Natural gas engine test system for exhaust gas-fuel catalytic reforming and catalyst regeneration, and control method

Abstract

The invention discloses a natural gas engine test system for exhaust gas-fuel catalytic reforming and catalyst regeneration, and a control method. Partial exhaust gas waste heat is utilized to carry out an exhaust gas reforming hydrogen production reaction, the hydrogen-rich mixed gas generated by reforming is introduced into an engine to explore an influence rule of working parameters of a reformer on the engine performance and emission, and the matching of the reformer and the engine performance is realized. Meanwhile, for the catalyst deactivation problem in the reformer, a catalyst can bereduced online; in addition, after an experiment is finished, N2 is inflated into the reformer by a rack, an inert atmosphere is formed to protect the catalyst, and the problem of the catalyst deactivation caused by oxidation of residual exhaust gases inside the reformer in the cooling process is avoided.

Description

technical field [0001] The invention relates to the technical field of natural gas engine testing, in particular to a natural gas engine testing system and control method for exhaust gas-fuel catalytic reforming and catalyst regeneration. Background technique [0002] Exhaust gas-fuel reforming technology uses exhaust gas-fuel reformer to catalyze a small amount of fuel and part of exhaust gas to generate hydrogen-rich reformed gas by using the waste heat of high-temperature exhaust gas from the engine. The reformed gas contains H 2 、CH 4 And CO, etc., passing into the engine can improve engine combustion and reduce pollutant emissions. [0003] At present, the catalyst used in most exhaust gas fuel reformers is Ni-Rh / Al 2 o 3 etc. In the actual bench test, after a long time of catalytic reforming test, there are phenomena such as catalyst sintering, carbon deposition or oxidation of active sites, resulting in a decrease in catalyst activity. At the same time, after the...

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Problems solved by technology

Since the catalyst is usually installed in the tube bundle inside the reformer, it is not easy to remove and replace; on the one hand, the reformer is usually in a high temperature state when it is working, and the temperature of the catalyst on the surface and inside of the reactor is very high. The catalyst can only be taken out after cooling, and it takes time and effort to replace the new catalyst; on the other hand, the prepared reforming catalyst is usually expensive, and the cost of replacing the new catalyst is relatively high at this time

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