Article
Engineering, Chemical
Jorge Lopez-Beceiro, Ana Maria Diaz-Diaz, Ana alvarez-Garcia, Javier Tarrio-Saavedra, Salvador Naya, Ramon Artiaga
Summary: A kinetic model was proposed to fit isothermal thermogravimetric data of cellulose at different temperatures in an inert atmosphere. The method involves fitting single time-derivative thermogravimetric curves and rate parameter values obtained at different temperatures separately, demonstrating its flexibility and effectiveness in fitting studies.
Article
Thermodynamics
Qing He, Chen Cheng, Xinsha Zhang, Qinghua Guo, Lu Ding, Abdul Raheem, Guangsuo Yu
Summary: In this study, the pyrolysis process of low-ash coal and high-ash coal was investigated, revealing the pyrolysis mechanism of coal, non-isothermal kinetics, and the interaction between minerals and organics. The findings showed that coal pyrolysis occurs in two steps, and high-temperature inner minerals can promote graphitization. After demineralization, the distribution of pyrolysis activation energy becomes more concentrated.
Article
Chemistry, Analytical
Guozhan Jiang, Rachel Fenwick, Jonathan Seville, Hameed B. Mahood, Rex B. Thorpe, Suchismita Bhattacharya, D. A. Sanchez Monsalve, Gary A. Leeke
Summary: The measurement of kinetic parameters in the pyrolysis of polyolefins requires the use of a lumped kinetic model. A non-isothermal method was established to predict the product distribution, and the measured parameters were validated using isothermal experimental data. The non-isothermal method proves to be a faster approach for measuring intrinsic rate constants at high temperatures.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Analytical
Hoon Chae Park, Dong Won Yun, Myung Kyu Choi, Hang Seok Choi
Summary: In this study, a spouted-bed thermogravimetric analyzer (SB-TGA) was developed to accurately investigate the reaction models and kinetic parameters of spouted beds. The analyzer overcomes the disadvantages of conventional thermogravimetric analyzers that arise from different hydrodynamics. The experimental results demonstrate that the SB-TGA provides more reliable results for predicting the pyrolysis reaction in a spouted-bed.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Energy & Fuels
Gamzenur Ozsin, Esin Apaydin-Varol, Murat Kilic, Ayse E. Putun, Ersan Putun
Summary: Pyrolysis of petroleum sludge is a promising method for energy production from solid waste, requiring prediction of thermal decomposition behavior for modeling. This study focused on developing a systematic methodology to calculate kinetics and thermodynamics of oil sludge pyrolysis. The findings on evolved gases and kinetic and thermodynamic parameters can enhance the utilization of this residue in refinery applications.
Article
Thermodynamics
Jiafeng Jin, Jinsheng Sun, Kaihe Lv, Qilin Hou, Xuan Guo, Kesong Liu, Yan Deng, Lide Song
Summary: This study synthesized a novel Cu@4 A zeolite nano-catalyst, which exhibited excellent catalytic pyrolysis performance on oil shale. The catalytic pyrolysis behaviors were investigated and the results showed a decrease in the initial pyrolysis temperature and activation energy after catalytic treatment. The yields of oil, gas, H2, and ethylene increased, and Cu@4 A showed selectivity on light alkanes and alkenes. The configurations of hydrocarbons in nano-pore were investigated by Molecular Dynamics simulations and the catalytic mechanism was elucidated.
Article
Engineering, Environmental
Chengyu Li, Jun Zhang, Jing Gu, Haoran Yuan, Yong Chen
Summary: The research demonstrated that adjusting the acid-base value of metal oxides significantly affected the transformation pathway of cellulose pyrolysis, with higher acidity-to-basicity ratios accelerating deoxygenation and lower ratios promoting ketonization and aldol condensation. The acid-base sites played a promotional role in cellulose pyrolysis, while metal oxides with better porous structures contributed to the production of aromatics and aliphatic hydrocarbons.
