Method for quickly detecting carbon deposition resistance performance of methane synthesis catalyst

Abstract

The invention relates to a method for quickly detecting the carbon deposition resistance performance of methane synthesis catalyst. The method comprises the following steps: flatly filling the catalyst into the constant-temperature section of a methanation reactor; two sides of the catalyst are isolated, pressure is built for testing leakage, air is introduced into a nitrogen replacement system, then, pressure is built, nitrogen stops being introduced, hydrogen reduction catalyst is introduced, nitrogen stops being introduced after reaction is finished, pressure is released, hydrogen in the system is replaced by nitrogen, temperature is raised, and pressure is built after a situation that no hydrogen is detected in the system is confirmed; then, raw material gas used for methanation reaction is introduced to carry out methanation reaction, the inlet and outlet gas composition of the methanation reactor is measured by a gas chromatograph, a molar ratio of the carbonic oxide to the carbon dioxide of the outlet of the reactor is measured, and reaction time and a pressure difference value generated until reaction is finished are recorded; a carbon deposition amount and a catalyst particle integrity rate are measured, and a detected parameter is used for judging the index of the carbon deposition resistance performance of the catalyst.

Description

technical field [0001] The invention relates to a method for quickly detecting the anti-carbon deposition performance of a methane synthesis catalyst. Background technique [0002] Methanation technology was first applied in ammonia synthesis process to remove CO and CO in raw gas 2 In the 1940s, foreign countries attached great importance to the research on methanation to produce qualified natural gas and city gas technology. In the early 1970s, domestic and foreign researches on replacing natural gas with coal, naphtha, etc. began to enter the 21st century. At home and abroad, the research on coke oven gas to natural gas technology has begun, and in recent years, the research on coal to natural gas technology has begun. These technologies use different gas sources to produce natural gas. Regardless of the gas source, the reaction formula is: [0003] CO+3H 2 →CH 4 +H 2 O (1) [0004] CO 2 +4H 2 →CH 4 +2H 2 O (2) [0005] CO+CO→C+CO 2 (3) [0006] When methane...

AI Technical Summary

Problems solved by technology

[0010] It can be seen that using this method to detect the anti-carbon deposition performance of methane synthesis catalysts, 1. It takes a long time, and there are too many uncontrollable factors in the detection process. Once an accident occurs, the experiment must be started from the beginning, and the work efficiency is low; Frequent ventilation increases the error rate and safety hazards, and the detection cost is high; 3. The detection process conditions are too mild, some indicators do not change significantly, and there are too few indicators to judge the anti-carbon deposition performance of the catalyst, and the accuracy is low

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