Article
Energy & Fuels
Elham Nejadmoghadam, Abdenour Achour, Pouya Sirous-Rezaei, Muhammad Abdus Salam, Prakhar Arora, Olov Ohrman, Derek Creaser, Louise Olsson
Summary: This study investigates the thermal and catalytic hydrotreatment of a simulated pyrolysis oil and compares the effects of reaction conditions and different oxygenated organic compounds on product yields and properties. It finds that the presence of oxygenated furan and sugar compounds significantly affects the yield of liquid product and promotes solid formation. Stabilizing furan, especially with attached carbonyl groups and sugar derivatives, is important for improving upgrading efficiency in pyrolysis oil.
Article
Chemistry, Applied
M. Slezackova, A. Peller, J. Mikulec, M. Banic, J. Blasko, E. Hajekova
Summary: Inedible camelina oil (CSO) can be used as diesel components after hydrotreatment. Under suitable conditions, CSO with high unsaturation can be converted into alkanes, aromatics and higher olefins. The co-hydrotreatment with paraffinic solvents can achieve high triacylglyceride conversion into hydrocarbons.
Article
Energy & Fuels
Dmitry A. Sukhorukov, Roman G. Kukushkin, Maria V. Alekseeva (Bykova), Olga A. Bulavchenko, Olesya O. Zaikina, Mikhail E. Revyakin, Maxim O. Kazakov, Vadim A. Yakovlev
Summary: This paper focuses on upgrading sewage sludge-derived pyrolysis oil through hydrotreatment using catalysts. The results show that effective heteroatom removal can be achieved, especially with the NiMoPS/Al2O3 catalyst at 400 degrees C. Additionally, the catalysts used in the process accumulate certain impurities, indicating the importance of selecting appropriate catalysts and construction materials for further study.
Article
Engineering, Environmental
Stian Hersvik Hegdahl, Camilla Lohre, Tanja Barth
Summary: This study investigates the production of bio-oil using digested sewage sludge (DSS) from a biogas plant. By adjusting the time, temperature, and adding a base as a catalyst, high conversion yields and energy recovery are achieved. The resulting oils contain potential biofuels and building blocks.
WASTE MANAGEMENT & RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Dengke Xi, Feng Qi, Rusen Zhou, Xianhui Zhang, Zhi Fang, Renwu Zhou, Kostya (Ken) Ostrikov, Size Yang
Summary: Due to limited processing techniques, much sewage sludge is not treated effectively, leading to pollution and resource waste. This study successfully converted sewage sludge into biocrude and fly ash-like residue using plasma-electrolytic technology. The resulting crude oil had low N and S content and high heating value, while the residue showed similar properties to fly ash and met the national standard for preparation of paving blocks. This plasma-enabled approach provides a viable option for biomass and waste utilization, with significant socioeconomic and environmental benefits.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Energy & Fuels
Hongbo Jiang, Xinge Sun, Hailong Lv, Wenbin Chen, Kang Qin, Mingfeng Li, Hong Nie
Summary: By systematically studying the kinetics of hydrodenitrogenation (HDN) in an isothermally high-throughput reactor over three kinds of catalysts, kinetic parameters for the reaction of diesel oil were obtained. Two kinetic models considering the influence of self-inhibition were proposed, and both models showed satisfactory results in fitting the experimental data.
Article
Agricultural Engineering
Shuo Zhang, Xiangyu Guo, Zhe Zhu, Zhiqiang Sun, Jinjun Yang, Junying Zhao, Lie Shen, Lasse Rosendahl, Guanyi Chen
Summary: Subcritical hydrothermal liquefaction (HTL) of wet sewage sludge (SS) was pretreated with sodium hypochlorite (NaClO) or combination of NaClO and ultrasonic treatment. The combination pretreatment resulted in an increased bio-oil yield and changed the chemical composition of the bio-oil.
BIOMASS & BIOENERGY
(2023)
Article
Energy & Fuels
Yuwadee Plaola, Wanwipa Leangsiri, Kanokthip Pongsiriyakul, Worapon Kiatkittipong, Atthapon Srifa, Jun Wei Lim, Prasert Reubroycharoen, Kunlanan Kiatkittipong, Apiluck Eiad-ua, Suttichai Assabumrungrat
Summary: This study investigated the catalytic activity and stability of Ni-MoS2 supported on different catalyst supports for the deoxygenation of different feedstocks. The results showed that the catalytic performance was influenced by both the purity of the feedstock and the characteristics of the catalyst supports. NiMo/γ-Al2O3 exhibited a high resistance to impure feedstock and excellent stability.
