Article
Green & Sustainable Science & Technology
Yanghao Jin, Hanmin Yang, Shuo Guo, Ziyi Shi, Tong Han, Ritambhara Gond, Par G. Jonsson, Weihong Yang
Summary: Recovering carbon and H2 from plastic waste can increase its value and reduce greenhouse gas emissions. This study explores the use of a metal-free biocarbon catalyst for waste plastic pyrolysis and catalytic cracking to produce H2-rich gases and carbon. The results show that the biocarbon catalyst has a good catalytic effect and stability for various plastic wastes. Increasing the C/P ratio from 0 to 2 increases the conversion rate of C and H in plastics to carbon and H2. The hierarchical porous structure of biocarbon extends the residence time of pyrolysis volatiles and promotes cracking reactions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Energy & Fuels
K. Radhakrishnan, P. Senthil Kumar, Gayathri Rangasamy, L. Praveen Perumal, S. Sanaulla, S. Nilavendhan, V. Manivasagan, K. Saranya
Summary: Plastic production has increased globally, leading to the disposal of plastic waste in landfills or scattered, posing health and environmental risks. Converting plastic waste into fuels or other options is a more sustainable waste management approach than landfill dumping. Effective plastic waste disposal is crucial due to the long degradation time of plastic.
Article
Thermodynamics
Bijoy Kumar Mondal, Falguni Guha, Md. Nurul Abser
Summary: Waste plastics are a chronic environmental threat due to disposal issues. Without a sustainable technology for waste plastic conversion, it will spread across the planet and harm the ecosystem.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Review
Environmental Sciences
Manigandan Sekar, Vinoth Kumar Ponnusamy, Arivalagan Pugazhendhi, Sandro Nizetic, T. R. Praveenkumar
Summary: The paper reviews the new progress, challenges, and barriers on production of pyrolysis oil from plastic waste. Thermal and catalytic processes are potential methods to produce oil, with discussion on advantages and fuel characteristics. Application of pyrolysis oil on diesel engines and its impact on combustion and emission characteristics are also discussed.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Um-e-Salma Amjad, Arshia Tajjamal, Anwar Ul-Hamid, Abrar Faisal, Lubna Sherin, Amna Mir, Maria Mustafa, Nabeel Ahmad, Murid Hussain, Young-Kwon Park, Syed Ammar Hussain Zaidi
Summary: The catalytic cracking of polystyrene pyrolysis oil was investigated using Nb2O5 and NiO/Nb2O5 catalysts in a fixed bed reactor. It was found that both catalysts were able to convert dimers in the pyrolysis oil to monomers, with slightly higher activity observed for the NiO/Nb2O5 catalyst. Increasing the temperature positively affected the yield of gases during the catalytic cracking process.
Article
Chemistry, Physical
Andreas Eschenbacher, Robin John Varghese, Evangelos Delikonstantis, Oleksii Mynko, Farnoosh Goodarzi, Kasper Enemark-Rasmussen, Jogchum Oenema, Mehrdad Seifali Abbas-Abadi, Georgios D. Stefanidis, Kevin M. Van Geem
Summary: The catalytic fast pyrolysis of polyolefinic waste streams was studied to recover valuable base chemicals with high selectivity. Different properties of HZSM-5 zeolite, such as Si/Al, mesoporosity, phosphorus stabilization, and steaming, were tested and characterized. The modified HZSM-5 variants demonstrated better stability and high olefin selectivity. The direct olefin production route showed lower energy input and environmental burden compared to other waste treatment methods like pyrolytic oil steam cracking and waste incineration.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Review
Multidisciplinary Sciences
Sasa Papuga, Milica Djurdjevic, Andrea Ciccioli, Stefano Vecchio Ciprioti
Summary: The latest findings and limitations in catalytic pyrolysis for the processing of plastic waste into valuable fuels are addressed in this review. Catalytic pyrolysis provides better results compared to thermal degradation of plastics, especially in terms of the quality of the obtained liquid hydrocarbon fuel. Various types of catalysts, such as zeolites, fluid catalytic cracking, silica-alumina catalysts, and natural clays, can be used to improve the thermal degradation of plastics. Finding affordable and effective catalysts is crucial for the commercialization of catalytic pyrolysis of plastic waste. This study summarizes the most significant results and investigates the symmetry effects of molecules on the pyrolysis process.
