GB/T 37355-2019Test method of mercury removal rate for activated carbon mercury removal catalyst (English PDF)
活性炭脱汞催化剂脱汞率试验方法
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for GB/T 37355-2019 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 25, 2019
Implementation date
February 1, 2020
Scope
GB/T 37355-2019 is the English-translated version of 活性炭脱汞催化剂脱汞率试验方法.
GB/T 37355-2019 specifies the test method for the mercury removal rate of an activated carbon mercury removal catalyst.
Clause 1 limits it to catalysts that take activated carbon as the carrier and elemental sulfur, sulfide and metal oxide as active components and are mainly used to remove mercury from natural gas, synthesis gas, refinery gas and industrial tail gas, and lists no other exclusions.
Clause 3, Principle, states that trace mercury in the feed gas is removed by physical adsorption and chemical reaction under the action of the catalyst, and that determining the mass concentration of mercury at the inlet and the outlet of the reactor allows the mercury capacity of the catalyst, and hence its mercury removal rate, to be calculated.
Clause 4 describes the test devices, clause 5 the samples, clause 6 the test steps and clause 7 the processing of the test data, and two normative annexes cover the determination of the compact density of the catalyst specimen and the flow correction of the rotameter.
Clause 6 takes the operator through filling the reaction tube and topping it with glass cloth and quartz sand, a leakage test in which the closed system is raised to 0.1 MPa with nitrogen and every joint is checked with soap water before the system is vented back to atmospheric pressure, and the mercury absorption run itself, held at a water bath temperature of 35 C, a reactor temperature of 25 C and a volumetric space velocity of 10000 per hour, with the inlet and outlet mercury concentrations read every 2 hours, then every 30 minutes once the mercury in the exhaust gas is found to increase, and the mercury generator switched off when a reading above 100 micrograms per cubic metre is confirmed by an immediate repeat determination.
For the concentration itself the mercury is absorbed in 30 mL of a potassium permanganate and sulfuric acid solution, 100 mL of gas being taken at the inlet and 300 mL at the outlet, an aliquot of the absorption fluid being made up in a 100 mL volumetric flask and then measured by atomic absorption spectroscopy as provided in GB/T 16781.1.
Annex A determines the compact density by compacting the specimen to 10 mL in a measuring cylinder, weighing it to the nearest 0.01 g and taking the arithmetic mean of the parallel measurements, whose relative error shall not be greater than 2.0%.
Clause 2 cites GB/T 6003.1, GB/T 6679 and GB/T 16781.1. It was issued on March 25, 2019 and has applied since February 1, 2020.
Found what you need?
Document preview — GB/T 37355-2019
National Standard of the People's Republic of China
- ICS
- 71.100.99
- Classification
- G 74
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Normative references4
- 3 Principle4
- 4 Test devices4
- 5 Samples6
- 6 Test steps6
- 7 Test data processing8
- Annex A (normative) Determination of compact density of catalyst specimen9
- Annex B (normative) Flow correction of rotameter10
1 Scope
This Standard specifies the test method of mercury removal rate for activated carbon mercury removal catalyst.
This Standard is applicable to activated carbon mercury removal catalyst that takes activated carbon as carrier; elemental sulfur, sulfide and metal oxide as active components, that is mainly used for removing mercury from natural gas, synthesis gas, refinery gas and industrial tail gas.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 6003.1, Test sieves - Technical requirements and testing - Part 1: Test sieves of metal wire cloth
GB/T 6679, General rules for sampling solid chemical products
GB/T 16781.1, Natural gas - Determination of mercury - Part 1: Sampling of mercury by chemisorption on iodine
3 Principle
Trace mercury in feed gas under the action of catalyst, due to physical adsorption and chemical reaction, is removed. Through the determination of the mass concentration of mercury at the inlet and outlet of the reactor, calculate the mercury capacity of the catalyst, so as to characterize the mercury removal rate of the catalyst.
