Article
Thermodynamics
Dengyu Chen, Kehui Cen, Xiaozhuang Zhuang, Ziyu Gan, Jianbin Zhou, Yimeng Zhang, Hong Zhang
Summary: This study investigated the pyrolysis behavior and product of the three major components of biomass. The results showed that their characteristics and thermal stability were related to their unique chemical structures. Different volatiles were generated during pyrolysis, and the thermal decomposition pathways of cellulose, hemicellulose, and lignin were proposed.
COMBUSTION AND FLAME
(2022)
Article
Environmental Sciences
Dhakshinamoorthy Gnana Prakash, Kannappan Panchamoorthy Gopinath, Sevalur Mahendran Prasanth, Sivakumaran Harish, Muthamilselvam Rishikesh, Ramachandran Sivaramakrishnan, Arivalagan Pugazhendhi
Summary: In this study, lignin from sugarcane bagasse was extracted using three different methods. The results showed that the Ethanosolv method had the highest lignin yield and extent of depolymerization during solvothermal liquefaction. The biochar obtained from the process was found to have good adsorption capabilities for various heavy metals.
Article
Engineering, Environmental
Yuchao Shao, Weizhong Huo, Rong Ye, Yanqing Liu, Muhammad Ajmal, Wenjing Lu
Summary: This study investigated the humification behavior of lignocellulosic components under acid-alkali two-step hydrothermal treatment and revealed their contribution to hydrothermal humic acid (HHA). It was found that lignin had the highest HHA contribution, while cellulose and hemicellulose had lower contributions. The hydrochar derived from these components showed higher humification capability than the hydrothermal solution. Co-hydrothermal treatment of the components improved HHA production. The chemical characteristics of the resulting HHA products were similar to natural humic acids.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Kapil Khandelwal, Sonil Nanda, Philip Boahene, Ajay K. Dalai
Summary: The global warming problem caused by the rapid use of fossil fuels is leading to an increased demand for sustainable energy sources, such as hydrogen. The demand for hydrogen has quadrupled from 18 million tons in 1975 to 90 million tons in 2020, and is projected to reach 180 million tons by 2030. This article reviews the conversion of biomass into hydrogen-rich syngas using supercritical water gasification, focusing on the thermophysical properties of supercritical water and the parameters influencing water gasification. The processes and reactions influencing the distribution of products during water gasification include hydrolysis, water-gas shift, methanation, hydrogenation, and reforming.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Energy & Fuels
Lixin Qian, Bojun Zhao, Haoyu Wang, Guangda Bao, Yulin Hu, Chunbao Charles Xu, Hongming Long
Summary: This study evaluated the utilization of spent catalyst in hydrothermal liquefaction and found that the spent VWTi catalyst significantly promoted the production of bio-oil. The bio-oil obtained under optimal conditions had a high HHV and energy recovery, with a higher fraction of phenolics compounds identified.
Article
Energy & Fuels
Javier A. Jimenez Forero, Tuyen H. T. Tran, Tana Tana, Adrian Baker, Jorge Beltramini, William O. S. Doherty, Lalehvash Moghaddam
Summary: This study investigated the effect of solvent on the stability of bio-oils produced from the hydrothermal liquefaction of sugarcane bagasse. It was found that the ethanol/water solvent mixture produced the most stable bio-oil compared to other solvents. The light oils fractionated by solvent extraction were also more stable than their corresponding bio-oils. The stabilities of the oils were related to alkylation, esterification, and acetalization reactions. This study demonstrated that the HTL of sugarcane bagasse in the presence of ethanol/water produces high-quality oils with long shelf-lives.
Article
Engineering, Environmental
Jayaraman Rajagopal, Kannapan Panchamoorthy Gopinath, Rajendran Neha, Krishnan Aakriti, Ramesh Sai Jayaraman, Jayaseelan Arun, Arivalagan Pugazhendhi
Summary: This study investigates the production of bio-hydrogen from household mixed waste through hydrothermal gasification (HTG) and hydrothermal liquefaction (HTL) experiments. The results show that both HTG and HTL processes can yield high amounts of hydrogen and bio-oil under specific temperature and solvent to waste ratios, providing support for the utilization of household mixed waste as an energy source.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Benjamin G. Keiller, Matthew Potter, Rachel A. Burton, Philip J. van Eyk
Summary: The study found that in hydrothermal carbonisation, hemicellulose in hemp degrades rapidly while lignin degrades slowly. Under HTC conditions, lignin in hemp hull degrades rapidly to a constant level, while models were built to describe the degradation of lignin in hemp stem.