Review
Environmental Sciences
Siu Hua Chang
Summary: Turning plastic waste into plastic oil by pyrolysis is a promising technique for addressing plastic waste pollution and promoting the circular economy of plastics. While there has been significant scientific output in this field, there is a lack of up-to-date reviews specifically focusing on plastic oil production from pyrolysis. This review aims to fill this gap by providing an overview of plastic waste as a feedstock for plastic oil production, discussing the characteristics of different types of plastic waste, the pyrolysis systems and conditions, and the challenges and prospects for large-scale production of plastic oil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Shuxiao Wang, Yuyuan Zhang, Rui Shan, Jing Gu, Taoli Huhe, Xiang Ling, Haoran Yuan, Yong Chen
Summary: With the worsening energy crisis and environmental pollution, green and renewable hydrogen energy has become a global focus. This study explores a high-yield method of hydrogen production by converting waste plastics, using a cheap and efficient nickel catalyst. The effects of reaction parameters on hydrogen production are investigated, and various forms of carbon deposition are discovered.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Multidisciplinary
Francisco Ortega, Maria Angeles Martin-Lara, Hector J. Pula, Montserrat Zamorano, Monica Calero, Gabriel Blazquez
Summary: This research aims to develop a new strategy to convert wasted COVID-19 masks into useful products through chemical recycling by pyrolysis. The results showed that pyrolysis at different temperatures yielded valuable solid (biochar), liquid (biooil), and syngas products. By using a two-stage pyrolysis catalytic reactor with sepiolite as a catalyst, the final yield of syngas product increased and the composition of biooils changed. The study also examined the effect of sepiolite regeneration on consecutive pyrolysis tests.
APPLIED SCIENCES-BASEL
(2023)
Article
Biotechnology & Applied Microbiology
Farid Atashi, Mortaza Gholizadeh, Farshad Ataei
Summary: This study evaluated the effects of different carrier gases on the pyrolysis of PET waste in the presence and absence of a zeolite catalyst. The results showed that the catalyst affected the pyrolysis yield and its effect varied with the carrier gas used.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Tianyue Su, Guo-Ping Lu, Kangkang Sun, Pengyu Wu, Chun Cai
Summary: A heterogeneous bimetallic FeNi catalyst has been developed for the selective catalytic pyrolysis of PLA to monomer. The optimal catalyst showed excellent performance with high lactide yield, which is significant for the circular utilization of biodegradable plastic wastes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Sriram Srinivasan, Abbas Saifee Valsadwala, S. Shamshath Begum, Asit Baran Samui
Summary: In the present study, a novel catalyst was used for co-pyrolysis of automobile plastic scrap and tyre crumb rubber, resulting in a high proportion of gasoline production; incorporation of the solid product char into linear low-density polyethylene to prepare a composite showed higher mechanical properties.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Piyaporn Kasetsupsin, Tharapong Vitidsant, Aminta Permpoonwiwat, Naphat Phowan, Witchakorn Charusiri
Summary: Catalytic pyrolysis of waste polyethylene wax can achieve high yield and desirable product distribution, contributing to the exploration of circular economy and waste reduction. The catalysts play a crucial role in the conversion of waste polyethylene wax under specific conditions.
Article
Energy & Fuels
J. Eimontas, N. Striugas, K. Zakarauskas, I. Kiminaite
Summary: The eutrophication processes and water pollution caused by marine plastic waste are significant ecological problems. This study analyzed the used fishing nets and found that thermal treatment at 700 degrees Celsius with Y-Type catalyst could result in a high yield (96%) of caprolactam. This research provides insights for the recovery and utilization of marine plastic waste in a circular economy.
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)