Article
Chemistry, Multidisciplinary
Santiago Orozco, Maite Artetxe, Gartzen Lopez, Mayra Suarez, Javier Bilbao, Martin Olazar
Summary: The study shows that continuous catalytic cracking of polyethylene over a spent FCC catalyst can achieve high catalyst activity and effectively recycle plastics at high temperatures, resulting in olefin products mainly composed of C5-C11 hydrocarbons.
Article
Green & Sustainable Science & Technology
Huei Yeong Lim, Shu Hui Tang, Yee Ho Chai, Suzana Yusup, Mook Tzeng Lim
Summary: This study investigated the co-pyrolysis of food and plastic wastes represented by MSW in a downdraft pyrolyzer using synthetic flue gas composition. The bio-oil yield and quality were determined by pyrolysis temperature and types of feedstocks. The bio-oil showed potential as an alternative fuel after further treatments and processing.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Green & Sustainable Science & Technology
Huei Yeong Lim, Shu Hui Tang, Yee Ho Chai, Suzana Yusup, Mook Tzeng Lim
Summary: The growing global population has led to an increased energy demand and generation of municipal solid wastes (MSW). This study investigated the co-pyrolysis of food and plastic wastes to produce green renewable fuels via pyrolysis technology. The results showed that the pyrolysis temperature and types of feedstocks had an impact on the bio-oil yield and quality. The bio-oil from this study has the potential to be used as an alternative fuel with further treatments and processing.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Engineering, Chemical
Sanaa Hafeez, Maarten Van Haute, Achilleas Constantinou, Sultan M. Al-Salem
Summary: A comprehensive process simulation was developed to study the pyrolysis of LLDPE in an FBR, with the focus on the pyrolytic oil and wax yields. The simulation showed a decrease in oil yield with increasing temperature, due to the vibration of the polymer matrix and absorbed thermal energy. A higher gas yield and negligible wax formation at 700 degrees C were observed, which is beneficial for controlling plastic waste. The simulation was validated with experimental data, showing less than 10% discrepancy.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Energy & Fuels
Maninderjit Singh, Shakirudeen A. Salaudeen, Brandon H. Gilroyed, Animesh Dutta
Summary: A detailed process model for co-gasification of biomass and plastics in a fluidized bed reactor was developed using Aspen Plus software. The effects of process parameters such as plastic content and reactor temperature on the composition and properties of syngas were investigated. The results showed that increasing the plastic content led to higher hydrogen concentrations in the syngas, and increasing the gasification temperature resulted in increased hydrogen content and higher heating value of the syngas.
Article
Engineering, Environmental
Santiago Orozco, Laura Santamaria, Maite Artetxe, Jon Alvarez, Javier Bilbao, Martin Olazar, Gartzen Lopez
Summary: The continuous catalytic fast pyrolysis of plastics was studied using a conical spouted bed reactor equipped with a fountain confiner and draft tube. An inexpensive equilibrium fluid catalytic cracking (FCC) catalyst was used. Operating under oxidative conditions improved product distribution and catalyst activity and stability. The role of the presence of air in the reaction environment on catalyst stability and deactivation mechanism was assessed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Mohamed H. M. Ahmed, Nuno Batalha, Zeid A. ALOthman, Yusuke Yamauchi, Yusuf Valentino Kaneti, Muxina Konarova
Summary: This study reported the development of a novel multifunctional catalyst by modifying red mud for the co-pyrolysis of biomass and polyethylene. The hybrid catalyst exhibited higher porosity and catalytic activity, leading to an increase in the produced oil's H/Ceff value, making it a more suitable fuel.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Francesco Parrillo, Filomena Ardolino, Carmine Boccia, Gabriele Cali, Davide Marotto, Alberto Pettinau, Umberto Arena
Summary: Co-gasification tests were conducted in a large-scale gasifier to treat plastics and biomass mixtures. The results showed that the ratio of plastics/biomass and equivalence ratio significantly affected the gasifier performances. The obtained syngas had a low heating value between 7 and 10 MJ/m3N.
Article
Green & Sustainable Science & Technology
Gayatri Sabat, Narayan Gouda, Pabitra Mohan Mahapatra, Rutuparna Mahakhud, Achyut K. Panda
Summary: The addition of beeswax to plastic during co-pyrolysis has been found to significantly reduce the activation energy of the reaction, particularly for polystyrene (PS). Furthermore, the thermodynamic parameters of the thermal degradation of the plastic-beeswax blend are also affected.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Green & Sustainable Science & Technology
Shaohua Du, Shouzheng Yuan, Qiang Zhou
Summary: The study focuses on the co-gasification of PET and coal in a fluidized bed reactor, taking into account variations in particle size, density, and devolatilization reaction rate modification. The model's effectiveness is verified by comparing simulation results with experimental data. Furthermore, the study discusses the impacts of inlet gas velocity, solid feed position, and initial particle size on hydrodynamics and co-gasification reaction.
Article
Engineering, Environmental
Jiaxing Song, Jun Wang, Xudong Du, Yuhan Pan, Jingyuan Sima, Youqi Zhu, Qunxing Huang
Summary: Non-thermal plasma-assisted catalytic pyrolysis is a promising technology for producing BTEX from mixed waste plastics. This study focused on preparing Ga-modified zeolites as catalysts. The results showed that Ga loading effectively increased the BTEX yields, with HZSM-5-Ga-N2 exhibiting the highest selectivity and yield.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Jose Manuel Riesco-Avila, James R. Vera-Rozo, David A. Rodriguez-Valderrama, Diana M. Pardo-Cely, Bladimir Ramon-Valencia
Summary: The effects of heating rate and temperature on the thermal-pyrolytic yield of a plastic-waste mixture were investigated. Higher temperatures and shorter residence time resulted in lower pyrolytic oil yield but increased gaseous product yield. The fractionation process yielded light, medium, and heavy fractions with different calorific values and indices.
Article
Chemistry, Physical
Dingding Yao, Haiping Yang, Qiang Hu, Yingquan Chen, Hanping Chen, Paul T. Williams
Summary: In this study, carbon nanotubes were produced from post-consumer mixed waste plastics using a pyrolysis-catalysis process, with the Ni-Fe/MCM41 catalyst displaying the highest catalytic activity. The order of catalytic activity was related to differences in catalyst pore volume and catalyst reducibility, with the formation of a Ni-Fe alloy suggested to be crucial for the promotion of carbon nanotube formation. By-product production of hydrogen at large quantities could be utilized as process fuel.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Thermodynamics
Dan Li, Shijun Lei, Gulzeb Rajput, Lei Zhong, Wenchao Ma, Guanyi Chen
Summary: This study investigated the co-pyrolysis process of waste tires and three typical kinds of waste plastics using TG-FTIR/MS, revealing the synergy effect during the co-pyrolysis process and analyzing the distribution of products.
Article
Energy & Fuels
Bablu Alawa, Sankar Chakma
Summary: The production of hydrocarbon-rich liquid fuels from mixed waste plastics through the catalytic pyrolysis process is reported, including engine performance. Four different catalysts were prepared and characterized, and their catalytic activity in pyrolysis process was assessed. The fuel properties were determined using various ASTM methods. The analysis showed that catalysts can change fuel properties such as viscosity, density, cloud & pour points, flash & fire points, calorific values, etc. The GC-MS results suggested a higher fraction of lower hydrocarbons (66-85%).
