Article
Chemistry, Applied
Huiyuan Wang, Tan Li, Jing Su, Kai Miao, Kaige Wang
Summary: This study investigated the impact of atmosphere, pressure, and temperature on the product formation during lignin hydropyrolysis. The results showed that high-pressure hydrogen favored the production of condensable vapors and permanent gases while inhibiting char formation and promoting the generation of non-methoxy phenolics.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Ben Niu, Menglong Niu, Juntao Zhang, Ruichun Liu, Hanbin Zhong, Haoquan Hu
Summary: This study investigated the mechanism of coal hydropyrolysis using deuterium tracer method. The results show that H-2 can react with stable radicals in coal at low temperatures and hydrogen atoms mainly enter tar through radicals induce effect during coal pyrolysis.
Article
Energy & Fuels
Tan Li, Jing Su, Huiyuan Wang, Cong Wang, Wen Xie, Kaige Wang
Summary: NiMo-doped catalysts were studied for the conversion of lignin to drop-in fuel using catalytic hydro pyrolysis. The influence of different carriers and Ni/Mo molar ratios on the product distribution was investigated. The results showed that NiMo-doped catalysts exhibited good catalytic activity in the hydro pyrolysis process, effectively removing oxygen from lignin and producing high yields of condensable hydrocarbons.
Review
Agricultural Engineering
Shinyoung Oh, Jechan Lee, Su Shiung Lam, Eilhann E. Kwon, Jeong-Myeong Ha, Daniel C. W. Tsang, Yong Sik Ok, Wei-Hsin Chen, Young-Kwon Park
Summary: Recent studies have shown that fast hydropyrolysis is a promising technology for converting biomass into liquid fuels, producing more aromatic hydrocarbons and reducing the oxygen content of bio-oil. Current research focuses on both non-catalytic and catalytic fast hydropyrolysis processes, as well as efforts to combine fast hydropyrolysis with hydrotreatment processes. Future research directions and challenges in fast hydropyrolysis are also discussed.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Magnus Zingler Stummann, Martin Hoj, Jostein Gabrielsen, Lasse Rongaard Clausen, Peter Arendt Jensen, Anker Degn Jensen
Summary: Catalytic hydropyrolysis has shown promise as a method for producing liquid hydrocarbon fuels from lignocellulosic biomass, but there is still limited research in this field and the process remains not well-understood. Through analysis of literature and laboratory research, a mechanistic model for catalytic hydropyrolysis of biomass has been proposed, along with discussions on the influence of hydrogenation catalyst on product distribution and catalyst deactivation. Comparisons with other pyrolysis technologies have been made, highlighting and discussing the challenges for catalytic hydropyrolysis.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Thermodynamics
Xiaoxue Cheng, Ding Jiang, Bin Cao, Shuang Wang, Hongping Li, Bahram Barati, Zhen Xia, Jinsong Zhou, Shurong Wang
Summary: In this study, the products and reaction mechanisms of cellulose during non-catalytic and catalytic pyrolysis with ZSM-5 catalyst were analyzed using Py-GC/MS and DFT. The results showed that catalytic pyrolysis reduced the furan content and introduced aromatic hydrocarbons as new components. DFT studies demonstrated the involvement of hydrogen proton at the catalyst's acid sites in most cellulose pyrolysis reactions. Catalytic pyrolysis significantly lowered the activation energy for dehydration and de-carbonylation compared to non-catalytic pyrolysis.
COMBUSTION AND FLAME
(2022)
Article
Agricultural Engineering
Yuanyu Tian, Jie Li, Wei Wei, Peijie Zong, Di Zhang, Yanan Zhu, Yingyun Qiao
Summary: The study revealed that adding hydrogen in fast partial hydropyrolysis of biomass can significantly increase volatile matter generation and the yields of CH4 and light tar. Alkali and alkaline earth metals play a significant catalytic role in the reactions, while operating temperature and gas flow rate also impact product yields.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Jie Li, Yuanyu Tian, Yingyun Qiao, Guozhang Chang, Cuiping Wang, Yue Gao, Laishun Yang, Ke Song, Jian Zhang, Shugang Hu, Guangxi Yue
Summary: This study focuses on the synergistic effect of a hydrogen atmosphere and biochar on tar removal and CH4-rich gas production during the pyrolysis-catalytic reforming of biomass. The use of biochar as a catalyst significantly improves the efficiency of tar conversion and the yield of methane, and it can continuously regenerate the catalyst.
