Modelling pyrolysis process for PP and HDPE inside thermogravimetric analyzer coupled with differential scanning calorimeter

2021 ◽  
Vol 176 ◽  
pp. 121468
Author(s):  
Shawki Mazloum ◽  
Youssef Aboumsallem ◽  
Sary Awad ◽  
Nadine Allam ◽  
Khaled Loubar
Keyword(s):  
Differential Scanning Calorimeter ◽  
Pyrolysis Process ◽  
Thermogravimetric Analyzer

scholarly journals Pyrolysis and Kinetic Analysis of CO2 Fixation Marine (Isochrysis sp.) and Freshwater (Monoraphidium c.) Microalgae

2021 ◽  
Author(s):  
Noridah B. Osman ◽  
Umi Syahirah Binti Mohd Amina ◽  
David Onoja Patrick ◽  
Nurul Asyikin Binti Bad ir Noon Zamana ◽  
Syazmi Zul Arif n Hakimi Saado ◽  
...  
Keyword(s):  
Co2 Fixation ◽  
Fixed Bed ◽  
Product Yield ◽  
Marine Species ◽  
Pyrolysis Process ◽  
Heating Rates ◽  
Nitrogen Flow Rate ◽  
Freshwater Microalgae ◽  
Thermogravimetric Analyzer ◽  
Bio Oil

Abstract Marine and freshwater microalgae grow in two different ecosystems, which influence their properties thus requires attention prior to determining its application. This paper has successfully disclosed the thermal, chemical, and physical properties of two types of microalgae on carbon dioxide (CO2) fixation and underwent pyrolysis process. Slow pyrolysis process for marine and freshwater microalgae (Isochrysis sp. and Monoraphidium c.) was performed in the fixed bed pyrolysis reactor and TGA (thermogravimetric analyzer) to determine the product yield and study their thermal decomposition profile. The pyrolysis was completed at various temperatures (400, 450, 500, and 550°C) at a heating rate of 15 °Cmin-1 and nitrogen flow rate of 200 ml min-1. Pyrolysis in TGA analyzer ran from 27 to 800°C at three heating rates (10, 20, and 40 °Cmin-1). For chemical composition, Fourier-transform Infrared (FTIR) analysis was performed on both microalgae samples. The highest yield (up to 33.9%) of bio-oil was obtained from Isochrysis sp. for all temperatures while the highest average yield (65.78%) of bio-char was collected from Monoraphidium c. species. From TGA pyrolysis, the major decomposition occurred between 200-400°C for Monoraphidium c. species. On the other hand, the decomposition profile of Isochrysis sp. was slightly slower, which may be due to the differences in lipid composition (FTIR peak 2929 cm-1). The activation energy of all tests is lower (33.6-40.3 kJ mol-1) compared to several other biomasses. Marine species fixed with CO2 showed promising results even without addition of catalyst and no additional cost needed.

Optimization Study of Pyrolysis Process for Bamboo Waste by Orthogonal Experiment

2013 ◽  
Vol 634-638 ◽  
pp. 792-797
Author(s):  
Li Yang ◽  
Yong Gang Wei ◽  
Hua Wang ◽  
Jian Hang Hu
Keyword(s):  
Heating Rate ◽  
Orthogonal Experiment ◽  
Orthogonal Design ◽  
Carbonization Temperature ◽  
Operating Conditions ◽  
Pyrolysis Process ◽  
Thermogravimetric Analyzer ◽  
Optimization Study ◽  
Temperature Heating ◽  
Dsc Curves

The pyrolysis of bamboo waste has been investigated. The effects of carbonization temperature, heating rate and carbonization time on characters of biomass carbonization was investigated by the orthogonal design. The optimized operating condition of bamboo waste was achieved by the analysis of variance: the carbonization temperature is 400 °C, the heating rate is 10 °C /min, the carbonization time is 60min.The yield of bamboo waste under the optimized operating conditions is 31.8%, and ash is 3.9%. The thermogravimetric analysis of the bamboo waste was carried out in a thermogravimetric analyzer. The analysis of TG and DSC curves indicates that the pyrolysis of bamboo waste should be divided into four steps: the dryness is below120 °C, from 120 to 240°C is preheating section, and pyrolysis occurs at 230 to 370 °C and after 370 °C is carbonization process.