Article
Polymer Science
Anda Barkane, Oskars Platnieks, Liga Grase, Sergejs Gaidukovs
Summary: This study investigates the tunable and durable vegetable oil-based UV-curing composite resins. By adding lignocellulosic components such as cellulose nanocrystals, cellulose nanofibres, hemicellulose, and lignin, the thermal stability, thermomechanical properties, transparency, surface morphology, and wettability of the resin can be improved. Strong interaction between the lignocellulosic components and the polymer matrix enhances the thermomechanical properties of the composite. The surface morphology and wettability of the composite can be tuned by the addition of different lignocellulosic components. The effects of different components on the transparency of the resin are also evaluated.
Article
Engineering, Chemical
Ankit Kumar, Priyanka Yadav, Sivamohan N. Reddy
Summary: In this study, in-situ hydrothermal liquefaction of direct Cu salt solution with lignin and Cu-impregnated lignin was conducted to increase bio-oil yield and produce nanometal carbon hybrids. The performance of both processes was evaluated by varying the temperature (200°C to 320°C) and assessing the bio-oil yields. The maximum bio-oil yields achieved were 28.74% and 24.87% for impregnated and direct processes, respectively, at the optimum condition of 280°C, 15 min, and feed-to-solvent ratio of 1:9, which is nearly double the non-catalytic bio-oil yields (10.16%) under similar operating conditions. XRD analysis confirmed the transition of Cu2+ to Cu+ and Cu, while TEM revealed average Cu particle sizes of 15.9 nm and 62.1 nm in hybrids material obtained from direct Cu effluent and Cu-impregnated lignin, respectively.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Jianwen Lu, Guifang Fan, Mingde Yang, Yulong Wu
Summary: The interaction between protein and glucose influences the nitrogen content and oxygen content in the bio-oil during HTL, while the carbon in glucose does not participate in the formation of certain compounds. The results provide insight into the interaction mechanism between protein and glucose for further studies.
Article
Chemistry, Analytical
Hao Li, Zhen Dong, Bao Wang, Wenfu Wu, Maojiong Cao, Yuanhui Zhang, Zhidan Liu
Summary: Catalytic pyrolysis was used to upgrade raw biocrude from hydrothermal liquefaction of Spirulina, resulting in improved quality of the bio-oil without the need for costly hydrogen. The addition of Fe-HZSM-5 catalyst significantly increased the carbon content and higher heating value of the upgraded bio-oil. Furthermore, the composition of the bio-oil was altered, with a reduction in nitrogen-containing compounds and an increase in hydrocarbons.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Agricultural Engineering
Jiahui Wei, Lizhen Wang, Shengcheng Zhai, Huamin Zhai, Hao Ren
Summary: The study investigated the depolymerization and dissolution of naked oat stem cell wall in subcritical water conditions, revealing the potential of naked oat stems as raw materials for green biorefinery. Results showed that lignin and hemicellulose removal rates were highest at 190 degrees Celsius, with substantial removal achieved. This research provides insight into overcoming the resistance of lignocellulosic biomass composite cell walls to depolymerization in a single green solvent.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Polymer Science
Shuang Shan, Xiao-Feng Sun, Yangyang Xie, Wenbo Li, Tiezheng Ji
Summary: The study developed a novel hydrogel adsorbent using cellulose, hemicellulose, and lignin from wheat straw, which exhibited excellent adsorption performance for copper(II) ions due to its porous structure and high water retention capacity.
