scholarly journals The effect of convection gas on coal pyrolysis characteristics

2017 ◽  
Author(s):  
Xiaonan Zhao ◽  
Qihai Guo ◽  
Li Ding ◽  
Daohong Wu
Keyword(s):  
Coal Pyrolysis ◽  
Pyrolysis Characteristics

Effects of Zn on Pyrolysis Characteristics of Shenhua Lignite

2014 ◽  
Vol 1008-1009 ◽  
pp. 247-251
Author(s):  
Wipawan Sangsanga ◽  
Chuan Na ◽  
Jin Xiao Dou ◽  
Jiang Long Yu
Keyword(s):  
Pyrolysis Temperature ◽  
Fixed Bed ◽  
Coal Pyrolysis ◽  
Pyrolysis Gas ◽  
Gaseous Products ◽  
Pyrolysis Characteristics ◽  
Maximum Value ◽  
Product Gas ◽  
Zn Content ◽  
Catalytic Effects

The catalytic effects of Zn on the release of the gaseous products during pyrolysis of Shenhua lignite was investigated by using a fixed-bed quartz reactor. The product gas compositions from the coal pyrolysis were analyzed by a gas chromatography (GC). Experimental results show that Zn had noticeable catalytic effects on lignite pyrolysis. With the increase in Zn content, lignite weight loss increases during pyrolysis. However, there was an optimum content for amount Zn into the coal. Pyrolysis temperature had a great impact on the composition of pyrolysis gas. As the pyrolysis temperature increased, char yield decreased and gas yield increased. There existed a temperature that tar yield reached its maximum value.

Pyrolysis Characteristics and Kinetics of Low Rank Coal

2011 ◽  
Vol 695 ◽  
pp. 493-496 ◽  
Author(s):  
Yong Hui Song ◽  
Jian Mei She ◽  
Xin Zhe Lan ◽  
Jun Zhou
Keyword(s):  
Weight Loss ◽  
Heating Rate ◽  
Frequency Factor ◽  
Low Rank ◽  
Coal Pyrolysis ◽  
Pyrolysis Characteristics ◽  
Second Stage ◽  
Thermo Gravimetric Analyzer ◽  
Kinetics Of ◽  
Pyrolysis Kinetic

The pyrolysis characteristics of Jianfanggou(JFG) coal was studied using a thermo-gravimetric analyzer and the pyrolysis kinetic parameters were calculated at the different heating rate. The results showed the DTG curves under different heating rate had three peaks and the corresponding temperature were 100°C, 470°C and 750°C, the pyrolysis process can be divided into three stages conclusively. The maximum weight loss rate at 470°C indicated the major weight loss occurred in the second stage. The Tb, Tf and T∞ obtained under experiment situation. The results of the JFG coal pyrolysis kinetic showed the Tb, Tf and T∞ increased gradually with the accretion of the heating rate. In the meantime, the variation of frequency factor was consistent with the trend of activation energy.

Co-Pyrolysis Charateristics Study of Dianchi Lake Sludge and Coal

2013 ◽  
Vol 860-863 ◽  
pp. 518-521
Author(s):  
Jia Qun Xia ◽  
Hu Ping Li
Keyword(s):  
Dianchi Lake ◽  
Coal Pyrolysis ◽  
Pyrolysis Process ◽  
Pyrolysis Characteristics ◽  
Solid Phases ◽  
Tg And Dtg ◽  
Lake Sludge

To find out the Co-pyrolysis characteristics of Dianchi Lake sludge and coal,Dianchi Lake sludge was introduced into coal pyrolysis process. In this paper,the pyrolysis experiments of Dianchi Lake sludge and coal were carried out by TG and TGA. Results show that the TG and DTG profiles of Dianchi Lake sludge were similar to coal, but different from coal under various blending ratios.Interaction was observed between the solid phases of Dianchi Lake sludge. The results provide a reference for further study on co-pyrolysis of Dianchi Lake sludge and coal to a certain extent.

scholarly journals Kinetic Analysis of Low-Rank Coal Pyrolysis by Model-Free and Model-Fitting Methods

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Qiuli Zhang ◽  
Min Luo ◽  
Long Yan ◽  
Aiwu Yang ◽  
Xiangrong Hui
Keyword(s):  
Model Fitting ◽  
Decomposition Reaction ◽  
Low Rank ◽  
Coal Pyrolysis ◽  
Pyrolysis Kinetics ◽  
Heating Rates ◽  
Pyrolysis Characteristics ◽  
Model Free ◽  
Thermal Analyzer ◽  
Thermogravimetric Data

Coal SJC, coal WJG, coal ZJM, and coal HCG were selected to investigate the pyrolysis kinetics of northern Shaanxi coals. TG and DSC experiments of four coals were carried out with a synchronous thermal analyzer at heating rates 5, 10, 15, and 20 C/min, respectively. The pyrolysis characteristics were described by thermogravimetric data, and the kinetic parameters were calculated by Flynn–Wall–Ozawa (FWO), Kissinger, general integration, and MacCallum–Tanner methods. The results show that coal SJC, coal ZJM, and coal HCG all conform to the reaction series equation, the thermal decomposition reaction rate is controlled by chemical reaction, and coal WJG conforms to Avrami–Erofeev equation. The activation energies of the four coals are 177.53 kJ/mol, 200.34 kJ/mol, 158.59 kJ/mol, and 240.47 kJ/mol, respectively.

Coal pyrolysis characteristics by TG–MS and its late gas generation potential

Fuel ◽  
2015 ◽  
Vol 156 ◽  
pp. 243-253 ◽  
Author(s):  
Min Wang ◽  
Zhongsheng Li ◽  
Wenbiao Huang ◽  
Jinxiu Yang ◽  
Haitao Xue
Keyword(s):  
Coal Pyrolysis ◽  
Gas Generation ◽  
Pyrolysis Characteristics

Research Progress in Pyrolysis of Low-Rank Coals under Different Conditions

2014 ◽  
Vol 953-954 ◽  
pp. 1131-1134
Author(s):  
Shang Hui Ding ◽  
Mei Yu Gu ◽  
Ying Dong Jia ◽  
Teng Fei Chang ◽  
Ge Wang ◽  
...  
Keyword(s):  
Development Strategy ◽  
Fossil Fuels ◽  
Review Paper ◽  
Low Rank ◽  
Research Progress ◽  
Coal Pyrolysis ◽  
Pyrolysis Characteristics ◽  
Production Ratio ◽  
Advanced Technologies ◽  
Low Rank Coals

Coal is absolute dominance in reserves-to-production ratio terms. The development of fuels derived from pyrolysis of low-rank coals is beneficial to lower fossil fuels cost and greenhouse gas emissions. The research proposal briefly summarized energy situation and sustainable development strategy as they were by 2013 at first. Then some recent process in the understanding of the pyrolysis behaviors of coal was reviewed. The influencing factors of atmospheres, additives, and catalysts during coal pyrolysis will be followed to literature. The review paper on pyrolysis characteristics will achieve the development of advanced technologies for the clean and efficient utilization of low-rank coals

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