Article
Energy & Fuels
Zulfiqar Ali Bhatti, Sania Bhatti, Sikandar Ali Abbasi, Abdul Sattar Jatoi, Abdul Qadeer Laghari, Ghulamullah Maitlo
Summary: This study investigates the impact of steam glycerol reformation on hydrogen production through thermodynamic analysis. The results show that changing temperature, pressure, and water/glycerol ratio can improve hydrogen production.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Physical
Chien-Hung Chen, Ching-Tsung Yu, Wen-Hui Chen
Summary: Optimization of steam methane reforming reaction through CO2 sorption enhancement resulted in high-purity hydrogen production suitable for proton-exchange membrane fuel cells, demonstrating significant differences in CH4 conversion between SMR and SESMR.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Analytical
Heidi Isabel Villafan-Vidales, Gartzen Lopez, Laura Santamaria, Maite Artetxe, Martin Olazar
Summary: This study investigated the thermodynamics of oxidative steam-reforming of pyrolysis volatile streams and evaluated the combined effects of temperature, steam to feedstock ratio, and oxygen content on the reaction. The steam partial pressure was found to be the most influential parameter, impacting hydrogen production and energy requirements significantly.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Energy & Fuels
Shuliu Yang, Haoran Sun, Shiliang Yang, Jianhang Hu, Hua Wang
Summary: This study numerically investigates the sorption-enhanced glycerol steam reforming process using the multiphase particle-in-cell model within the Eulerian-Lagrangian framework. The particle-scale evaluations and gas thermal properties are comprehensively presented. The results reveal the preferential distribution of CaO particles in the bottom zone of the bed due to size and density-induced segregation. The findings have profound significance for understanding complex gas-solid reacting flow and optimizing the sorption-enhanced hydrogen production system.
Article
Chemistry, Physical
D. H. D. Rocha, T. A. Z. de Souza, C. J. R. Coronado, J. L. Silveira, R. J. Silva
Summary: The study found that by recycling the residual gas with high concentration of water and CO2, the glycerol reforming capacity can be maximized while increasing the system's overall exergy efficiency. This process was evaluated in three different scenarios regarding reform gas processing from technical and environmental perspectives.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Pingchao Zeng, Binlin Dou, Hua Zhang, Kai Wu, Longfei Zhao, Chuanqi Luo, Haisheng Chen, Yujie Xu
Summary: Chemical looping steam reforming (CLSR) using oxygen carriers (OCs) has been demonstrated as an efficient technology for hydrogen production. In this study, NiO/MgAl2O4 OCs were employed for hydrogen production via CLSR with and without CaO sorbent for in-situ CO2 removal (SE-CLSR). The optimal temperature for hydrogen production was found to be 650°C, and the 1g 20NiO/MgAl2O4 catalysts showed high hydrogen selectivity and minimal 'dead time'. High purity hydrogen was successfully obtained via CLSR coupled with CaO sorbent, and stable hydrogen production was achieved with modified stability SE-CLSR experiments.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Review
Chemistry, Physical
Yinxiang Wang, Muhammad Zaki Memon, Majid Ali Seelro, Weng Fu, Yuan Gao, Yingchao Dong, Guozhao Ji
Summary: This paper briefly discusses the advantages and disadvantages of different types of CO2 sorbents, focusing on how to improve their adsorption performance. Selecting the appropriate sorbent is crucial for producing high-purity hydrogen gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
M. Salome Macedo, M. A. Soria, Luis M. Madeira
Summary: In recent years, glycerol steam reforming (GSR) has been a focus of interest for the production of green hydrogen, with researchers focusing on GSR thermodynamics, catalyst development, reaction kinetics and mechanisms, reactor models, and innovative reactor configurations.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Energy & Fuels
Yunzhu Wang, Yi Zhao, Songshan Zhu, Jichang Lu, Sufang He, Huihui Lu, Di Song, Yongming Luo
Summary: Shape-specific CeO2 nanocrystals (spheres, rods, cubes and nanoparticles) were synthesized and used as support for Ni/CeO2 catalysts for glycerol steam reforming. The morphology of the CeO2 support affected the metal-support interaction and the specific surface area of nickel and oxygen vacancy concentration, thereby influencing the catalytic performance. Ni/CeO2-S with mainly exposed (111) type planes showed the strongest metal-support interaction, resulting in high glycerol conversion and hydrogen production. In contrast, Ni/CeO2-NR and Ni/CeO2-NC with lower exposure areas and oxygen vacancy concentrations showed poorer catalytic activity. The study of the Ni-CeO2 interaction can provide valuable insights for designing efficient GSR catalysts.
