Effect of Heating Rate on the Pyrolysis of Oil Shale

1976 ◽  
pp. 492-503 ◽  
Author(s):  
CHARLES ARNOLD
Keyword(s):  
Heating Rate ◽  
Oil Shale

Effect of Heating Rate on Pyrolysis Kinetics of Göynük Oil Shale

2002 ◽  
Vol 24 (10) ◽  
pp. 931-936 ◽  
Author(s):  
Levent Değirmenci ◽  
Tülay Durusoy
Keyword(s):  
Heating Rate ◽  
Oil Shale ◽  
Pyrolysis Kinetics ◽  
Kinetics Of

The Fushun Oil Shale Semi-Coke’s Combustion Features and Thermal Dynamic Analysis

2014 ◽  
Vol 694 ◽  
pp. 327-331
Author(s):  
Yan Chang Li ◽  
Yu Meng Yang
Keyword(s):  
Activation Energy ◽  
High Temperature ◽  
Low Temperature ◽  
Heating Rate ◽  
Oil Shale ◽  
Reaction Order ◽  
Ignition Point ◽  
Reaction Orders ◽  
Combustion Features ◽  
High Temperature Condition

This study analyses the Fushun oil shale semi-coke samples prepared in 450°C, 550°C and 650°C by using STA449 TGA. The experiment studied their ignition points, concluded that with the ascent of the char-making-temperature the semi-coke’s ignition point is getting higher. The test used Coats-Redfern way to study the semi-coke’s activation energy. The result shows the semi-coke’s thermal dynamic model needs two different reaction orders in different temperature. In low temperature the reaction order is n=1; in high temperature it is n=3. When the temperature is low (n=1), the activation energy doesn’t influenced by the heating rate. In high temperature condition the activation energy is getting bigger with the ascent of the heating rate.

Heating rate effect on fractional yield and composition of oil retorted from El-lajjun oil shale

2010 ◽  
Vol 89 (2) ◽  
pp. 239-243 ◽  
Author(s):  
Adnan Al-Harahsheh ◽  
Omar Al-Ayed ◽  
Moh’d Al-Harahsheh ◽  
Rajab Abu-El-Halawah
Keyword(s):  
Heating Rate ◽  
Oil Shale ◽  
Rate Effect

A TGA-MS INVESTIGATION OF THE EFFECT OF HEATING RATE AND MINERAL MATRIX ON THE PYROLYSIS OF KEROGEN IN OIL SHALE

Oil Shale ◽  
2016 ◽  
Vol 33 (2) ◽  
pp. 125 ◽  
Author(s):  
Y HUANG ◽  
C FAN ◽  
X HAN ◽  
X JIANG
Keyword(s):  
Heating Rate ◽  
Oil Shale ◽  
Mineral Matrix

scholarly journals Pyrolysis characteristics analysis of Chang-7 oil shale using thermal analysis and pyrolysis-gas chromatograph-mass spectrometry

2017 ◽  
Vol 36 (5) ◽  
pp. 1006-1021 ◽  
Author(s):  
Yu Ma ◽  
Shixin Zhou ◽  
Jing Li ◽  
Yuanju Li ◽  
Kefei Chen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Heating Rate ◽  
Oil Shale ◽  
Decomposition Temperature ◽  
Activation Energies ◽  
Gas Chromatograph ◽  
Pyrolysis Gas ◽  
Exponential Factor ◽  
Shale Sample ◽  
Gas Chromatograph Mass Spectrometry

There are vast resources of oil shale in the Chang-7 section of the Upper Triasic Yanchang Formation, Ordos Basin, China. They would provide secure access to transportation fuels, if utilized in an effective, economic and environmental manner. A Chang-7 oil shale sample containing pyrite has been pyrolysed in a thermogravimetric analyzer at constant heating rates of 5, 10, 20℃/min up to 1150℃ with nitrogen as purge gas. Meanwhile, the pyrolysis-gas chromatograph-mass spectrometry experiments were performed on parallel samples of Chang-7 oil shale sample at 20℃/min in the four temperature sections, ranging from 100 to 700℃ to understand the decomposition mechanism. The initial decomposition temperature and the final decomposition temperature of hydrocarbonaceous material were about 367℃ and 521℃ (average values), respectively, which raised with the increase of heating rate. The decomposition of pyrite began to take place over 500℃, and the pyrolysates involving sulfur compounds are harmful to the environment and corrode the equipment. Thus, we recommended that the final temperature of Chang-7 oil shale pyrolysis was best not to exceed 550℃ considering the heating rate to avoid environmental pollution and damage of the instruments. Chang-7 oil shale exhibited a single stage decomposition in the range of about 367–521℃, representing the rearrangement of kerogen molecules in the temperature range of 100–350℃. The activation energies of kerogen decomposition were calculated using Coats–Redfern method at different heating rate. We found that both activation energy and pre-exponential factor increased with an increasing heating rate. Finally, the DTA curves of Chang-7 oil shale verified the reliability of the calculated activation energies.

Influence of heating rate on the pyrolysis of oil shale

1983 ◽  
Vol 8 (1) ◽  
pp. 19-31 ◽  
Author(s):  
Gunnar Linder ◽  
Lars A. Andersson ◽  
Ingemar Bjerle
Keyword(s):  
Heating Rate ◽  
Oil Shale

Contrastive Analysis on Low Temperature Carbonization of Longkou and Yaojie Oil Shale in Aluminum Retort

2013 ◽  
Vol 860-863 ◽  
pp. 960-966
Author(s):  
Yao Xiong ◽  
Ming Jie Ma ◽  
Guan Yu Wang ◽  
Shan Xiu Huang ◽  
Guang Yi Cai ◽  
...  
Keyword(s):  
Particle Size ◽  
Heating Rate ◽  
Residence Time ◽  
Oil Shale ◽  
Influence Factor ◽  
Volatile Component ◽  
Proximate Analysis ◽  
Oil Yield ◽  
Shale Oil ◽  
Experimental Findings

Lots of basic analyses carried on YJOS (Yaojie oil shale) and LKOS (Longkou oil shale) consist of proximate analysis, ultimate analysis, XRF analysis and shale oil yield in aluminum retort. Besides, TGA are used on YJOS, LKOS and shale oil, gas chromatographic analysis is used on retorting gas. The results show that LKOS and YJOS have the same hydrogen-to-carbon ratio, but LKOS has higher volatile component and its oil yield in aluminum retort is much higher than YJOS. Ca content in LKOS is much higher than YJOS, however, Al and Fe content in LKOS are lower than YJOS. Two kinds of shale oil after destructive distillation have similar composition and relative content, in addition, they all produce more low boiling point distillates, combustible component of their destructive distillation gas are H2 and CH4, the second are CO and C2H6. Aluminium retort experimental findings, The carbonization temperature is the main influence factor on oil shale destructive distillation process in aluminum retort. Residence time has small influence on shale oil yield but need to choose appropriate heating rate and particle size. Best carbonization parameters of LKOS in aluminum retort: Temperature 500~550°C, heating rate 5°C/min, particle size 2~4mm, Residence time 10~20min;the best parameters of YJOS: Temperature 500~550°C, heating rate 5°C/min, particle size0.2~0.9mm, residence time 10~20min.

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