Article
Chemistry, Physical
Panlei Wang, Huaqing Xie, Jinning Zhang, Lifei Jia, Zhenyu Yu, Rongquan Li
Summary: The thermodynamics of hydrogen production from bio-oil in conventional steam reforming and sorption-enhanced steam reforming methods was investigated. Factors such as reforming temperature, S/C ratio, and operating pressure significantly influence hydrogen yield, with SE-SR showing advantages of higher yield at lower temperatures and carbon suppression compared to C-SR.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Yi-Kai Chih, Wei-Hsin Chen, Siming You, Chun-Han Hsu, Hong -Ping Lin, Salman Raza Naqvi, Veeramuthu Ashokkumar
Summary: This study aims to develop highly-porous Ni-Cu/Al2O3 catalysts for hydrogen production from the steam reforming of methanol. The impacts of selected operating factors on hydrogen productivity are investigated and the optimal conditions are determined. The results show that the prepared catalysts exhibit superior performance and stability compared to those in the literature.
Article
Chemistry, Physical
Hyunjin Ji, Junghun Lee, Eunyeong Choi, Jang-hyeon Cho
Summary: The study found that adding hydrogen peroxide (H2O2) to methanol reforming reactions at low temperatures can increase methanol conversion and hydrogen production, especially when methanol conversion is low. Additionally, the results showed that the addition of H2O2 did not significantly decrease the durability of the catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Guo Li, Andong Zhang, Zhihe Li, Zhen Wan, Tawaf Alishah, Jiaxin Meng
Summary: The steam reforming of aqueous bio-oil is a promising technology for green hydrogen production, and a study found that the enrichment of high-value pyridines components in aqueous bio-oil after reforming hydrogen production reaction could improve its economy. The effects of temperature (700 & DEG;C-900 & DEG;C) and WHSV (10 h-1-30 h-1) on hydrogen production rate and pyridine enrichment rate were investigated, and the highest hydrogen yield of 40.3% was obtained at the initial stage of the reaction at the optimum operating conditions of 850 & DEG;C and a WHSV of 15 h-1. This study proposed a new route for the co-production of pyridines in the catalytic reforming process of aqueous bio-oil, which is beneficial to the complete quantitative utilization of biomass and improves the economics of bio-oil products.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Ion Iliuta, Alex Desgagnes, Ana Yanez Aulestia, Heriberto Pfeiffer, Maria C. Iliuta
Summary: This study proposes a non-isothermal sorption-enhanced bio-oil steam reforming (SEBOSR) process for the production of high-purity hydrogen. The process combines bio-oil steam reforming over a Ni/La2O3-alpha Al2O3 catalyst and in-situ CO2 adsorption over Li2CuO2. Model simulations show that the SEBOSR process can be optimized to achieve longer prebreakthrough stages and higher hydrogen purity. This intensified process allows for the production of highly pure and renewable hydrogen from CO2-neutral biomass.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Bin Zheng, Yingkai Shen, Peng Sun, Ruixiang Liu, Jian Meng, Runze Chang, Tengfei Gao, Yongqi Liu
Summary: Hydrogen production by bio-oil steam reforming is an advanced technology that couples waste heat utilization with increased cleaning ability of the system. The proposed multi-zone steam generator utilizing waste heat can affect hydrogen production efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Karittha Im-orb, Amornchai Arpornwichanop
Summary: A techno-economic assessment was conducted to compare the production of bio-methanol and bio-dimethyl ether (bio-DME) via gasification-MeOH and gasification-DME processes. The analysis found that gasification-MeOH produced a higher amount of valuable product (methanol) but released more CO2, while gasification-DME had a higher biomass conversion efficiency. In terms of economics, due to higher product prices, the gasification-DME process was approximately 7% more economically feasible.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Tong Zhang, Xin-Yuan Tang, Wei-Wei Yang, Xu Ma
Summary: This paper proposes a reflux solar methanol steam reforming reactor (SMSRR) system for efficient solar thermal hydrogen production. A two-dimensional (2D) axisymmetric model is used to compare the comprehensive performance of three different SMSRRs: no reflux tube (SMSRR0), flow from the inside of the reflux tube to the outside (SMSRR1), and flow from the outside of the reflux tube to the inside (SMSRR2). The results show that the reflux SMSRR utilizes the heat of the fluid at the outlet to further provide reaction heat, greatly reducing the outlet temperature and improving the overall performance of the SMORE. By optimizing the diameter of the reflux tube and the operating conditions, the energy conversion rate can be increased by 19.5%, and the temperature distribution coefficients can be increased by 1.89%, while the methanol conversion is increased by 6.43% and the hydrogen yield is increased by 5.96%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Qiong Wu, Deqing Mei, Xingye Qiu, Yancheng Wang
Summary: This study proposes a multilevel series scaled-up methanol steam reforming microreactor to improve the hydrogen production rate. Experimental results show that the developed microreactor can significantly improve the hydrogen production rate and temperature distribution uniformity, indicating a potential application in high hydrogen consumption equipment.
Article
Chemistry, Physical
Tianqing Zheng, Dongjie Zhou, Youji Zhan, Yongchao Xu
Summary: By optimizing the integration design of the self-thermal methanol steam reforming microreactor, the hydrogen production capability can be enhanced, resulting in increased methanol conversion rate and hydrogen yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Bing-Zhen Hsu, Chung-Lun Yu, Subramanian Sakthinathan, Te-Wei Chiu, Bing-Sheng Yu, Chia-Cheng Lin, Liangdong Fan, Yi-Hsuan Lee
Summary: ZnFe2O4 and ZnO-ZnFe2O4 catalysts were prepared using the glycine-nitrate process and characterized using various techniques. The ZnO-ZnFe2O4 catalyst showed the highest H-2 generation rate of 7745 mL STP min(-1) g-cat(-1) at 500 degrees C.