Article
Engineering, Chemical
Oscar Ovalle-Encinia, Han-Chun Wu, Tianjia Chen, Jerry Y. S. Lin
Summary: Experimental and simulation results demonstrate the feasibility of hydrogen production with simultaneous CO2 removal through steam reforming of methane in a CO2-perm-selective membrane reactor. The mathematical model accurately describes the process, showing that adjusting permeation number, Damkohler number, reaction pressure, and sweep side conditions can enhance H2 yield and CO2 recovery.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Zhiyuan Li, Weiquan Cai, Chengxiong Dang
Summary: This study reports a general template-based approach using carbon microspheres and alkali modification to synthesize highly effective bi-functional catalyst, which exhibits excellent stability and high performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Eliane Dahdah, Jane Estephane, Cedric Gennequin, Bilal El Khoury, Antoine Aboukais, Edmond Abi-Aad, Samer Aouad
Summary: The physico-chemical properties of Ni, Ru, Ru-Ni monoclinic ZrO2 catalysts were studied and their catalytic activities in the glycerol steam reforming reaction were compared. Different characterization techniques were used to analyze the catalysts. The results showed that the combination of Ru and Ni on zirconia led to improved catalytic performance and stability.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Engineering, Chemical
Hanke Li, Chengxiong Dang, Yuhang Li, Guangxing Yang, Yonghai Cao, Hongjuan Wang, Feng Peng, Hao Yu
Summary: The article introduces a method of process integration using multifunctional materials, significantly improving hydrogen production efficiency by pre-reducing CCO to catalysts and sorbents through a chemical method.
Article
Chemistry, Applied
Yunzhu Wang, Songshan Zhu, Jichang Lu, Sufang He, Huihui Lu, Di Song, Dingkai Chen, Yongming Luo
Summary: Nickel-based catalysts with shape-specific CeO2 nanocrystals were synthesized with adjustable impregnation solvents. The catalyst with hierarchical structure and ethanol impregnation solvent showed the strongest metal-support interaction, leading to high glycerol conversion and H2 yield in glycerol steam reforming. The study of the modulation role of Ni-CeO2 interaction on catalytic behavior provides valuable guidelines for designing efficient catalysts for GSR.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Surendar Moogi, Lingaiah Nakka, S. Sai Prasad Potharaju, Ashfaq Ahmed, Abid Farooq, Sang-Chul Jung, Gwang Hoon Rhee, Young-Kwon Park
Summary: Different cobalt-based mixed oxide catalysts were synthesized and tested for hydrogen production from glycerol steam reforming, with the 5Cu20CM catalyst showing the best performance attributed to its small particle size, high dispersion, and large surface area.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Lalitha Gnanasekaran, A. K. Priya, F. Gracia
Summary: This study focuses on the synthesis of novel 3D ZnO/SnO2 nanocomposites using green methods for the treatment of chlorophenol effluent. The composites prepared with orange peel extract showed enhanced photocatalytic degradation of chlorophenol under visible light, highlighting the potential applications of visible light enhancement in wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Energy & Fuels
M. Romero-Saez, R. Suresh, N. Benito, Saravanan Rajendran, F. Gracia, Carlos Navas-Cardenas, A. K. Priya, Matias Soto-Moscoso
Summary: By comparing the CO oxidation performance of mesoporous CeO2 nanoleaves with commercial CeO2 bulk powder, it was found that the synthesized nanoleaves showed superior performance, possibly due to the presence of cubic structure nanoleaves and line displacements, which favored more electron active sites.
Article
Materials Science, Multidisciplinary
Lalitha Gnanasekaran, Saravanan Rajendran, P. Senthil Kumar, A. K. Priya, F. Gracia, Mohamed A. Habila, Karunamoorthy Saravanakumar
Summary: This work introduces composite catalysts of titanium dioxide (TiO2) and tin dioxide (SnO2) for the visible light degradation of methyl orange (MO) dye, and carries out experiments on its effectiveness against Staphylococcus aureus bacteria.
Article
Materials Science, Multidisciplinary
Lalitha Gnanasekaran, A. A. Jalil, Senthil Kumar, Saravanan Rajendran, F. Gracia, Matias Soto-Moscoso, Mohamed A. Habila, Karunamoorthy Saravanakumar
Summary: This study reports the synthesis of flower-shaped p-n heterojunction NiO/CeO2 and investigates their properties and photocatalytic mechanism. The degradation efficiency of the synthesized catalysts for organic pollutant methyl orange (MO) is also discussed. The results show that this material exhibits outstanding activity and stability, making it a promising candidate for future applications.
Article
Biotechnology & Applied Microbiology
Devaraj Manoj, Saravanan Rajendran, F. Gracia, M. Naushad, Madhappan Santhamoorthy, Matias Soto-Moscoso, M. A. Gracia-Pinilla
Summary: Vitamins are essential for the body's proper functioning, but they must be obtained through food intake. In this study, a mesoporous structure of titanium dioxide with doped zinc oxide nanocrystals on its surface was developed for the simultaneous determination of vitamin B and vitamin C. The mesoporous structure and zinc oxide nanocrystals enhance the diffusion and electron transfer of vitamins, resulting in significantly enhanced electrochemical signal response.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Adriana Blanco, Josefina Caroca, Rocio Tamayo, Marcos Flores, Manuel Romero-Saez, Rodrigo Espinoza-Gonzalez, Francisco Gracia
Summary: Nickel-doped CaTiO3 (Ni@CTO) perovskites prepared by sol-gel synthesis showed high catalytic activity and selectivity in the CO2 methanation reaction. The catalysts with particle sizes below 10 nm exhibited the highest activity. The doped catalysts exhibited activity at lower temperatures, possibly due to enhanced CO2 adsorption sites and higher specific surface area resulting from the formation of oxygen vacancies in the perovskite. The 10Ni@CTO catalyst demonstrated high stability over 40 hours of reaction.
