Article
Energy & Fuels
Jisong Bai, Xin Fu, Quanwei Lv, Fangjun Chen, Yu Yang, Jun Wang, Wei Gan, Fucan Deng, Chenxuan Zhu
Summary: Co-pyrolysis of sewage sludge with pinewood sawdust was investigated using a thermogravimetric analyzer and fixed bed reactor. The results showed a significant synergistic effect between the two materials, with the highest bio-oil yield and changes in compound production observed at 50% sawdust addition. High temperatures were found to decrease certain compound production and increase hydrocarbon production during co-pyrolysis.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Thermodynamics
Dikun Hong, Ping Li, Ting Si, Xin Guo
Summary: This paper investigates the co-pyrolysis behaviors of Zhundong coal with polyethylene (PE) and polystyrene (PS) using reactive molecular dynamics simulation. The results show that coal promotes primary decomposition of PE at low temperatures but has little effect on PE pyrolysis at high temperatures. Meanwhile, PE and PS significantly promote coal char decomposition at high temperatures, with polystyrene having a more pronounced effect than polyethylene.
Article
Energy & Fuels
Quanwei Lv, Yuting Li, Li'ao Wang, Lingyue Liu, Li Liu, Jisong Bai
Summary: This study investigated the thermal behavior, synergistic effect, and reaction mechanism of co-pyrolysis of oil-based drill cuttings (OBDC) and pinewood sawdust (PS). The results showed a positive synergistic effect in the co-pyrolysis, with the strength increasing as the percentage of PS in the blend increased. The apparent activation energy was evaluated using two model-free methods and the reaction mechanism was found to be a combination of reaction order, accelerating, and nuclei growth and diffusion mechanism.
Article
Green & Sustainable Science & Technology
H. Stancin, M. Safar, J. Ruzickova, H. Mikulcic, H. Raclavska, X. Wang, N. Duic
Summary: The study demonstrates that adding a small amount of polyurethane can reduce oxygenated compounds in sawdust and increase oil yield; however, the main liquid products are benzenamines that do not meet fuel composition requirements. Analysis of plastic content shows that liquid yield increases while gas yield decreases.
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
Agricultural Engineering
Federica Nardella, Simona Bellavia, Marco Mattonai, Erika Ribechini
Summary: This paper presents a study on the pyrolytic behavior of mixtures of lignocellulosic biomass with hydrocarbon plastics. The results indicate that synergistic effects during co-pyrolysis have significant impact on the composition and elemental composition of the pyrolysis oils. The changes in H/C and O/C values of the pyrolysis oils suggest that the addition of plastic can improve the quality of the pyrolysis oil.
BIORESOURCE TECHNOLOGY
(2022)
Article
Energy & Fuels
Quynh Van Nguyen, Yeon-Seok Choi, Sang-Kyu Choi, Yeon-Woo Jeong, So-Young Han
Summary: Simultaneous pyrolysis of coffee-grounds and waste polystyrene foam in a fluidized bed reactor at 500°C resulted in higher liquid yield and increased heating value of the oils. Blending at least 25% of polystyrene into coffee-grounds can significantly reduce the oil viscosity. Chemical distributions indicated that the synergy between the two materials enhanced the production of hydrocarbons, especially aromatic compounds.
Article
Energy & Fuels
Tingting Zhang, Zongqing Bai, Zhenxing Guo, Lingxue Kong, Haoyu Dou, Jin Bai, Wen Li
Summary: Co-pyrolysis with low rank coal is an important method for waste plastic treatment and recycling. The complex interactions between different sources during co-pyrolysis have not been well understood. This study investigated the contribution of these interactions to the synergy effect observed during co-pyrolysis of low rank coal and polystyrene. The results provide valuable insights into the interaction mechanisms during co-pyrolysis and help enhance synergistic pathways for target product production.
