caa a22 4500 606226044 CHVBK 20210128101151.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s10553-015-0598-5 doi (NATIONALLICENCE)springer-10.1007/s10553-015-0598-5 Experimental Failure-Mechanism Analysis of 4A Zeolites Used for Natural-Gas Drying [Elektronische Daten] [Changjun Li, Wenlong Jia, Xia Wu] Scanning electron microscopic (SEM), nitrogen absorption—desorption, and thermogravimetric experiments were conducted on one fresh 4A zeolite and three regenerated 4A zeolite samples taken from the top, middle, and bottom of a natural-gas dehydration bed. The results showed that parts of the regenerated zeolite are blocked due to collapse of the zeolite structure. As a result, the specific surface area, average pore volume, and average pore diameter of regenerated zeolite taken from the middle of the dehydration bed are less by about 59.15, 68.36, and 32.12%, respectively, than those of fresh zeolite. Because water molecules cannot enter the internal pores due to blockage caused by collapse of the zeolite structure, the gas-dehydration performance of the regenerated zeolites is reduced. Thermogravimetric analysis of zeolites that adsorbed water showed that the water-adsorption performance of the regenerated zeolites is 35.53% less and the hydrocarbon-adsorption performance of these zeolites is 18.95% greater than those of fresh zeolite. Springer Science+Business Media New York, 2015 4A zeolite nationallicence natural gas nationallicence adsorption drying nationallicence failure mechanism nationallicence experiments nationallicence Li Changjun School of Petroleum Engineering, Southwest Petroleum University (China), Chengdu, China aut Jia Wenlong School of Petroleum Engineering, Southwest Petroleum University (China), Chengdu, China aut Wu Xia School of Petroleum Engineering, Southwest Petroleum University (China), Chengdu, China aut Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 51/3(2015-07-01), 245-251 0009-3092 51:3<245 2015 51 10553 https://doi.org/10.1007/s10553-015-0598-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10553-015-0598-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Changjun School of Petroleum Engineering, Southwest Petroleum University (China), Chengdu, China aut NATIONALLICENCE 700 1- Jia Wenlong School of Petroleum Engineering, Southwest Petroleum University (China), Chengdu, China aut NATIONALLICENCE 700 1- Wu Xia School of Petroleum Engineering, Southwest Petroleum University (China), Chengdu, China aut NATIONALLICENCE 773 0- Chemistry and Technology of Fuels and Oils Springer US; http://www.springer-ny.com 51/3(2015-07-01), 245-251 0009-3092 51:3<245 2015 51 10553