Article
Engineering, Chemical
Daniela Gormaz-Cuevas, Catalina Quinones-Lopez, Fernando Arenas-Araya, Felipe A. Diaz-Alvarado
Summary: Water resource management is crucial in the face of global warming-induced water shortages. This study compares four strategies to simplify the nonlinear constraints in water network optimization and demonstrates the effectiveness of a two-stage strategy using a case study in Santiago, Chile.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
J. Vergara-Zambrano, W. Kracht, Felipe A. Diaz-Alvarado
Summary: This paper proposes a methodology for designing a solar-biogas hybrid renewable energy system considering the integration of renewable energy's variability and its intermittency nature. The results indicate that solar energy and biogas are attractive options to supply the electrical requirements of a copper mining process, but a deeper environmental evaluation of the system is needed.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Materials Science, Multidisciplinary
C. J. Aguilar, E. Mosquera, F. Gracia, J. E. Diosa, J. E. Rodriguez-Paez
Summary: Porous nanostructures of PrMnO3 were synthesized using the sol-gel method with different solvents, ethanol and ethylene glycol. The choice of solvent was found to significantly affect the properties of PrMnO3, and the magnetic behavior of the nanostructures also varied with temperature.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Engineering, Chemical
Fernando Arenas-Araya, Javiera Vergara-Zambrano, Felipe A. Diaz-Alvarado
Summary: This paper proposes an iterative algorithm to calculate the stability region of parameters in mixed-integer non-linear programing (MINLP) problems. By making several modifications, the algorithm is able to search for critical parameters of the solution more quickly, and it is applied in the context of water network design.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Environmental Sciences
Devaraj Manoj, Saravanan Rajendran, Mu. Naushad, Madhappan Santhamoorthy, F. Gracia, Matias Soto Moscoso, M. A. Gracia-Pinilla
Summary: In this study, mesoporous copper oxide (CuO) nanocrystals decorated on TiO2 nanostructures were successfully synthesized to form p-n heterojunction nanocomposites. The resulting CuO-TiO2 nanocomposite showed good electrochemical performance on modified GC electrode, enabling efficient oxidation of catechol with wide linear range and excellent sensing properties, capable of detecting catechol in real samples like lake and river water.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Devaraj Manoj, Saravanan Rajendran, F. Gracia, Sabah Ansar, Madhappan Santhamoorthy, Matias Soto-Moscoso, M. A. Gracia-Pinilla
Summary: The capacity to generate a constant signal response from an enzyme on an electrode surface has been a fascinating topic of research for the past three decades. The immobilization of dual enzymes on the electrode surface using mesoporous materials allows for high loading of enzymes and provides a protective environment, resulting in long-term stability. The utilization of a redox mediator in second-generation biosensing of hydrogen peroxide improves the selectivity and sensitivity of the sensor.
ENVIRONMENTAL RESEARCH
(2022)
Article
Energy & Fuels
Saravanan Rajendran, Lalitha Gnanasekaran, Tuan K. A. Hoang, D. E. Diaz-Droguett, F. Gracia, M. A. Gracia-Pinilla
Summary: This study synthesized a TiO2@SnO2 catalyst through the integration of sol-gel and thermal decomposition methods, which exhibited significantly enhanced hydrogen adsorption. The composite demonstrated a mesoporous nanostructure with hindered pores by SnO2. The oxidation states of TiO2 also played a crucial role in hydrogen adsorption.
Review
Chemistry, Physical
Isabella Boese-Cortes, Felipe A. Diaz-Alvarado, Ana L. Prieto
Summary: This review focuses on modeling a submerged membrane bioreactor, known as the whole-cell biocatalytic membrane reactor (BMR), for hydrogen production from renewable sources. The technology of BMR is presented as an alternative for improved gas separation, and the fundamental principles are comprehensively overviewed. The article discusses different models and strategies for representing the phenomenology involved in BMR, including kinetic expressions for hydrogen formation and the gaps in existing models for wastewater treatment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Devaraj Manoj, Lalitha Gnanasekaran, Saravanan Rajendran, A. A. Jalil, Mohammad Nahid Siddiqui, F. Gracia, Matias Soto-Moscoso
Summary: The subject of water contamination and its impact on society and humans has been a topic of discussion for several decades. Phenolic compounds are widely found in water sources and it is crucial to determine their toxicity in natural and drinking water due to their harmful effects on humans. This study focuses on the development of an effective electrochemical sensor using a mesoporous structure of Fe3O4-TiO2 decorated on a glassy carbon electrode to detect catechol. The resulting Fe3O4-TiO2 based nanocomposite exhibited a mesoporous structure with highly active magnetite nanoparticles, showing a significant increase in the electrochemical response compared to pure TiO2.
ENVIRONMENTAL RESEARCH
(2023)