Article
Green & Sustainable Science & Technology
Saad A. El-Sayed, Mohamed E. Mostafa
Summary: The pyrolysis and co-pyrolysis kinetics of Egyptian olive-pomace and wood dust, as well as their blends, were studied using advanced isoconversional model-free methods and model-fitting methods. The best reaction mechanisms and the synergistic effect of co-pyrolysis were determined. The obtained kinetics parameters were validated using the Coats and Redfern integral method.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Applied
Heryson T. L. Arantes, Marta A. Machado, Mariana C. Santoro, Jair C. C. Freitas, Celia M. Ronconi, Carolina B. P. Ligiero, Servio T. A. Cassini, Igor C. F. Sampaio, Priscilla P. Luz
Summary: Biochar-based catalysts and waste polystyrene were used to study their effects on the yield and composition of oil produced on the intermediate pyrolysis of green coconut pericarp through catalytic co-pyrolysis. Low-cost catalysts, such as steam-activated biochars, were also investigated. The results showed that co-processing biomass and waste plastic led to a higher oil yield and a shift in product composition towards less oxygenated compounds. The combination of waste polystyrene and activated biochar resulted in an oil containing up to 60% xylene and a high heating value of 34.11 MJ kg(-1).
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Energy & Fuels
Kiran Raj G. Burra, Xuan Liu, Zhiwei Wang, Jinhu Li, Defu Che, Ashwani K. Gupta
Summary: The study investigates the interactions between biomass and plastic blends during co-pyrolysis, revealing the different effects of volatile-volatile, volatile-feedstock, and volatile-char interactions. Quantified results show significant increases in H-2 yield due to these interactions, providing insight into enhancing synergy and developing sustainable gasifier development.
Article
Energy & Fuels
Hao Xu, Shuo Cheng, Douglas Hungwe, Kunio Yoshikawa, Fumitake Takahashi
Summary: Torrefaction of rice straw and its co-pyrolysis with oil sludge can enhance the production of hydrocarbons and improve the quality of bio-oil. Co-pyrolysis significantly increases the formation of hydrocarbons and olefins, while suppressing the generation of oxygenates.
Article
Chemistry, Analytical
Xiangfei Xue, Jin Mi, Fanfan Huang, Jingyue Wang, Lanxin Chen, Jie Liang
Summary: Catalytic co-pyrolysis of biomass and plastic waste is a promising approach for producing renewable biofuels and value-added chemicals. However, because of their different pyrolysis behaviors, the synergy between biomass and plastic is limited, and low-yield aromatics are produced. A modified segmented catalytic co-pyrolysis technology was proposed to enhance the synergy between feedstocks.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Analytical
Salomie van der Westhuizen, Francois-Xavier Collard, Johann Gorgens
Summary: This study investigated the pyrolysis of polystyrene (PS) packaging waste and found that contamination affects the oil yield. The study also explored the scale-up of the process. The results showed that the oil product obtained from the pyrolysis of the waste material can be used as fuel, but it needs to be blended with conventional fuel.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Energy & Fuels
Jiehan Zhang, Hang Yang, Guojun Kang, Jian Yu, Shiqiu Gao, Zhouen Liu, Changming Li, Xi Zeng, Shijian Lu
Summary: This study explores the co-pyrolysis of three tannery wastes and reveals the synergistic effect among different materials. Specifically, tanning sludge plays a significant role in promoting the conversion of char to tar/gas, resulting in improved volatile production. Moreover, the catalytic effect of mineral components also contributes to the enhanced co-pyrolysis performance.
Article
Environmental Sciences
Jana Ruzickova, Helena Raclavska, Marek Kucbel, Anna Grobelak, Michal Safar, Konstantin Raclavsky, Barbora Svedova, Dagmar Juchelkova, Konstantinos Moustakas
Summary: Modern technologies have introduced automatic composters for household food waste disposal, but the high electrical conductivity caused by sodium chloride in the composts can lead to environmental risks. Additionally, the presence of pesticides in composted food presents an important environmental problem, with varying pesticide content and the need for effective removal methods to reduce inhibition on organisms like Poecilia reticulata and Daphnia magna.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Barbora Svedova, Dalibor Matysek, Helena Raclavska, Marek Kucbel, Pavel Kantor, Michal Safar, Konstantin Raclavsky
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2020)
Article
Engineering, Environmental
J. Ruzickova, S. Koval, H. Raclavska, M. Kucbel, B. Svedova, K. Raclavsky, D. Juchelkova, F. Scala
Summary: Biochar has been widely studied for its potential benefits as a soil conditioner and bio-accumulator, but its application in agriculture may pose risks to ecosystems due to the presence of toxic organic pollutants. The European Biochar Certificate sets production criteria, but even meeting these values may not prevent biochar from causing phytotoxicity. The presence of water-soluble organic compounds in biochar may be responsible for its phytotoxic effects.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Jana Ruzickova, Helena Raclavska, Michal Safar, Marek Kucbel, Konstantin Raclavsky, Anna Grobelak, Barbora Svedova, Dagmar Juchelkova
Summary: Pesticides were found in the char produced from burning bark pellets in modern boilers, with some pesticides unable to decompose completely at high temperatures. During combustion, certain pesticides were adsorbed onto elemental carbon, requiring temperatures above 750 degrees Celsius for thermal decomposition to occur.