Experimental Study on the Pyrolysis Characteristics of the Poplar Wood

2014 ◽  
Vol 521 ◽  
pp. 93-96
Author(s):  
Dong Yang ◽  
Zai Qiang Lou ◽  
Xiao Jie Zhang ◽  
Meng Zhang
Keyword(s):  
Experimental Study ◽  
Thermal Hysteresis ◽  
Gravimetric Analysis ◽  
Poplar Wood ◽  
Thermal Gravimetric ◽  
Pyrolysis Process ◽  
Heating Rates ◽  
Pyrolysis Characteristics ◽  
Thermogravimetric Analyzer ◽  
Tg And Dtg

The thermal gravimetric analysis of poplar was carried out at heating rates of 20°C/min,40°C/min and 60°C/min with the thermogravimetric analyzer,model Q50.The analysis of TG and DTG curves indicates that the pyrolysis process of the poplar is divided into four stages of drying, pyrolysis preheating, pyrolysis and charring.The thermal hysteresis occurs with the heating rates increasing.

Experimental Research of Stone Coal Mixed with Biomass Pyrolysis

2014 ◽  
Vol 1044-1045 ◽  
pp. 478-481
Author(s):  
Jing Zhao ◽  
Guang Qiang Liu ◽  
Kun Liu ◽  
Shuo Zhang ◽  
Guo Wei Xie
Keyword(s):  
Experimental Research ◽  
Peak Temperature ◽  
Corn Stalk ◽  
Mixing Ratio ◽  
Coal Pyrolysis ◽  
Pyrolysis Process ◽  
Biomass Pyrolysis ◽  
Stone Coal ◽  
Thermogravimetric Analyzer

Stone coal and two kinds of biomass were respectively mixed and studied during pyrolysis by using thermogravimetric analyzer. The results showed that the main pyrolysis peak temperature of stone coal is the lowest under the mixing ratio of 3:7 during the pyrolysis process. Because of the high content of alkali, corn stalk has better promotion for the coal pyrolysis compared to sawdust.

Effects of Metal Oxides during Pyrolysis Sludge by Kinetic Analysis

2013 ◽  
Vol 864-867 ◽  
pp. 1854-1858
Author(s):  
Ren Ping Liu ◽  
Rui Yao ◽  
Bin Bin Dong
Keyword(s):  
Sewage Sludge ◽  
Calorific Value ◽  
Proximate Analysis ◽  
Probable Mechanism ◽  
Pyrolysis Process ◽  
Ozawa Method ◽  
Heating Rates ◽  
Element Analysis ◽  
Thermogravimetric Analyzer ◽  
Mechanism Function

On the basis of proximate analysis, element analysis and calorific value that carried out on the sewage sludge, thermogravimetric analyzer (TGA) was conducted on the research of sewage sludge pyrolysis. The loss of sludge under different heating rates was comparative analyzed. And we calculated the activation energy by using Ozawa method, Satava method was also used to infer the most probable mechanism function and kinetic parameters. the result shows that sludge pyrolysis process can be divided into three parts as 200-450°C,450-600°C and above 600°C, the Reaction mechanism functions for the pre main two parts were G(α)=(1-α)-1 and G(α)=[-ln(1-α)]2/3respectively. Its proved that Al2O3,MgO probably inhibited the decomposition while Fe2O3,CaO,ZnO promoted the degradation of organic matters under 200-450°C. CaO and Fe2O3 showed advantage while MgO, Al2O3, ZnO turned to be disadvantagble when temperature arised to 450-600°C. At the end of pyrolysis, the advantage effects order on pyrolysis : Al2O3> Fe2O3>MgO >ZnO>CaO.

Valorisation of by-Products/Waste of Agro-Food Industry by the Pyrolysis Process

2016 ◽  
Vol 3 (1) ◽  
pp. 1-11 ◽  
Author(s):  
D. Fino ◽  
◽  
Y.S. Camacho ◽  
S Bensaid ◽  
B. Ruggeri ◽  
...  
Keyword(s):  
Food Industry ◽  
Pyrolysis Process ◽  
By Products

Theoretical Computations on the Pyrolysis of Alkyl (dithio)acetates

2020 ◽  
Vol 17 (3) ◽  
pp. 224-233
Author(s):  
Xun Zhu ◽  
Chen Jian ◽  
Xiuqin Zhou ◽  
Abdullah M. Asiri ◽  
Khalid A. Alamry ◽  
...  
Keyword(s):  
Transition States ◽  
Membered Ring ◽  
Pyrolysis Process ◽  
Alkyl Esters ◽  
Charge Distributions ◽  
Theoretical Analyses

The pyrolysis of methyl alkyl esters I to III and dithioesters IV to VI were theoretically calculated. All possible pyrolysis paths were considered. Both esters and dithioesters presented three potential paths via six-, four- and five-membered ring transition states, respectively. The calculation processes were calculated using MP2/6-31G(d) set. In-depth theoretical analyses were also presented, including NBO related analyses, synchronicities, and charge distributions, to reveal the detailed pyrolysis process.

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