Study on Rapid Aging Method of CNG Catalyst



WCX SAE World Congress Experience
Authors Abstract
China VI standards for heavy duty vehicles require that the mileage of CNG catalysts for vehicles with a maximum design total mass of more than 18 tons should reach 700000 km. In order to quickly evaluate the durability of CNG catalyst, muffle furnace aging and natural gas engine bench aging were usually adopted. The advantages of muffle furnace aging were simple operation, short time and low cost, but the aging atmosphere is quite different from the exhaust atmosphere of natural gas engine, which is difficult to reflect the actual durability of the catalyst. The aging of natural gas engine can reflect the durability of the catalyst, but it usually takes about 1000 hours. Due to long time, and high cost, it is difficult to be widely applied in the early stage of catalyst development. Therefore, it is a very interesting research direction to develop new methods with the advantages of muffle furnace aging and natural gas bench aging. In this work, the effect of water content on catalyst performance during muffle furnace aging was studied and compared with gasoline engine bench aging. It is found that the aging speed of the catalyst is accelerated when the water content increased from 10% to 20%. Gasoline engine bench aging for 50 hours can reach the aging level of muffle furnace with 20% water content for 20 hours, which is very important for guiding the establishment of a new rapid aging method of CNG catalyst.
Meta TagsDetails
Wang, W., Xu, S., Li, X., Xu, G. et al., "Study on Rapid Aging Method of CNG Catalyst," SAE Technical Paper 2022-01-0586, 2022,
Additional Details
Mar 29, 2022
Product Code
Content Type
Technical Paper