TY - JOUR
T1 - In-situ FTIR investigation of coke formation on USY zeolite
AU - Li, Chiuping
AU - Chen, Yu Wen
AU - Yang, Shien Jeng
AU - Yen, Ruey Bing
N1 - Funding Information:
This research was supported by the National Science Council and Chinese Petroleum Company of the Republic of China.
PY - 1994/12/1
Y1 - 1994/12/1
N2 - Coke formation over USY and steamed USY zeolites was investigated by in-situ FTIR spectroscopy, i.e., an IR cell which simultaneously serves as a reactor using n-hexane cracking as a test reaction and which is attached to a gas chromatograph. The rate of coke formation and catalyst de-activation increased with increasing the concentration of acid sites. The de-activation during n-hexane cracking can be divided into two periods. During the first stage of coke formation, the activity decreased linearly with coke formation. At this stage, coke was predominantly deposited on the Brønsted acid site inside the zeolite structure. In the second stage, which met with a higher coke content, the activity was much less affected by further coke formation. At this stage, coke grew mainly outside the zeolite pores.
AB - Coke formation over USY and steamed USY zeolites was investigated by in-situ FTIR spectroscopy, i.e., an IR cell which simultaneously serves as a reactor using n-hexane cracking as a test reaction and which is attached to a gas chromatograph. The rate of coke formation and catalyst de-activation increased with increasing the concentration of acid sites. The de-activation during n-hexane cracking can be divided into two periods. During the first stage of coke formation, the activity decreased linearly with coke formation. At this stage, coke was predominantly deposited on the Brønsted acid site inside the zeolite structure. In the second stage, which met with a higher coke content, the activity was much less affected by further coke formation. At this stage, coke grew mainly outside the zeolite pores.
UR - http://www.scopus.com/inward/record.url?scp=0028742773&partnerID=8YFLogxK
U2 - 10.1016/0169-4332(94)90051-5
DO - 10.1016/0169-4332(94)90051-5
M3 - 期刊論文
AN - SCOPUS:0028742773
SN - 0169-4332
VL - 81
SP - 465
EP - 468
JO - Applied Surface Science
JF - Applied Surface Science
IS - 4
ER -