GB/T 7702.14-2008 English PDF (GBT7702.14-2008)

GB/T 7702.14-2008 English PDF (GBT7702.14-2008)

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GB/T 7702.14-2008: Test method for granular activated carbon from coal -- Determination of sulphur capacity

This Part specifies the content such as principle, steps and result calculation for the determination of sulphur capacity of granular activated carbon from coal. This Part applies to the determination of sulphur capacity of granular activated carbon from coal. It also applicable to impregnated activated carbon.
GB/T 7702.14-2008
GB
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 75.160.10
D 24
Replacing GB/T 7702.14-1997, GB/T 7702.22-1997
Test Method for Granular Activated Carbon from
Coal - Determination of Sulphur Capacity
ISSUED ON. NOVEMBER 20, 2008
IMPLEMENTED ON. MAY 01, 2009
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the PEOPLE Republic of China;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Principle ... 6
4 Reagents and materials... 6
5 Instruments and equipment ... 7
6 Determination conditions ... 11
7 Preparation of specimen... 11
8 Determination preparations ... 12
9 Determination steps ... 14
10 Result calculation ... 15
11 Test reports ... 16
Foreword
GB/T 7702 "Test Method for Granular Activated Carbon from Coal" is divided into. ?€? Part 1. Determination of Moisture;
?€? Part 2. Determination of Particle Size;
?€? Part 3. Determination of Hardness;
?€? Part 4. Determination of Packing Density;
?€? Part5. Determination of Absorption of Water;
?€? Part 6. Determination of Methylene Blue Absorption;
?€? Part 7. Determination of Iodine Number;
?€? Part 8. Determination of Phenol Absorption;
?€? Part 9. Determination of Ignition Temperature;
?€? Part 10. Determination of Service Life against Benzene and Chloroethane Vapours;
?€? Part 13. Determination of CCL4 Vapour Absorption;
?€? Part14. Determination of Sulphur Capacity;
?€? Part 15. Determination of Ash Content;
?€? Part 16. Determination of pH Value;
?€? Part 17. Determination of Floatation Ratio;
?€? Part 18. Determination of Caramel Absorption;
?€? Part 19. Determination of Carbon Tetrachloride (CCl4) Desorption;
?€? Part 20. Determination of Pore Volume and Specific Surface Area.
This Part is part 14 of GB/T 7702.
This Part replaces GB/T 7702.14-1997 Standard test method for sulphur capacity of granular activated carbon from coal and GB/T 7702.22-1997 Standard test method for granular activated carbon from coal - Determination of breakthrough sulphur capacity. Compared with GB/T 7702.14-1997 and GB/T 7702.22-1997, the main changes of this Part are as follows.
a) Change the standard structural according to GB/T 1.1-2000 Directives for standardization - Part 1. Rules for the structure and drafting of standards and GB/T 20001.4-2001 Rules for drafting standards - Part 4. Methods of chemical analysis; b) Combine the GB/T 7702.14-1997 Standard test method for sulphur capacity of granular activated carbon from coal and GB/T 7702.22-1997 Standard test method for granular activated carbon from coal - Determination of breakthrough sulphur capacity into GB/T 7702.14-2008 Test method for granular activated carbon from coal - Determination of sulphur capacity;
c) Stipulate that the division value of timer is 0.1s;
d) Correct the volume fraction of oxygen of saturated sulphur capacity to be 0.6% ~ 1.0%;
e) Modify the metrological quantity and units according to regulations. This Part was proposed by China North Industries Group.
Drafting organization of this Part. Shanxi Xinhua Chemical Co., Ltd.
The main drafting staffs of this Part. Chi Guangxiu, Zhao Jijun, Li Weibing, Yuan Yidong, Zhang Xu, Pang Huisheng, and Li Ruomei.
This Part replaces the following historical editions.
?€? GB/T 7702.14-1987, GB/T 7702.14-1997;
?€? GB/T 7702.22-1987, GB/T 7702.22-1997.
Test Method for Granular Activated Carbon from Coal -
Determination of Sulphur Capacity
1 Scope
