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A method for testing the desulfurization performance of catalytic cracking regenerated flue gas sulfur transfer additives

A technology of sulfur transfer additives and catalytic cracking, which is applied in chemical method analysis, detection of element existence through oxidation, and measurement devices, which can solve problems such as inaccurate desulfurization test data, and achieve the effect of easy method and accurate test results

Active Publication Date: 2020-11-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for testing the desulfurization performance of catalytic cracking regenerated flue gas sulfur transfer additives, so as to overcome the inaccurate defect of the desulfurization test data of sulfur transfer additives in the prior art

Method used

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  • A method for testing the desulfurization performance of catalytic cracking regenerated flue gas sulfur transfer additives
  • A method for testing the desulfurization performance of catalytic cracking regenerated flue gas sulfur transfer additives
  • A method for testing the desulfurization performance of catalytic cracking regenerated flue gas sulfur transfer additives

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Experimental program
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Effect test

Embodiment 1

[0045] (1) Carry out a blank test.

[0046] At room temperature, 50 g of unborn catalytic cracking catalyst without sulfur transfer aids are charged figure 1 The fixed fluidized bed reactor of catalytic cracking regenerated flue gas sulfur transfer additive performance evaluation device, the high-purity nitrogen gas with a flow rate of 1L / min is introduced into the reactor, and the temperature of the reactor is raised to 5°C / min at a rate of 700°C, while using an online flue gas analyzer to monitor SO in the exhaust gas 2 The curve of the instantaneous concentration with time is as figure 2 As shown, calculate the SO 2 Integral value S of instantaneous concentration versus time 10 33920mg / m 3 ·s.

[0047] Maintain the temperature of the reactor at 700°C, stop feeding high-purity nitrogen, and feed a mixed gas of nitrogen and oxygen with a flow rate of 1L / min and an oxygen volume concentration of 2% into the reactor, and use an online flue gas analyzer to monitor the tail...

Embodiment 2

[0051] (1) Carry out a blank test.

[0052] At room temperature, 60 g of the spent catalytic cracking catalyst without sulfur transfer aids were charged figure 1 In the fixed fluidized bed reactor of the catalytic cracking regenerated flue gas sulfur transfer additive performance evaluation device, high-purity nitrogen gas with a flow rate of 0.5L / min is introduced into the reactor, and the temperature of the reactor is increased at a rate of 5°C / min. to 700°C, while using an online flue gas analyzer to monitor SO in the exhaust gas 2 The curve of the instantaneous concentration with time is as Figure 4 As shown, calculate the SO 2 Integral value S of instantaneous concentration versus time 10 36621mg / m 3 ·s.

[0053] Maintain the temperature of the reactor at 700°C, stop feeding high-purity nitrogen, and feed a mixture of nitrogen and oxygen with a flow rate of 0.5L / min and an oxygen volume concentration of 4% into the reactor, while monitoring with an online flue gas a...

Embodiment 3

[0057] (1) Carry out a blank test.

[0058] At room temperature, 80 g of unborn catalytic cracking catalyst without sulfur transfer aids were charged figure 1 In the fixed fluidized bed reactor of the catalytic cracking regenerated flue gas sulfur transfer additive performance evaluation device, high-purity nitrogen gas with a flow rate of 0.7L / min is introduced into the reactor, and the temperature of the reactor is increased at a rate of 5°C / min. to 700°C, while using an online flue gas analyzer to monitor SO in the exhaust gas 2 The curve of the instantaneous concentration with time is as Figure 6 As shown, calculate the SO 2 Integral value S of instantaneous concentration versus time 10 30521mg / m 3 ·s.

[0059] Maintain the temperature of the reactor at 700°C, stop feeding high-purity nitrogen, and feed a mixture of nitrogen and oxygen with a flow rate of 0.7L / min and an oxygen volume concentration of 6% into the reactor, while monitoring with an online flue gas anal...

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Abstract

The invention discloses a desulfurization performance testing method for a catalytic cracking regenerated flue gas sulfur transfer agent. The desulfurization performance testing method includes the steps (1), filling a reactor with a spent catalytic racking catalyst, leading in high-purity nitrogen gas, raising temperature to 650-750 DEG C, monitoring concentration variation of SO2 generated during temperature raising and holding through an online flue gas analysis instrument until the concentration of SO2 becomes zero, and then calculating integral value S10 of instantaneous concentration ofSO2 to time; (2), keeping temperature of the reactor at 650-750 DEG C, leading in mixture gas of oxygen and nitrogen gas, monitoring concentration variation of SO2 generated after leading in of the mixture gas along with change of time through the online flue gas analysis instrument until the concentration of SO2 becomes zero, and the calculating integral value S11 of instantaneous concentration of SO2 to time; (3), adding the sulfur transfer agent in the spent catalytic racking catalyst, calculating the removal rate of SO2 of the sulfur transfer agent according to the integral values S10 andS11 of SO2 to time obtained in the step (1) and the step (2). The method has accurate testing results and is easy to implement.

Description

technical field [0001] The invention relates to a method for testing the desulfurization performance of catalytic cracking regenerated flue gas sulfur transfer additives. Background technique [0002] Sulfur oxides have many hazards. It is one of the main components of acid rain, and studies have found that it can promote the formation of PM10, causing problems in the human respiratory system. For the oil refining industry, as crude oil becomes increasingly inferior and heavy, the processing volume of high-sulfur or sulfur-containing crude oil is bound to gradually increase. Catalytic cracking is one of the main secondary processing processes in my country's oil refining enterprises. The emission of sulfur oxides in the gas will also increase significantly, and the corrosion of regenerator equipment is also a problem that cannot be ignored. [0003] The emission of sulfur oxides from catalytic cracking units accounts for 6%-7% of the total emissions in the air. Although its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/00
CPCG01N31/005
Inventor 刘其武郭成玉邢昕王骞李兆飞阎立军庞新梅李发永
Owner PETROCHINA CO LTD
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