Catalytic Cracking of Cumene in a Riser Simulator:  A Catalyst Activity Decay Model

2001 ◽  
Vol 40 (23) ◽  
pp. 5398-5404 ◽  
Author(s):  
S. Al-Khattaf ◽  
H. de Lasa
Keyword(s):  
Catalytic Cracking ◽  
Catalyst Activity ◽  
Decay Model ◽  
Activity Decay ◽  
Catalytic Cracking Of Cumene

Catalyst activity decay due to pore blockage during catalytic cracking of hydrocarbons

Fuel ◽  
2013 ◽  
Vol 110 ◽  
pp. 89-98 ◽  
Author(s):  
Gladys Jiménez-García ◽  
Hugo de Lasa ◽  
Roberto Quintana-Solórzano ◽  
Rafael Maya-Yescas
Keyword(s):  
Catalytic Cracking ◽  
Catalyst Activity ◽  
Pore Blockage ◽  
Activity Decay

scholarly journals RESEARCH OF CATALYTIC CRACKING CATALYST ACTIVITY AT LINTEL MAC-10 UNIT

2020 ◽  
pp. 195
Author(s):  
Alina M. Munasypova ◽  
Aigul M. Rakhmangulova ◽  
Airat I. Akhunov ◽  
Olga Yu. Belousova ◽  
Rustem Sh. Yapaev
Keyword(s):  
Catalytic Cracking ◽  
Catalyst Activity

Biofuels Production from Catalytic Cracking of Palm Oil Using Modified HY Zeolite Catalysts over A Continuous Fixed Bed Catalytic Reactor

2020 ◽  
Vol 10 (1) ◽  
pp. 149-156
Author(s):  
I. Istadi ◽  
Teguh Riyanto ◽  
Luqman Buchori ◽  
Didi D. Anggoro ◽  
Andre W. S. Pakpahan ◽  
...  
Keyword(s):  
Palm Oil ◽  
Catalytic Cracking ◽  
Catalyst Activity ◽  
Alternative Fuel ◽  
Zeolite Catalysts ◽  
Impregnation Method ◽  
Promising Alternative ◽  
Hy Zeolite ◽  
X Ray ◽  
Catalyst Development

The increase in energy demand led to the challenging of alternative fuel development. Biofuels from palm oil through catalytic cracking appear as a promising alternative fuel. In this study, biofuel was produced from palm oil through catalytic cracking using the modified HY zeolite catalysts. The Ni and Co metals were impregnated on the HY catalyst through the wet-impregnation method. The catalysts were characterized using X-ray fluorescence, X-ray diffraction, Brunauer–Emmett–Teller (BET), Pyridine-probed Fourier-transform infrared (FTIR) spectroscopy, and Scanning Electron Microscopy (SEM) methods. The biofuels product obtained was analyzed using a gas chromatography-mass spectrometry (GC-MS) method to determine its composition. The metal impregnation on the HY catalyst could modify the acid site composition (Lewis and Brønsted acid sites), which had significant roles in the palm oil cracking to biofuels. Ni impregnation on HY zeolite led to the high cracking activity, while the Co impregnation led to the high deoxygenation activity. Interestingly, the co-impregnation of Ni and Co on HY catalyst could increase the catalyst activity in cracking and deoxygenation reactions. The yield of biofuels could be increased from 37.32% to 40.00% by using the modified HY catalyst. Furthermore, the selectivity of gasoline could be achieved up to 11.79%. The Ni and Co metals impregnation on HY zeolite has a promising result on both the cracking and deoxygenation process of palm oil to biofuels due to the role of each metal. This finding is valuable for further catalyst development, especially on bifunctional catalyst development for palm oil conversion to biofuels.