This Part specifies the content such as principle, steps and result calculation for the determination of sulphur capacity of granular activated carbon from coal. This Part applies to the determination of sulphur capacity of granular activated carbon from coal. It also applicable to impregnated activated carbon.
2 Normative??references
The following standards contain provisions which, through reference in this text, constitute provisions of this Part of GB/T 7702. For dated reference, the subsequent amendments (excluding correction) or revisions of these publications do not apply. However, the parties who enter into agreement based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 601-2002 Chemical Reagent - Preparations of Standard Volumetric Solutions GB/T 603-2002 Chemical Reagent - Preparations of Reagent Solutions for Use in Test Methods
GB/T 625 Chemical Reagent - Sulfuric Acid (GB/T 625-2007, ISO 6353-2. 1983, NEQ)
GB/T 631 Chemical Reagent - Ammonia Solution (GB/T 631-2007, ISO 6353-2. 1983, NEQ)
GB/T 676 Chemical Reagent - Acetic Acid (GB/T 676-2007, ISO 6353-2. 1983, NEQ) GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods (GB/T 6682-2008, ISO 3696.1987, MOD)
GB/T 7702.10-2008 Test Method for Granular Activated Carbon from Coal - Determination of Service Life Against Benzene and Chloroethane Vapours
GB/T 10500 Industrial Natrium Sulfide
WJ 2281 Verification Regulation of Float Meter for Protective Equipment Test constant-temperature drying oven at 150??C??5??C to dry for 2 h. Then place in dryer to cool down for later use.
7.2 Penetration sulfur capacity
Take about 200 g of specimen by using quartering method. Place in electrothermal constant-temperature drying oven at 150??C??5??C to dry for 2 h. Then place in the dryer to cool down for later use.
8 Determination??preparations
8.1 Instrument installation
Use rubber tube and glass tube to connect the various instrument parts in sequence according to the schematic diagrams (Figure 1, 2 and 3).
8.2 Air tightness inspection
8.2.1 Check the air tightness of the instruments connected before being used. 8.2.2 When checking air tightness, connect a pressure gauge at piston K2 (Figure 1). Close all pistons that are through the atmosphere. Access in the compressed air slowly. Close K1 when the internal pressure of the whole instrument reaches 13.3 kPa (gauge pressure). Observe the pressure change. If the pressure drop is less than 0.26 kPa within 1 min, the air tightness is qualified. Otherwise, find out the causes and handle the non-hermetic parts.
8.3 Air flow
The control of air flow shall meet the requirements of 9.3 in GB/T 7702.10-2008. 8.4 Humidity of air flow
The control of air flow humidity shall meet the requirements of Annex A in GB/T 7702.10-2008.
8.5 Determination of initial mass concentration of hydrogen sulfide
Inject 50 mL of zinc acetate solution, of which the mass concentration is 2%, into two in-series suction bottles. Remove the suction bottles after accessing gas for 20 min. Blow and wash the solution in the suction bottles into a 200 mL conical flask. Add excessive standard iodine solution (above 40 mL). Use starch as the indicator; use sodium thiosulfate standard titration solution to titrate the excessive iodine. The initial mass concentration of hydrogen sulfide, in ??0, its numeric value is expressed in mg/L, is calculated by Formula (1);
Where.
??0 ?€? initial concentration of hydrogen sulfide in mixed air flow, mg/L; qv ?€? flow rate of gas mixture through the determination tube, L/min;
tb ?€? penetration time when the volume fraction of hydrogen sulfide reaches 50??10-6, min;
m ?€? mass of specimen, g.
10.3 For each specimen, conduct the parallel determination of 2 test materials. The results are expressed in arithmetic mean value, and shall be accurate to the integer. 10.4 The difference between the 2 determination results shall not be greater than 10%. 11??Test??reports
The test report shall include the following contents.
a) Serial number of the sample;
b) The standards used;
c) The methods used;
d) Test items;
e) Test results;
f) Testing personnel;
g) Date of test.

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