GB/T 36766-2018 in English

1. Scope and applicability of the standard

Platinum-palladium deoxidizer is suitable for the removal of oxygen from synthesis gas, nitrogen, hydrogen, ethylene and propylene. The standard clarifies the standardized process of the test method to ensure the consistency and reliability of the test results.

2. Test principle

The oxygen in the raw gas reacts with hydrogen or carbon monoxide to produce water or carbon dioxide: $$ 2H_2 + O_2 \rightarrow 2H_2O $$ $$ 2CO + O_2 \rightarrow 2CO_2 $$ The oxygen content at the inlet and outlet of the reactor is measured by an oxygen analyzer, and the deoxygenation rate is calculated to characterize the performance of the deoxidizer.

3. Experimental apparatus and performance

The experimental apparatus mainly includes raw gas cylinder, pressure reducing valve, mixing tank, flow meter, tubular reactor and oxygen analyzer. Key parameters include:

• Reactor isothermal zone: 50 mm
• Maximum operating pressure: 1.0 MPa (gauge pressure)
• Maximum operating temperature: 400°C

4. Sample preparation and processing

According to the provisions of GB/T 6679, samples are taken, and after sieving, drying and density testing, the test samples suitable for the test are obtained.

5. Deoxygenation rate determination steps

1. System leak test:Ensure that there is no leakage before proceeding with subsequent operations.
2. Temperature reduction:Raise the temperature to the activity measurement temperature according to the conditions in Table 2, and then switch to reducing gas.
3. Deoxygenation rate calculation: Use the formula \( E = \frac{\varphi_1 - \varphi_2}{\varphi_1} \times 100\% \), where \( \varphi_1 \) and \( \varphi_2 \) are the oxygen volume fractions in the feed gas and tail gas, respectively.

6. Implementation recommendations

• Ensure that the equipment is calibrated regularly, especially in terms of parallelism and reproducibility.
• Strictly follow the sample preparation process to avoid the influence of particle size or humidity on the test results.
• When operating in high temperature and high pressure environments, be sure to pay attention to safety precautions.