The influence of radical-forming additives on the product composition of the initiated cracking of Bayan-Erkhet field bitumen

Keyword(s):  
1989 ◽  
Vol 54 (8) ◽  
pp. 2054-2063 ◽  
Author(s):  
Jiří Čejka ◽  
Ludmila Kubelková ◽  
Pavel Jírů

Acetone transformation catalyzed by HZSM-5 and NaZSM-5 zeolites and by zeolites modified with basic oxides was studied in an integral reactor at a temperature of 350 °C. Modification of acido-basic properties of ZSM-5 zeolites resulted both in the total conversion changes and in the essential changes in the product composition. Isobutene was found to be the main product over HZSM-5 zeolites exhibiting low activity, while aromatics prevailed when high conversion level was attained. Classical condensation of acetone yielding mesityloxide and phorones was observed over NaZSM-5 zeolites impregnated with CaO and ZnO.


Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 367
Author(s):  
Martyna Murat ◽  
Zahra Gholami ◽  
Josef Šimek ◽  
Daily Rodríguez-Padrón ◽  
José Miguel Hidalgo-Herrador

A great emphasis is placed on searching for efficient sources to produce renewable fuels due to the actual trends in avoiding the use of fossil resources to mitigate the environment’s deterioration. Thus, the use of waste from the food or wood industry for the production of biofuels is widely researched and may contribute to sustainable general development. Rendered fat and Fischer-Tropsch waxes are high-energy materials which could be used for the pyrolysis reaction. Therefore, in this study, the effect of reaction parameters and feedstock composition on the distribution of the pyrolysis products has been examined. The experiments were carried out in a nitrogen atmosphere in a multi-shot pyrolizer instrument equipped with GC-FID. First, the influence of the temperature was examined at 785, 800, and 815 °C. The highest yield to olefins was observed at 815 °C. The effect of triglycerides and paraffins contents (0–100% with 10% ramp) in the feedstock on the product composition was investigated at 815 °C. The gas chromatography analyses revealed that the feedstock composition did not significantly affect the product composition due to the high temperature and the long linear chain structure similarities between the free fatty acids and Fischer-Tropsch waxes.


2007 ◽  
Vol 41 (6) ◽  
pp. 323-330
Author(s):  
O. N. Fedyaeva ◽  
A. A. Vostrikov ◽  
D. Yu. Dubov ◽  
S. A. Psarov ◽  
M. Ya. Sokol

2015 ◽  
Vol 1103 ◽  
pp. 37-43 ◽  
Author(s):  
E.I. Denisova ◽  
Irina A. Ustyuzhaninova ◽  
Vadim V. Kartashov ◽  
Vladimir A. Volkovich ◽  
Ivan V. Chernetskiy ◽  
...  

Formation of ZrO2-5 wt.% Y2O3 nanostructured powders in glycine-nitrate combustion synthesis was investigated and the effect of "glycine-to-NO3-" ratio and heating method on the reaction product composition and particle morphology studied. Urea and ammonium nitrate additives were used to optimize the regime of the process. The effect of these reagents on gas generation required for the dispersion of particles, and on the process temperature was investigated.


2008 ◽  
Vol 25 (1) ◽  
pp. 99-105 ◽  
Author(s):  
Wenzhong Shen ◽  
Qingjie Guo ◽  
Hui Wang ◽  
Xiangping Yang ◽  
Yihong Liu ◽  
...  

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