Article
Engineering, Environmental
Wei Su, Ping Liu, Changqing Cai, Hongzhi Ma, Bo Jiang, Yi Xing, Yunyi Liang, Liping Cai, Changlei Xia, Quyet Van Le, Christian Sonne, Su Shiung Lam
Summary: The research utilized supercritical water gasification technology to convert Sedum plumbizincicola into hydrogen gas and immobilize heavy metals in biochar. High temperatures promoted hydrogen production, while biochar facilitated heavy metal adsorption and conversion into stable forms.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Cui Wang, Mingming Du, Huifang Feng, Hui Jin
Summary: Supercritical water gasification (SCWG) technology efficiently utilizes biomass, but the gasification mechanism of real biomass is complex. The study found that complete gasification of biomass can be achieved at relatively high temperatures. Additionally, it was discovered that SCWG enables co-production of hydrogen and biochar. Furthermore, the study explored the evolution of pore structure of biochar, revealing that SCWG produces abundant pore structure.
Article
Chemistry, Analytical
Qing Wang, Xu Zhang, Da Cui, Jingru Bai, Zhichao Wang, Faxing Xu, Zhenye Wang
Summary: Supercritical water gasification (SCWG) with biomass is a process that converts biomass feedstock into hydrogen-rich syngas through thermal decomposition and hydrolysis. This review discusses the relationship between cellulose, hemicellulose, lignin, and hydrogen production, as well as the effects of reaction conditions and catalysts on SCWG. The results highlight the significant impact of temperature and catalysts on SCWG, while other operating conditions play a secondary role. However, the SCWG mechanism of real lignocellulosic biomass and the interaction relationship of its components still require further study. Furthermore, the development of stable and efficient catalysts is crucial for the advancement of this technology.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Review
Engineering, Environmental
Chai Siah Lee, Alex V. Conradie, Edward Lester
Summary: Supercritical water gasification is a process for converting wet biomass into syngas without the need for energy-intensive pre-drying, aiming to obtain syngas rich in hydrogen. Studies have shifted from using model compounds to real biomass feedstock, investigating factors influencing hydrogen yields and the relationship between biomass components and hydrogen yields.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Haoyang Li, Mingyuan Zhang, Haoyu Wang, Xue Han, Yimin Zeng, Chunbao Charles Xu
Summary: This study compares batch and continuous supercritical water gasification processes for green hydrogen production from biomass and provides insights for optimizing processes, evaluating feasibility, and supporting techno-economic analyses.
BIORESOURCE TECHNOLOGY
(2024)
Article
Chemistry, Physical
Elif Demirel, Can Erkey, Nezihe Ayas
Summary: Researchers found that the KOH catalyst plays a positive role in promoting biomass decomposition, increasing gas products, and facilitating the water-gas shift reaction (WGSR) at high temperatures.
JOURNAL OF SUPERCRITICAL FLUIDS
(2021)
Article
Thermodynamics
Jialing Xu, Siqi Rong, Jingli Sun, Zhiyong Peng, Hui Jin, Liejin Guo, Xiang Zhang, Teng Zhou
Summary: A novel mathematical modeling and optimization approach is applied to design optimal tubular reactors for the supercritical water gasification (SCWG) of biomass. The study shows that non-isothermal reactors with three-stage zigzag-like temperature profiles are preferred for hydrogen production, and the optimal design can significantly increase the hydrogen yield.
Article
Chemistry, Physical
Ali Karimi, Negar Kazemi, Omid Tavakoli, Azadeh Ebrahimian Pirbazari
Summary: This study investigated the supercritical water gasification of black liquor for hydrogen production, finding that the hydrogen yield could be enhanced by optimizing temperature and reaction time. The addition of heterogeneous catalysts and other biomass like wood residue and formic acid further improved the hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Dilek Selvi Gokkaya, Gokcen Akgul, Mehmet Saglam, Mithat Yuksel, Levent Ballice
Summary: This study investigated the effects of catalyst concentration and temperature on product distribution in supercritical water gasification, and demonstrated that group 1A carbonates can increase the yields of H2 and CH4. The results support the development of reaction conditions using effective catalysts to address global bioenergy shortage and effective waste management in the industry.
JOURNAL OF SUPERCRITICAL FLUIDS
(2021)
Article
Green & Sustainable Science & Technology
Noah Luciano Taufer, Vittoria Benedetti, Matteo Pecchi, Yukihiko Matsumura, Marco Baratieri
Summary: This study investigated a combined process of hydrothermal carbonization (HTC) and supercritical water gasification (SCWG) to fully utilize digestate from anaerobic digestion. The results showed that increasing SCWG temperature led to higher carbon yield and hydrogen content in the gas phase, while increasing residence time resulted in a decrease in carbon yield in the gas phase. Increasing feedstock concentration led to a higher gas generation rate.
Article
Thermodynamics
Cui Wang, Linfeng Li, Yunan Chen, Zhiwei Ge, Hui Jin
Summary: In this study, gasification experiments of wheat straw in supercritical water were conducted to analyze the gasification properties. A kinetic model of wheat straw was established to guide the acceleration of gasification. The results showed that increasing reaction time enhanced gasification significantly, while temperature became the limiting factor for hydrogen yield.