Article
Energy & Fuels
Stephen Niksa
Summary: The essential aspects of cellulose devolatilization involve depolymerization reactions, bond rupture probabilities, charring cascade, and Flash Distillation Analogy. Predictions from cel-FC accurately depict the impacts of temperature, heating rate, and pressure on the major products of primary cellulose devolatilization, explaining the variations in oil yields and molecular weight distributions under different conditions.
Article
Chemistry, Analytical
Stephen Niksa
Summary: This study extends the validation of a reaction mechanism for the devolatilization of mineral-free cellulose named cel-FC. The analysis reveals that random depolymerization and chain unzipping play key roles in cellulose devolatilization and oil production rates, with flash distillation mediating the process. The study also shows that ultimate oil yields remain consistent across a wide range of conditions, while oil molecular weight distributions shift towards heavier weights with faster heating rates, hotter temperatures, and lower pressures.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Green & Sustainable Science & Technology
Raissa Aparecida da Silveira Rossi, Janaina Miranda Barbosa, Marcos Antonio de Souza Barrozo, Luiz Gustavo Martins Vieira
Summary: The study investigates the production of bio-oil using solar assisted catalytic hydropyrolysis process. Results show that this technique can achieve higher liquid yields with lower content of oxygenated compounds. There are some differences in the effects of the two different processes, providing important insights for further research into this process.
Article
Energy & Fuels
Fan Xiao, Li Yang, Ben He, Hong Tian, Shan Cheng, Yanshan Yin, Erwei Leng
Summary: Oxidative pyrolysis of biomass is a promising alternative to conventional pyrolysis and plays a crucial role in the degradation process of biomass materials. By using in situ diffuse reflectance infrared Fourier transform technology, the evolution of functional groups in cellulose char during oxidative pyrolysis was studied. The experimental results showed that oxygen has a significant promoting effect on the oxidation of cellulose, leading to decreased thermostability and devolatilization.
Article
Chemistry, Multidisciplinary
Yingyue Teng, Xiaoting Bian, Yinmin Song, Bingzhi Wang, Na Li, Runxia He, Yunfei Wang, Quansheng Liu
Summary: This study investigated the effect of the iron component on the microcrystalline structure transformation properties of lignite during pyrolysis. The results showed that the iron component promoted the generation of CO2, CO, and H2 in the low-temperature stage and inhibited the formation of CO and H2 in the high-temperature stage. The iron component also inhibited the formation of CH4 throughout the pyrolysis process. Moreover, it restricted the spatial arrangement of aromatic rings and inhibited the formation of large aromatic rings (≥6 rings).
Article
Chemistry, Analytical
Sheng-Li Zhang, Feng Wang, Fu-Tian Zhao, Oraleou Sangue Djandja, Pei-Gao Duan, Weihong Yan
Summary: The study found that there is a positive synergistic effect between crop straw and used engine oil during their catalytic hydropyrolysis process, leading to improved oil yield, reduced coke formation, and lower nitrogen and sulfur content. Additionally, co-hydropyrolysis resulted in higher energy recovery compared to hydropyrolysis of crop straw alone.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Multidisciplinary
Stef Ghysels, Luis E. Arteaga-Perez, Adriana Estrada Leon, Tamara Menares, Simon Backx, Sven Mangelinckx, Frederik Ronsse
Summary: In this study, the fast pyrolysis of woody biomass for levoglucosan production was combined with the reductive thermocatalytic valorization of its main side streams. Through catalytic vapor-phase upgrading, high-concentration phenolics can be obtained with a large yield. This work demonstrates the value creation from overlooked side streams of the pyrolysis refinery.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
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)