Article
Engineering, Environmental
Jana Ruzickova, Helena Raclavska, Michal Safar, Marek Kucbel, Barbora Svedova, Konstantin Raclavsky, Dagmar Juchelkova, Fabrizio Scala, Pavel Kantor
Summary: This study highlights the environmental risks associated with burning paper/cardboard briquettes, which may release harmful organic compounds affecting human health. It underscores the importance of understanding and managing the potential health hazards posed by the combustion of these materials.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Agricultural Engineering
Helena Raclavska, Jana Ruzickova, Dagmar Juchelkova, Michal Safar, Hana Brtkova, Karolina Slamova
Summary: Processing food waste from food and beverage production in automatic composters can be challenging due to the physicochemical properties of input materials. Optimization by adding bulk materials like sawdust can help, but some compounds in these materials may cause toxicity in the compost. Release of tannins and phenolic compounds could have a significant impact on compost quality.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Jana Ruzickova, Helena Raclavska, Dagmar Juchelkova, Michal Safar, Marek Kucbel, Barbora Svedova, Karolina Slamova, Anna Grobelak
Summary: The utilization of waste wood from furniture production presents new challenges, including incomplete thermochemical decomposition of additives and the identification of unique organic compounds produced through the combustion of waste wood. The combustion deposits from briquettes made from furniture production include organic compounds originating from the decomposition of resins, adhesives, and plasticizers. These compounds may pose potential risks to the environment and human health.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Marek Kucbel, Barbora Svedova, Helena Raclavska, Jana Ruzickova, Konstantin Raclavsky, Michal Safar, Dagmar Juchelkova, Pavel Kantor, A. E. Atabani
Summary: Burning solid fuels in domestic boilers during the heating season increases concentrations of carbonaceous particles, and adding plastics with traditional energy fuels significantly changes carbon concentrations. This study provides a method for identifying banned fuels in domestic boilers.
Article
Thermodynamics
Jana Ruzickova, Helena Raclavska, Dagmar Juchelkova, Marek Kucbel, Konstantin Raclavsky, Barbora Svedova, Michal Safar, Christoph Pfeifer, Jitka Hrbek
Summary: This paper aims to find a simple way to identify the addition of unauthorized waste (plastics) in residential boilers burning wood as the main fuel. The study found that the burning of plastics leaves a trace in char deposits, and the presence of combusted plastics can be identified by analyzing unique organic compounds formed during the pyrolysis phase of combustion using pyrolysis gas chromatography. By sampling char in boilers and analyzing samples for markers of plastics incineration, this method can be used by authorities to identify unauthorized waste combustion.
Article
Chemistry, Multidisciplinary
Jana Ruzickova, Helena Raclavska, Michal Safar, Silvie Koval', Dagmar Juchelkova, Marek Kucbel, Barbora Svedova, Karolina Slamova
Summary: The occurrence and concentration measurement of chemical compounds specific to plastic polymers in compost feedstock were conducted in this study. The study revealed a relationship between the decrease in organic matter concentration and the concentrations of compounds identifying plastic polymers and additives. After three months of composting, the concentrations of compounds specific to polymers decreased by 33-84% while the decrease for additives was 68%.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2022)
Article
Engineering, Mechanical
Jiri Suder, Zdenko Bobovsky, Michal Safar, Jakub Mlotek, Michal Vocetka, Zdenek Zeman
Summary: This study investigates the behavior of annealed 3D printed PLA samples at higher temperatures, revealing that annealing does not significantly affect the glass transition temperature, but can cause deformation under relatively small loads at higher temperatures.