Article
Green & Sustainable Science & Technology
V. Karuppasamy Vikraman, G. Boopathi, D. Praveen Kumar, R. Mythili, P. Subramanian
Summary: The study focused on the thermal degradation pattern and pyrolytic kinetics of milk dust powder (MDP), revealing its potential suitability as a candidate for energy conversion through pyrolysis.
Article
Chemistry, Physical
Ibrahim Dubdub
Summary: This paper aims to investigate the kinetics of polypropylene (PP) polymer pyrolysis using thermogravimetric analysis (TGA). The results show that the activation energy values for PP polymer pyrolysis at different conversions are in good agreement with the values obtained from four model-free methods. Additionally, the most controlling reaction mechanism identified using Criado's method is the geometrical contraction models-cylinder model.
Article
Agricultural Engineering
Sonalben B. Prajapati, Alok Gautam, Shina Gautam
Summary: In this study, the pyrolysis of Printed circuit boards (PCBs), Cotton Stalk (CS), and their different compositions were analyzed using thermogravimetric analysis. The results showed that co-pyrolysis can reduce the production of phenolic compounds and bromides.
BIOMASS & BIOENERGY
(2023)
Article
Chemistry, Physical
Ziwei Chen, Linhao Liu, Hao Wang, Lili Liu, Xidong Wang
Summary: This study found that the waste integrated circuits undergo three different decomposition stages during pyrolysis, and the pyrolysis temperature and gas atmosphere play a crucial role in the reaction. The determination of non-isothermal kinetic parameters indicates that the actual average activation energy of ICs should be between 170 and 200 kJ/mol.
Article
Engineering, Environmental
Shuyu Zhou, Yuan Xue, Junmeng Cai, Cunhao Cui, Ziang Ni, Zhongyue Zhou
Summary: The study compares the effects of acid infusion and washing pretreatments on biomass pyrolysis products through a combination of experimental techniques and theoretical kinetic analysis. Acid washed corn stover showed reduction in char and improvement in sugars, especially levoglucosan, compared to raw corn stover, while sugar yield of acid infused corn stover remained relatively high under acid buffer conditions but decreased significantly with higher acid infusion levels. The kinetic analysis suggested strong condensation reactions between cellulose and lignin in acid infused corn stover, with increased production of vinyl-phenols and other simple phenols associated with enhanced char production. Overall, the study provides insights into fast pyrolysis behavior of acid pretreated biomass for high-quality bio-oil production and value-added chemicals.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Fangjun Chen, Fengxia Zhang, Shiliang Yang, Huili Liu, Hua Wang, Jianhang Hu
Summary: This study evaluated the pyrolysis kinetics of waste industrial hemp stem (IHS) to achieve high-value utilization of agricultural waste. Experimental and model analysis were used to determine the apparent activation energy, pre-exponential factor, and reaction mechanism of IHS. The results indicated that IHS is a suitable feedstock for renewable energy production.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Maria Anna Charitopoulou, Konstantinos G. Kalogiannis, Angelos A. Lappas, Dimitrios S. Achilias
Summary: This paper reviews the existing techniques for recycling plastics from waste electronic and electronic equipment, with a particular focus on catalytic pyrolysis as an environmentally friendly method for producing value-added materials. It also discusses the challenges and trends in recycling plastics containing brominated flame retardants, emphasizing the necessity of pretreatment for debromination. The study highlights the potential of co-pyrolysis and catalytic pyrolysis, along with an emerging technique, microwave-assisted pyrolysis, in enhancing the removal of harmful compounds and producing valuable materials.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Thermodynamics
Muhammad Ashraf, Zaheer Aslam, Naveed Ramzan, Adeel Anwar, Umair Aslam, Abdullah Khan Durrani, Rafi Ullah Khan, Saad Naseer, Muhammad Zeeshan Azam
Summary: This study explores and compares the pyrolytic conversion of cow and buffalo manure through detailed kinetic and thermodynamic analysis, providing insights into the similarities in their thermal kinetics.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)