Article
Energy & Fuels
Naiara Garcia-Gomez, Jose Valecillos, Beatriz Valle, Aingeru Remiro, Javier Bilbao, Ana G. Gayubo
Summary: This study investigates the impact of temperature and bio-oil composition on the stability of a catalyst, and finds that the catalyst deactivates rapidly when the external surface is blocked by turbostratic carbon. Removing phenolic compounds from the bio-oil slows down the formation of turbostratic carbon and improves catalyst stability.
Article
Engineering, Multidisciplinary
Ahmed N. M. Nassef, Ahmed Fathy, Mohammad Ali Abdelkareem, A. G. Olabi
Summary: This study aims to improve bio-hydrogen production based on steam reforming using fuzzy modeling and optimization, determining optimal input parameters through experimental simulation and Marine Predators Algorithm, resulting in increased hydrogen production.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Chemistry, Physical
M. Bayat, A. Garmroodi Asil
Summary: Methanol steam reforming is a promising method for producing pure hydrogen, and optimization through LINMAP method can significantly enhance the hydrogen production rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Rui Xie, Jie Sun, Yaolu Shi, Jinjia Wei
Summary: A baffled-type thermochemical reactor (BTR) for high-efficient hydrogen production by methanol steam reforming (MSR) has been proposed and numerically investigated. The study found that the radius of heat-exchanging tube has a significant impact on hydrogen yield (YH2) while the radius of heat-exchanging tube array has little effect. Both the inlet velocity and temperature of heat transfer fluid (HTF) affect the reactor performance. There is an optimal operating curve for each gas hourly space velocity (GHSV) to maximize YH2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
J. Lachen, J. Herguido, J. A. Pena
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Green & Sustainable Science & Technology
J. Lachen, J. Herguido, J. A. Pena
Article
Chemistry, Applied
R. Raso, M. Tovar, J. Lasobras, J. Herguido, I Kumakiri, S. Araki, M. Menendez
Summary: A zeolite membrane reactor can enhance the reaction rate and conversion efficiency in the hydrogenation of CO2 to methanol, with zeolite A showing the best water/hydrogen separation factor. Preliminary experiments indicate that the methanol yield is significantly improved when using a membrane reactor compared to a traditional reactor, sometimes even surpassing the thermodynamic equilibrium limit in a conventional reactor.
Article
Chemistry, Applied
D. Zapater, J. Lasobras, J. Soler, J. Herguido, M. Menendez
Summary: Deactivation of SAPO-34 catalyst is a common issue in the methanol to olefins (MTO) process. Adding water along with methanol can reduce deactivation, but not fully avoid it. To address this, a reactor where reaction and regeneration happen simultaneously is proposed, with a comparison between conventional and two zone fluidized bed reactors presented in this work.
Article
Materials Science, Multidisciplinary
P. J. Lloreda-Jurado, E. M. Perez-Soriano, A. Paul, J. Herguido, J. A. Pena, R. Sepulveda
MATERIALS SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Environmental
D. Zambrano, J. Soler, J. Herguido, M. Menendez
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Chemistry, Physical
Bianca Trifan, Javier Lasobras, Jaime Soler, Javier Herguido, Miguel Menendez
Summary: Renewable methanol, using CO2 and hydrogen from renewable energy sources, was proposed as a solution to close the CO2 loop. Traditional high-pressure methanol synthesis using CuO/ZnO/Al2O3 catalyst was modified to work at lower pressure with high selectivity, resulting in the synthesis of a palladium-doped catalyst with 64% selectivity at mild conditions.
Article
Biochemistry & Molecular Biology
Ester Juarez, Javier Lasobras, Jaime Soler, Javier Herguido, Miguel Menendez
Summary: A new silicone-ceramic composite membrane has been synthesized and characterized for its ability to selectively remove water from a mixture of hydrogen, CO2, and water at typical temperatures for methanol synthesis. The membrane can achieve selective permeation of water under harsh conditions, making it a potential candidate for use in membrane reactors where water is a product and yield is limited by thermodynamic equilibrium.
Article
Chemistry, Physical
Andres Sanz-Martinez, Javier Lasobras, Jaime Soler, Javier Herguido, Miguel Menendez
Summary: In this study, catalysts suitable for MTG processes in a fluidized bed reactor were prepared and characterized. Among the catalysts tested, the one containing boehmite as a binder showed the best performance in terms of mechanical strength, yield to aromatics, and yield to durene.
Article
Energy & Fuels
P. Aragues-Aldea, A. Sanz-Martinez, P. Duran, E. Frances, J. A. Pena, J. Herguido
Summary: This study successfully demonstrated the effect of distributed feeding on the methanation of CO2, improving the selectivity towards CH4 and enhancing the overall process performance.
Article
Chemistry, Physical
Andres Sanz-Martinez, Paul Duran, Victor D. Mercader, Eva Frances, Jose Angel Pena, Javier Herguido
Summary: This study focused on the concept of 'biogas upgrading' to increase CH4 levels in sweetened biogas to those of synthetic natural gas. The behavior of three lab-made catalysts in a CO2 methanation reaction was tested, showing good catalytic performance and high CH4 selectivity. Addition of CH4 did not significantly alter the reaction mechanism, allowing for potential utilization of off-peak H-2 for maximizing CH4 yield.
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)