Article
Agricultural Engineering
Shuang Wang, Shuang Zhao, Xiaoxue Cheng, Lili Qian, Bahram Barati, Xun Gong, Bin Cao, Chuan Yuan
Summary: This study examined the conversion of Enteromorpha clathrata into bio-oil through hydrothermal liquefaction, finding that a two-step reaction method can increase bio-oil yield and improve quality.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Kristaps Malins, Valdis Kampars, Janis Brinks, Ilze Neibolte, Raimonds Murnieks
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Multidisciplinary Sciences
Raimonds Murnieks, Lauma Apseniece, Valdis Kampars, Zane Shustere, Kristaps Malins
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2016)
Article
Agricultural Engineering
Kristaps Malins, Valdis Kampars, Janis Brinks, Ilze Neibolte, Raimonds Murnieks, Ruta Kampare
BIORESOURCE TECHNOLOGY
(2015)
Article
Chemistry, Physical
Kristaps Malins, Janis Brinks, Valdis Kampars, Ilze Malina
APPLIED CATALYSIS A-GENERAL
(2016)
Article
Agricultural Engineering
Raimonds Murnieks, Valdis Kampars, Kristaps Malins, Lauma Apseniece
BIORESOURCE TECHNOLOGY
(2014)
Article
Energy & Fuels
Kristaps Malins, Valdis Kampars, Ruta Kampare, Julija Prilucka, Janis Brinks, Raimonds Murnieks, Lauma Apseniece
Article
Chemistry, Applied
Kristaps Malins
FUEL PROCESSING TECHNOLOGY
(2018)
Article
Chemistry, Applied
Janis Brinks, Kristaps Malins, Valdis Kampars, Julija Prilucka, Lauma Apseniece
POLISH JOURNAL OF CHEMICAL TECHNOLOGY
(2013)
Article
Energy & Fuels
Kristaps Malins
Summary: Screening tests were carried out on various monometallic and bimetallic catalysts synthesized by different impregnation methods to evaluate their performance and selectivity for hydrocarbon production from vegetable oil feedstock with high FFA content. Among them, the Mo-promoted Ni17Mo3DP catalyst exhibited great performance and selectivity, achieving a higher hydrocarbon yield and demonstrating potential for producing renewable hydrocarbons from fatty acid containing raw materials.
Article
Green & Sustainable Science & Technology
Kristaps Malins
Summary: The study investigated the performance, selectivity, recovery, and reusability of a commercial Ni66 +/- 5%/SiO2-Al2O3 catalyst in renewable hydrocarbon synthesis. By using a solvent-free one-pot hydrotreatment method, combustible gases and high yield linear saturated hydrocarbons were successfully produced from low cost raw material pretreated soapstock, indicating the potential for green energy production.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Pengcheng Zhao, Jingang Wang, Liming Sun, Yun Li, Haiting Xia, Wei He
Summary: The production of green hydrogen through water electrolysis is crucial for renewable energy utilization and decarbonization. This research explores the optimal electrode configuration and system design of compactly-assembled industrial electrolyzer. The findings provide valuable insights for industrial application of water electrolysis equipment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
V. Baiju, P. Abhishek, S. Harikrishnan
Summary: Thermally driven adsorption desalination systems (ADS) have gained attention as an eco-friendly solution for water scarcity. However, they face challenges related to low water productivity and scalability. To overcome these challenges, integrating ADS with other desalination technologies can create a small-scale hybrid system. This study proposes integrating ADS with a Thermo Electric Dehumidification (TED) unit to enhance its performance.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao
Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chaoying Li, Meng Wang, Nana Li, Di Gu, Chao Yan, Dandan Yuan, Hong Jiang, Baohui Wang, Xirui Wang
Summary: There is an urgent need to shift away from heavy dependence on fossil fuels and embrace renewable energy sources, particularly in the energy-intensive oil refining process. This study presents an innovative concept called the Solar Oil Refinery, which applies solar energy in oil refining. A solar multi-energies-driven hybrid chemical oil refining system that utilizes solar pyrolysis and electrolysis has been developed, significantly improving solar utilization efficiency, cracking rate, and hydrogen yield.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chao Ma, Guanghui Wang, Dingbiao Wang, Xu Peng, Yushen Yang, Xinxin Liu, Chongrui Yang, Jiaheng Chen
Summary: This study proposes a bio-inspired fish-tail wind rotor to improve the wind power efficiency of the traditional Savonius rotor. Through transient simulations and orthogonal experiments, the key factors affecting the performance are identified. A response surface model is constructed to optimize the power coefficient, resulting in an improvement of 9.4% and 6.6% compared to the Savonius rotor.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sina Bahmanziari, Abbas-Ali Zamani