MM SCIENCE JOURNAL
(2021)
Article
Engineering, Environmental
Xingxing Hu, Lingjie Liu, Yanmeng Bi, Lu Li, Chunsheng Qiu, Jingjie Yu, Shaopo Wang
Summary: In this study, the impact of exogenous folate on the start-up process of single-stage partial nitritation-anammox (SPNA) was evaluated using two lab-scale reactors. The results showed that folate addition can enhance nitrogen removal rate, extracellular polymeric substances production, hydrazine oxidase and dehydrogenase activity, as well as the relative abundance of Candidatus Brocadia.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Shaocang He, Tingting Shen, Jing Sun, Haoqi Pan, Chenxu Sun, Tianpeng Li, Runyao Li, Enshan Zhang
Summary: A novel process of acid leaching neutralization was developed for the preparation of inorganic polymeric composite ferric aluminum silicate coagulant (CFAS) using solid waste coal gasification coarse slag (CGCS). The optimized preparation process was determined through single-factor experiment and the performance of CFAS was evaluated for domestic sewage treatment. The results showed that CFAS exhibited excellent coagulation ability and achieved significant removal efficiency for turbidity, ammonia nitrogen, and chemical oxygen demand.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kinga Szatmari, Sandor Nemeth, Alex Kummer
Summary: In this article, a resilience-based reinforcement learning approach is proposed to address the potential thermal runaway issue in batch reactors. By calculating the resilience metric for reactors and utilizing Deep Q-learning to decide when to intervene in the system, resilient-based mitigation systems can be effectively developed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingyou Jiang, Qi Yao, Mingqing Su, Jingjing Li, Kunlun Lu, Dawei Ding, Han Hong
Summary: This study investigates the inhibitory characteristics and mechanisms of ABC powder on coal powder explosion. The addition of ABC powder significantly decreases the maximum explosion pressure and can completely suppress coal dust explosions. The study also reveals the thermal decomposition characteristics and reaction kinetics of the mixed system.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kubilay Bayramoglu, Mustafa Nuran
Summary: This study examines the feasibility of using pyrolytic oil from waste tires as fuel in diesel engines, and evaluates its energy, exergy, and sustainability. The results indicate that pyrolytic oil has potential as a renewable fuel source with relatively high thermal efficiency.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Xinru Duan, Yejia Lv, Jiaxing Hong, Jianzhong Wu, Jia Zhang, Yang Yue, Guangren Qian
Summary: This study successfully prepared a tube reactor with optimized catalyst formula, which showed good performance in removing dioxins and other pollutants in the experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Jiaoyang Du, Xueming Dang, Xiaorong Gan, Xin Cui, Huimin Zhao
Summary: In this study, a photocatalyst-enzyme hybrid system was constructed, which solved the issue of enzyme inactivation caused by high concentration of H2O2 through photocatalytic in-situ H2O2 production, and improved the stability and catalytic efficiency of the enzyme. The effectiveness of the system in treating phenolic EDCs was confirmed through experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Fu-Rong Xiu, Longsheng Zhan, Yingying Qi, Xinyue Lei, Jiali Wang, Haipeng Zhou, Wenting Shao
Summary: This study developed a synergetic and high-efficiency treatment of waste tantalum capacitors (WTCs) and polyvinyl chloride (PVC) using subcritical water process. The treatment significantly reduced the temperature and reaction time for metal tantalum recovery from WTCs, and improved the dechlorination efficiency of PVC. The optimized conditions resulted in 100% resin conversion efficiency of WTCs and 97.39% dechlorination efficiency of PVC. The interaction between decomposition products of WTCs and PVC produced a high level of benzoic acid.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingda Li, Jiaming Song, Yuting Li, Chaoying Meng, Shuxian Wang, Linghao Zong, Honggang Ye, Yishuai Jing, Feng Teng, Peng Hu, Haibo Fan, Guangde Chen, Xin Zhao
Summary: CdPS3 nanosheets, especially those exfoliated by sodium cholate, have shown highly efficient photocatalytic degradation performance. The strong dark adsorption and dye-sensitized photocatalytic properties of CdPS3 nanosheets contribute to high degradation efficiencies of various pollutants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Dongxu Ouyang, Yimei Pang, Bo Liu, Zhirong Wang
Summary: This study investigates the thermal runaway features of lithium-ion cells under tunnel conditions, considering different states of charge and tunnel ceilings. The results show that the tunnel visibility is affected by the smoke generated during thermal runaway, and the shape of the tunnel ceiling influences the temperature rise differently.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