4 Test devices
4.1 Devices
6 Test steps
to make the test material filled tight, uniform and flat. Then put on a glass cloth.
Use quartz sand to fill to a position that is about 5mm from the inlet cross section of the reaction tube. Connect the reaction tube into the system.
6.3 System leakage test
Close all outlet and vent valves of the system. Make access to nitrogen. Boost the system to 0.1MPa. Close the system inlet valve. Use soap water to check the connection of each joint to test leakage. After the leakage test meets the requirements, open the system outlet valve to vent to reduce the system pressure to atmospheric pressure.
6.4 Absorption of mercury
Raise the temperature of the water bath to 35°C. Maintain the temperature constant. Make the system access to nitrogen. Control and adjust the system pressure as constant pressure, reactor temperature as 25°C and volumetric space velocity as 10000h-1 (see Annex B for gas-related flow correction).
Meanwhile, record the initial reading of the wet gas flowmeter. After several hours (depending on the removal rate of mercury removal catalyst), start determining the mass concentration of mercury in the inlet and outlet of the reactor, once every 2h. When the mercury concentration in the exhaust gas is found to increase, determine once every 30min. When the mass concentration of mercury exceeds 100µg/m3, it shall immediately and continuously determine twice. If the determination result still exceeds 100µg/m3, it shall immediately turn off the mercury generator. At the same time, record the end reading of the wet gas flowmeter.
6.5 Determination of mercury mass concentration
6.5.1 Mass concentration of inlet mercury
Take an absorption bottle that is filled with 30mL of potassium permanganate-sulfuric acid solution (one volume of 40g/L potassium permanganate, one volume of 1+1 sulfuric acid solution and two volumes of water) to absorb 100mL of inlet gas. Measure 2.00mL of absorption fluid and move to a 100mL volumetric flask. Set constant volume and shake well. Then, according to the provisions of GB/T 16781.1, use atomic absorption spectroscopy to determine the mercury mass concentration.
6.5.2 Mass concentration of outlet mercury
Take an absorption bottle that is filled with 30mL of potassium permanganate-sulfuric acid solution (one volume of 40g/L potassium permanganate, one volume of 1+1 sulfuric acid solution and two volumes of water) to absorb 300mLof outlet gas. Measure 10.00mL of absorption fluid and move to a 100mL volumetric flask. Set constant volume and shake well. Then, according to the […]
Annex A (normative) Determination of compact density of catalyst specimen
A.1 Specimen accumulation
Divide an appropriate amount of specimen (see 5.2) into several portions. Add 25mL into a measuring cylinder in sequence. In each addition, it needs to shake the cylinder up and down several times until the position of the specimen in the measuring cylinder does not change to compaction. Repeat the operation till the compacted sample volume is 10mL.
A.2 Weighing of specimen
Weigh the mass of 10mL of compacted specimen (see A.1), to the nearest of 0.01g.
A.3 Calculation of compact density
The compact density rho, in grams per milliliter (g/mL), is calculated according to formula (A.1):
Where, m2 - Values of mass of 25mL measuring cylinder and mass of 10mL of specimen, in grams (g); m1 - Value of mass of 25mL measuring cylinder, in grams (g); V - Value of specimen's volume, in milliliters (mL).
Calculation results are retained to two digits after the decimal point. Take the arithmetic mean of the parallel measurement results as the measurement results. The relative error of parallel determination results shall not be greater than 2.0%. […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
How to Download GB/T 37355-2019
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 16781.1-2017 — Natural gas -- Determination of mercury -- Part 1: Sampling of mercury by chemisorption on iodine
GB/T 6003.1-2022 — Test sieves—Technical requirements and testing—Part 1:Test sieves of metal wire cloth
GB/T 6679-2003 — General rules for sampling solid chemical products
Secure payment via Stripe
Payments accepted
GB/T 37355-2019
$150.00