Summary: This paper proposes a new framework for improving electrical energy harvesting from piezoelectric smart tiles through a combination of magnetic plucking, mechanical impact, and mechanical vibration force mechanisms. Experimental results demonstrate a significant increase in energy yield and average energy harvesting time compared to other mechanisms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Nanjiang Dong, Tao Zhang, Rui Wang
Summary: This study establishes a multiobjective mixed-variable configuration optimization model for a comprehensive combined cooling, heating, and power energy system, and proposes an efficient generating operator to optimize this model. The experimental results show that the proposed algorithm performs better than other state-of-the-art algorithms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Ahmed E. Mansy, Eman A. El Desouky, Tarek H. Taha, M. A. Abu-Saied, Hamada El-Gendi, Ranya A. Amer, Zhen-Yu Tian
Summary: This study aims to convert office paper waste into bioethanol through a sustainable pathway. The results show that physiochemical and enzymatic hydrolysis of the waste can yield a high glucose concentration. The optimal conditions were determined using the Box-Behnken design, and a blended membrane was used for ethanol purification.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sven Klute, Marcus Budt, Mathias van Beek, Christian Doetsch
Summary: Heat pumps are crucial for decarbonizing heat supply, and steam generating heat pumps have the potential to decarbonize the industrial sector. This paper presents the current state, technical and economic data, and modeling principles of steam generating heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Le Zhang, To-Hung Tsui, Yen Wah Tong, Pruk Aggarangsi, Ronghou Liu
Summary: This study investigates the effectiveness of a current-carrying-coil-based magnetic field in promoting anaerobic digestion of chicken manure. The results show that the applied magnetic field increases methane yield, decreases carbon dioxide production, and reduces the concentration of ammonia nitrogen. Microbial community analysis reveals the enrichment of certain methanogenic genera and enhanced metabolic pathways. Pilot-scale experiments confirm the technical effectiveness of the magnetic field assistance in enhancing anaerobic digestion of chicken manure.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Bo Chen, Ruiqing Ma, Yang Zhou, Rui Ma, Wentao Jiang, Fan Yang
Summary: This paper presents an advanced energy management strategy for fuel cell hybrid electric heavy-duty vehicles, focusing on speed planning and energy allocation. By utilizing predictive co-optimization control, this strategy ensures safe inter-vehicle distance and minimizes energy demand. Simulation results demonstrate the effectiveness of the proposed method in reducing fuel cell degradation cost and overall operation cost.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Fabio Fatigati, Roberto Cipollone
Summary: Organic Rankine Cycle-based microcogeneration systems that use solar sources to generate electricity and hot water can help reduce CO2 emissions in residential energy-intensive sectors. The adoption of a recuperative heat exchanger in these systems improves efficiency, reduces thermal power requirements, and saves on electricity costs.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Lipeng He, Renwen Liu, Xuejin Liu, Xiaotian Zheng, Limin Zhang, Jieqiong Lin
Summary: This research proposes a piezoelectric-electromagnetic hybrid energy harvester (PEHEH) for low-frequency wave motion and self-sensing wave environment monitoring. The PEHEH shows promising power output and the ability to self-power and self-sense the wave environment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Shangling Chu, Yang Liu, Zipeng Xu, Heng Zhang, Haiping Chen, Dan Gao
Summary: This paper studies a distributed energy system integrated with solar and natural gas, analyzes the impact of different parameters on its energy utilization and emissions reduction, and obtains the optimal solution through an optimization algorithm. The results show that compared to traditional separation production systems, this integrated system achieves higher energy utilization and greater reduction in carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Qingpu Li, Yaqi Ding, Guangming Chen, Yongmei Xuan, Neng Gao, Nian Li, Xinyue Hao
Summary: This paper proposes and studies a piston-type thermally-driven pump with a structure similar to a linear compressor, aiming to eliminate the high-quality energy consumption of existing pumps and replace mechanical pumps. The coupling mechanism of working fluid flow and element dimension is analyzed based on force analysis, and experimental data analysis is used to determine the pump operation stroke. Theoretical simulation is conducted to analyze the correlation mechanism of the piston assembly. The research shows that the thermally-driven pump can greatly reduce power consumption and has potential for industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2024)