The Catalytic Cracking of Cumene Interpreted as a Chain Mechanism

1996 ◽  
Vol 159 (1) ◽  
pp. 246-248 ◽  
Author(s):  
S.P. Asprey ◽  
B.W. Wojciechowski
Keyword(s):  
Catalytic Cracking ◽  
Chain Mechanism ◽  
A Chain ◽  
Catalytic Cracking Of Cumene

Sulphur reduction in fluid catalytic cracking using a kaolin in situ crystallization catalyst modified with vanadium

Clay Minerals ◽  
2009 ◽  
Vol 44 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Ya-Li Dai ◽  
Shu-Qin Zheng ◽  
Dong Qian
Keyword(s):  
Catalytic Cracking ◽  
Comprehensive Evaluation ◽  
Catalyst Activity ◽  
Reduction Rate ◽  
Liquid Product ◽  
Fluid Catalytic Cracking ◽  
Lewis Acidity ◽  
Sulphur Reduction ◽  
In Situ Crystallization

AbstractSulphur reduction catalysts represent a viable option for S reduction in the fluid catalytic cracking (FCC) process. In this paper, a kaolin in situ crystallization catalyst was modified with vanadium and evaluated in a fixed fluid bed (FFB) reactor. The relation between the acidity of the catalyst, the S reduction rate and the catalyst activity is discussed. The results show that increasing weak Lewis acid acidity favours S reduction in the FCC process. Increasing the V content enhances the weak Lewis acidity, so causing the S reduction rate to increase. The kaolin in situ crystallization catalyst modified with 0.6 wt.% of V leads to a 34.5% reduction in the S content of the liquid product. Comprehensive evaluation of the FFB results and the S reduction ability indicates that the catalyst modified with 0.45 wt.% V provided the best performance.

scholarly journals OPTIMATION OF TIME AND CATALYST/FEED RATIO IN CATALYTIC CRACKING OF WASTE PLASTICS FRACTION TO GASOLINE FRACTION USING Cr/NATURAL ZEOLITE CATALYST

2010 ◽  
Vol 2 (1) ◽  
pp. 30-40 ◽  
Author(s):  
Wega Trisunaryanti
Keyword(s):  
Catalytic Cracking ◽  
Natural Zeolite ◽  
Zeolite Catalyst ◽  
Catalyst Activity ◽  
Gasoline Fraction ◽  
Feed Ratio ◽  
Waste Plastics ◽  
Nitrogen Gas ◽  
Activity Test ◽  
Vis Spectroscopy

Optimation of time and catalyst/feed ratio in catalytic cracking of waste plastics fraction to gasoline fraction using Cr/Natural Zeolite catalyst has been studied.The natural zeolite was calcined by using nitrogen gas at 500 oC for 5 hours. The chromium supported on to the zeolite was prepared by ion exchange methode with Cr(NO3)3.9H2O solution with chromium/zeolite concentration of 1% (w/w). The zeolite samples were then calcined  with nitrogen gas at 500 oC for 2 hours, oxidyzed with oxygen gas and reduced with hydrogen at 400 oC for 2 hours. The characterization of the zeolite catalyst by means of Si/Al ratio by UV-Vis spectroscopy, acidity with pyridine vapour adsorption and Na, Ca and Cr contents by atomic adsorption spectroscopy (AAS). The catalyst activity test was carried out in the cracking process of waste plastics fraction with boiling point range of 150 - 250 °C (consisted of C12 - C16 hydrocarbons) at 450 oC for 30 min, 60 min and 90 min, and catalyst/feed ratio 1/1, 1/2, 1/3, ¼ (w/w). The result of catalyst activity test  showed  that  the maximum number  conversion of gasoline fraction (C5-C11) is 53,27% with relatively low coke formation using 1/3 catalyst/feed ratio and the cracking time of 60 min.. This  catalyst has  Si/Al ratio = 1,21 (w/w) , acidity = 0,16 mmol/g and Na content = 0,81%, Ca content = 0,15% and Cr content 0,24%.   Keywords: zeolite, catalytic cracking, gasoline, chromium.

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