Transformation mechanisms of organic S/N/O compounds during microwave pyrolysis of oil shale: A comparative research with conventional pyrolysis

2021 ◽  
Vol 212 ◽  
pp. 106605
Author(s):  
Lu He ◽  
Yue Ma ◽  
Changtao Yue ◽  
Jianxun Wu ◽  
Shuyuan Li ◽  
...  
Keyword(s):  
Comparative Research ◽  
Oil Shale ◽  
Microwave Pyrolysis ◽  
Organic S ◽  
Transformation Mechanisms ◽  
Conventional Pyrolysis

Analysis of Products by Conventional and Microwave Induced Pyrolysis for Low Rank Coal

2012 ◽  
Vol 524-527 ◽  
pp. 871-875
Author(s):  
Yong Hui Song ◽  
Jun Wei Shi ◽  
Jian Ping Fu ◽  
Xin Zhe Lan ◽  
Qiu Li Zhang ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Microwave Power ◽  
Microwave Treatment ◽  
Light Fraction ◽  
Low Rank ◽  
Low Rank Coal ◽  
Microwave Pyrolysis ◽  
Microwave Assisted ◽  
Component Content ◽  
Conventional Pyrolysis

This paper describes the products characteristic derived from the conventional pyrolysis (CP) and microwave-assisted pyrolysis (MWP) of low metamorphic coal. GC/MS were used to analyze the volatile fractions of tar obtained by pyrolysis at different temperature and microwave power. It was found that microwave treatment produces more gas and oil than conventional pyrolysis at 800w and 800°C. In addition, the gas from the microwave has much higher syngas (H2+ CO) contents (up to 55 vol. %) than those obtained by conventional hydrolysis (up to 42 vol. %). The tar from the microwave is mainly composed of aromatic pyrolysis and phenolic compounds, and the content is 47.398% and 13.831% respectively as the microwave power is 800w. Meanwhile, the tar component content of C5-C10from microwave pyrolysis is up to 5 fold than conventional pyrolysis. By contrast, the microwave-assisted pyrolysis is beneficial to the tar conversion to light fraction.

A Research on Microwave and Conventional Pyrolysis for Low Rank Coal

2014 ◽  
Vol 1044-1045 ◽  
pp. 209-214
Author(s):  
Yong Hui Song ◽  
Xin Li ◽  
Jun Wei Shi ◽  
Xin Zhe Lan
Keyword(s):  
Aromatic Hydrocarbon ◽  
Phenolic Compound ◽  
Gas Analysis ◽  
Low Rank ◽  
Western China ◽  
Low Rank Coal ◽  
Pyrolysis Products ◽  
Microwave Pyrolysis ◽  
Pyrolysis Tar ◽  
Conventional Pyrolysis

In this paper, conventional pyrolysis (CP) and microwave pyrolysis (MWP) for three types of low rank coal in western China was studied. The effects of pyrolysis methods and temperature etc on product yields were also discussed. Pyrolysis products were characterized by IR, Gas analysis meter and GC-MS. Results showed that the tar and gas yields in microwave pyrolysis is about 3%-5% higher than those in the conventional pyrolysis. H2 and CO proportions in gas are above 55%. The contents of benzene, aromatic hydrocarbon and phenolic compound in microwave pyrolysis tar are higher than those in the conventional pyrolysis, in addition, C5~C10 substance content in tar is about 5 times as that in the conventional, so the microwave pyrolysis can prompt tar converting to light fraction.

The heating performance and kinetic behaviour of oil shale during microwave pyrolysis

Energy ◽  
2021 ◽  
pp. 123021
Author(s):  
Lu He ◽  
Yue Ma ◽  
Changtao Yue ◽  
Shuyuan Li ◽  
Xun Tang
Keyword(s):  
Oil Shale ◽  
Microwave Pyrolysis ◽  
Kinetic Behaviour ◽  
Heating Performance

Microwave Pyrolysis of Emulsified Ceramic Precursor Ocompounds

1994 ◽  
Vol 347 ◽  
Author(s):  
M. Willert-Porada ◽  
S. Dennhöfer ◽  
D. Hachmeister
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Calcination Temperature ◽  
Processing Route ◽  
Nanosized Powders ◽  
Pyrolysis Products ◽  
Microwave Pyrolysis ◽  
Grain Sizes ◽  
Conventional Pyrolysis ◽  
Metalorganic Compounds

ABSTRACTApplication of paraffin as a MW-transparent matrix for microwave pyrolysis of metalorganic compounds enables synthesis of large quantities of nanosized powders with excellent storability and packing behavior. Fully crystalline, nanosized t-ZrO2 powders with specific surface area > 200 m 2 g -1 are obtained from Zr-alcoholate, and alumina powders with > 500 m2g-1 from Al-alcoholates. Some differences exist between microwave pyrolysis and conventional pyrolysis of such mixtures. Powders from microwave pyrolysis transform at lower calcination temperature to α-A12O3 and exhibit after calcination a more homogeneous morphology as compared to powders from conventional pyrolysis. Furthermore, a different composition of the volatile pyrolysis products is found. t-ZrO2 powder from the microwave processing route exhibits an increased stability towards transformation to monoclinic ZrO2 as well as smaller initial grain sizes than a conventionally synthesized powder.

Preparation and characterization of sorbents from food waste

2017 ◽  
Vol 6 (3) ◽  
Author(s):  
Barbora Grycova ◽  
Adrian Pryszcz ◽  
Pavel Lestinsky ◽  
Katerina Chamradova
Keyword(s):  
Mass Balance ◽  
Surface Area ◽  
Food Waste ◽  
Chromatographic Analysis ◽  
Potassium Hydroxide ◽  
Laboratory Apparatus ◽  
Microwave Pyrolysis ◽  
Conventional Pyrolysis ◽  
Bet Theory

AbstractWaste coffee was treated by pyrolysis in the conventional laboratory apparatus at 800°C. Afterwards, a mass balance of the final yields, gas chromatographic analysis and assessment of solid and liquid residues were done. The selected waste material was also subjected to microwave pyrolysis in terms of adsorbents preparation. The solid residues were further activated with potassium hydroxide. Final characterization of prepared sorbents was made by sorption of nitrogen at 77 K. Activated sorbents had much better sorption properties. The surface area according to Brunauer-Emmett-Teller (BET) theory of activated material (from conventional pyrolysis) was measured 1794 m

VARIATION OF THE PORE STRUCTURE DURING MICROWAVE PYROLYSIS OF OIL SHALE

Oil Shale ◽  
2010 ◽  
Vol 27 (2) ◽  
pp. 135 ◽  
Author(s):  
W QING ◽  
J GUOJUN ◽  
L HONGPENG ◽  
B JINGRU ◽  
L SHAOHUA
Keyword(s):  
Pore Structure ◽  
Oil Shale ◽  
Microwave Pyrolysis
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