Article
Energy & Fuels
Wenbin Huang, Yasong Zhou, Qiang Wei, Xiaodong Liu, Pengfei Zhang, Zhusong Xu, Zhiqing Yu, Xiaohan Wang, Haoran Liu, Xiaojun Dai, Han Yang
Summary: In this study, mesoporous TiO2-Al2O3 composites with different Ti/Al molar ratios were successfully synthesized and used as supports for NiW catalysts. The effects of Ti modification on the physicochemical properties of the supports and catalysts were investigated. It was found that Ti modification improved the HDN performance of the catalysts.
Article
Chemistry, Applied
Idia G. Nascimento, William de R. Locatel, Bruno C. Magalhaes, Leonardo Travalloni, Jose L. Zotin, Monica A. P. da Silva
Summary: This study aimed to estimate the kinetic parameters of DBT HDS reactions, with two power-law models providing good fits to the experimental data with different levels of detail. The estimation of parameters related to biphenyl hydrogenation to cyclohexylbenzene was hindered due to its significance only at conditions with high DBT conversions.
Article
Engineering, Environmental
Hasan Merdun, Zakari Boubacar Laouge, Ismail Veli Sezgin, Asli Seyhan Ciggin
Summary: Studies on evaluating sewage sludge as a feedstock for thermochemical processes have made significant progress. It is important to determine the stage of sewage sludge treatment for incorporating thermochemical processes into wastewater treatment plants and configuring the optimal process scheme. Pyrolysis is a crucial process for resource recovery, producing bio-oil and biochar. The aim of this study was to determine the optimal process scheme for pyrolysis of different sewage sludges, and the conditions for maximum bio-oil yield were investigated using thermogravimetric analysis.
Article
Energy & Fuels
Lyvia Nara Barroso Menezes, Edgar A. Silveira, Joao Vitor Sollero Mazzoni, Rafael B. W. Evaristo, Juliana Sabino Rodrigues, Giulia Cruz Lamas, Paulo Anselmo Ziani Suarez, Grace Ferreira Ghesti
Summary: This research explores the production of biochar and bio-oil through pyrolysis of sewage sludge, providing an innovative and environmentally friendly method for waste management. The study found that biochar produced from secondary sludge had superior properties compared to primary and tertiary sludge, while the extracted oil showed potential as a feedstock for second-generation waste biorefineries. These findings have implications for waste mitigation and meeting energy demands in growing cities.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Green & Sustainable Science & Technology
Zhong Chen, Kun Tong, Chunlan He, Ming Xue, Chong Lyu, Hongzhen Chen, Qiao Chen, Yuanjian Xu
Summary: In this study, near-/supercritical water was utilized as a green medium for extracting and upgrading heavy oil from oil-based drill cuttings. The addition of industrial wastes such as nickel-rich electroplating sludge showed promising catalytic effects in improving the quality of the recovered oil. The active components in these wastes, such as metallic oxides and ferrite, played a crucial role in the upgrading reactions, resulting in high quality oil with zero asphaltene and extremely low heteroatom content.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Carol Huang, Badr A. Mohamed, Loretta Y. Li
Summary: This study evaluates the feasibility of pyrolysis scenarios for sewage sludge treatment using life-cycle assessment, energy consumption analysis, carbon emission analysis, and economic benefit analysis. Results show that pyrolysis scenarios producing bio-oil and biochar have significant improvement in terms of environmental impact and profitability, making them eco-friendly sewage sludge treatment methods.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Thermodynamics
Guiying Xu, Shan Wang, Xinghui Cai, Jiangnan Mei, Haojun Zou, Li Zhang, Haifeng Qian
Summary: This research investigates the co-pyrolysis of sewage sludge and wheat straw. The effects of mix ratio and interactions between SS and WS were studied using TG and fixed bed. The mix ratio, N2 flow rate, and pyrolysis temperature were examined for fixed bed pyrolysis, and the response surface method was applied to optimize the process. Increasing the WS ratio reduces pyrolysis residual rate, and there were substantial interactions between 200 and 400 degrees during co-pyrolysis. The syngas and bio-oil yields in fixed bed pyrolysis were mainly affected by N2 flow rate and pyrolysis temperature.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
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)