Article
Engineering, Chemical
Julian Dutzi, Nikolaos Boukis, Jorg Sauer
Summary: The influence of process water recycling in Supercritical Water Gasification of dry biomasses was studied. Dilution of dry biomass with water is required for supercritical water gasification. Recycling of process effluent is attractive due to cost-intensive wastewater treatment. Salt separation is necessary to prevent accumulation of salts in the effluents. Gasification of Reed Canary Grass and grapevines did not affect the composition of the product gas. Carbon efficiency decreased by 4% when wastewater was used for biomass dilution. Increase in organic carbon and potassium content was observed in the reactor effluent after gasification with recycled process effluent. Careful monitoring and adjustment of potassium hydroxide addition is required based on the reactor effluent's potassium content. Insufficient salt separation leads to formation of solid deposits in the reaction system.
Article
Chemistry, Physical
Cui Wang, Chao Zhu, Jianbing Huang, Hui Jin, Xiaoyan Lian
Summary: This paper discusses the degradation pathway of xylose in supercritical water and finds that phenols and arenes are difficult to be gasified while furans, organic acids, ketones, and alcohols can be easily gasified. Comparing with glucose and guaiacol, xylose is more easily gasified. The degradation of phenols and arenes is the key step in the supercritical water gasification of biomass model compounds.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Cui Wang, Hui Jin
Summary: Supercritical water gasification (SCWG) technology is considered a potential solution for biomass waste utilization. This study developed a one-dimensional dynamic model and established a kinetic model for soybean stem to analyze the reactor performance. The sensitivity analysis showed that H2 mole fraction was most affected by the inlet temperature. The dynamic simulation results demonstrated that the gasifier responds quickly to concentration changes.
Article
Chemistry, Physical
Pedro F. dos Santos, Camila G. Pereira
Summary: A study investigated the use of Supercritical Water Gasification (SCWG) in biomass conversion through a mathematical model, which was able to represent experimental data well. Evaluations were done on the effects of temperature, pressure, and different biomass sources. Predictions showed varying concentrations of H-2 in different scenarios, with values around 68%, 67%, and 66% for specific biomass sources.
JOURNAL OF SUPERCRITICAL FLUIDS
(2021)
Article
Materials Science, Paper & Wood
Mohammad Salimi, Behnam Nejati, Ali Karimi, Ahmad Tavasoli
Article
Energy & Fuels
Mohammad Salmi, Salar Balou, Komeil Kohansal, Khosrow Babaei, Ahmad Tavasoli, Mahmoud Andache
Article
Thermodynamics
Omid Norouzi, Farid Safari, Sajedeh Jafarian, Ahmad Tavasoli, Ali Karimi
ENERGY CONVERSION AND MANAGEMENT
(2017)
Article
Chemistry, Physical
Farid Safari, Nader Javani, Zehra Yumurtaci
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Chemistry, Physical
Mohammad Salimi, Ahmad Tavasoli, Salar Balou, Havva Hashemi, Komeil Kohansal
APPLIED CATALYSIS B-ENVIRONMENTAL
(2018)
Article
Thermodynamics
Ahmad Tavasoli, Mostafa Aslan, Mohammad Salimi, Salar Balou, S. M. Pirbazari, Havva Hashemi, Komeil Kohansal
ENERGY CONVERSION AND MANAGEMENT
(2018)
Article
Thermodynamics
Farid Safari, Ibrahim Dincer
ENERGY CONVERSION AND MANAGEMENT
(2018)
Article
Chemistry, Physical
Farid Safari, Ibrahim Dincer
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Review
Thermodynamics
Farid Safari, Ibrahim Dincer
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Chemistry, Applied
Mohammad Salimi, Ahmad Tavasoli, Lasse Rosendahl
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Green & Sustainable Science & Technology
Mohammad Salimi, Havva Hashemi, Muhammad Salman Haider, Lasse Aistrup Rosendahl
Summary: Recent environmental regulations have prompted refiners to reduce NOx emissions from marine transportation fuels. In this study, the hydrodenitrogenation of Iranian Vacuum Bottoms (IVB) for marine applications was evaluated for the first time using a commercial NiMo catalyst. Results showed that high temperature and pressure conditions were optimal for removing nitrogen impurities from the highly aromatic IVB, shedding light on the process chemistry using thermodynamic and kinetic backgrounds.
ENERGY ECOLOGY AND ENVIRONMENT
(2021)
Article
Environmental Sciences
S. Barzegar, S. Hamidi, H. Hashemi, M. Salimi
Summary: Despite methylene blue's wide industrial applications, recent academic focus has shifted towards its detrimental impact on humans and the environment. This study investigates the impact of different preparation methods on the dye removal efficiency of gamma-Al2O3 and canola-derived activated carbon adsorbents, with reverse microemulsion showing the best performance. The research also highlights the critical role of charge/surface ratio in ionic dye adsorptions using nanoparticles.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Reza Gholami Moqadam, Ahmad Tavasoli, Mohammad Salimi
CATALYSIS IN INDUSTRY
(2019)
Article
Chemistry, Multidisciplinary
Farid Safari, Ahmad Tavasoli, Abtin Ataei
INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY
(2017)