Article
Chemistry, Applied
Valentina Cechetto, Luca Di Felice, Jose A. Medrano, Camel Makhloufi, Jon Zuniga, Fausto Gallucci
Summary: The membrane reactor proposed in this work allows for efficient recovery of hydrogen stored in ammonia, achieving high-purity hydrogen separation and ammonia decomposition simultaneously. Experimental results demonstrate that the introduction of a membrane in a conventional reactor can enhance performance and achieve high conversion rates for ammonia at sufficiently high temperatures.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Valentina Cechetto, Luca Di Felice, Rocio Gutierrez Martinez, Alba Arratibel Plazaola, Fausto Gallucci
Summary: This work presents two alternatives for increasing the purity of hydrogen produced in a membrane reactor. The experimental results demonstrate that ultra-pure hydrogen can be produced by either increasing the thickness of the membrane selective layer or using a small purification unit in the permeate of the membranes. Additionally, the use of an adsorption bed downstream the membrane reactor is a cheaper solution that can achieve ultra-pure hydrogen with higher reactor pressures, lower temperatures, and thinner membranes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
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
Engineering, Environmental
Akram S. Ghanem, Fangyi Liang, Mengke Liu, Heqing Jiang, Arafat Toghan
Summary: In this study, a cobalt-free Pr0.6Sr0.4Fe0.9Al0.1O3 - δ (PSFA) catalytic membrane reactor (CMR) with an asymmetrical configuration was prepared for hydrogen production from water splitting and coke oven gas (COG) oxidation. The asymmetric PSFA CMR achieved a high H2 production rate of 9.8 mL min-1 cm-2 when coated with Ni/Ce0.9Pr0.1O2 catalytic porous layers at 940 degrees C. Long-term operation of the asymmetric PSFA CMR for 250 hours under a strong reducing atmosphere containing H2S and CO2 impurities demonstrated its stability and corrosion resistance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Green & Sustainable Science & Technology
Xuesong Yang, Shuai Wang, Yurong He
Summary: This paper reviews the development and challenges of catalytic reforming technology for hydrogen production using a membrane-assisted fluidized bed, summarizes influencing factors of membrane separation and features of a fluidized bed membrane reactor, and introduces the application of coupling technologies.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Nuclear Science & Technology
Karol Kowal, Mina Torabi
Summary: This article addresses the issue of risk analysis for new nuclear facilities with continuously operated safety-related systems. A non-standard approach to system modeling was applied, and the Vessel Cooling System of the HTTR was analyzed in terms of reliability and availability. The results are crucial for the safety and profitability of the HTTR-based electricity hydrogen cogeneration plant. The high reliability of the VCS under emergency conditions has been confirmed, contributing to the probabilistic safety assessment.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Chemistry, Physical
Mukesh Upadhyay, Hyunjun Lee, Ayeon Kim, Sang-hun Lee, Hankwon Lim
Summary: The study utilized a three-dimensional computational fluid dynamic (CFD) model of a membrane reactor to investigate the performance of methane steam reforming, successfully capturing experimentally observed trends. The influence of various operating parameters on overall performance was discussed, and optimal operation windows were identified.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jun-Yi Wang, Yen-Hsun Chi, Jin-Hua Huang
Summary: Sequential addition of hydrazine in an EDTA-free bath resulted in the fabrication of high-performance composite Pd membranes with improved selectivity and cycling stability compared to membranes made using EDTA-contained bath.
Article
Environmental Studies
Vikram Mittal, Rajesh Shah, Nabill Huq
Summary: Despite coal being phased out in electricity production due to environmental concerns, its vast reserves and established infrastructure make it a potential candidate for conversion into transportation fuel or a substitute for methane in hydrogen production.
ENERGY & ENVIRONMENT
(2022)
Article
Chemistry, Physical
Vasan Sivalingam, Vafa Ahmadi, Omodara Babafemi, Carlos Dinamarca
Summary: This study conducted a series of experiments to test the integration of syngas fermentation into a single-cell microbial electrosynthesis process, aiming to improve gas-liquid mass transfer. The study was divided into three phases, with the second phase demonstrating higher gas consumption and acetic acid production.
Article
Biochemistry & Molecular Biology
Nikita Eremeev, Alexey Krasnov, Yuliya Bespalko, Ludmilla Bobrova, Oleg Smorygo, Vladislav Sadykov
Summary: This study focuses on the combination of ethanol steam reforming and hydrogen separation using a lab-scale catalytic membrane reactor (CMR), showing that the use of a monolithic catalyst and asymmetric supported membrane can increase hydrogen permeation efficiency. Operating parameters such as temperature, molar ratio of water/ethanol, and reagent concentration play important roles in determining the effectiveness of the reaction-separation process in the CMR.
Article
Engineering, Environmental
Seung Jae Son, Hyeon Jin Lee, Seong Kyun Kim, Jong-Ho Lee, Hee Jung Park, Jong Hoon Joo
Summary: In this study, an oxygen-permeable membrane reactor capable of high-performance water splitting and simultaneous methane conversion was reported. The study showed that coupling water splitting and partial oxidation of methane is possible even below 800 degrees C using Ruddlesden-Popper oxide and a Ni/perovskite/fluorite composite. The optimized membrane composition ensured high ionic conductivity and stability, leading to stable hydrogen and syngas production.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Richa Sharma, Amit Kumar, Rajesh K. Upadhyay
Summary: Membrane reactors have been found to alleviate hydrogen losses by improving design, with packed bed multi-pass membrane reactor being identified as the optimal design for achieving high hydrogen recovery. This design also shows improvement in hydrogen recovery in fluidized bed operations, opening up opportunities for future research.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
S. O. Dorofeenko, E. V. Polianczyk
Summary: Theoretical consideration of air-steam gasification of pulverized coal in a moving bed updraft reactor with a counterflow of solid granular heat carrier was discussed, aiming at achieving highly efficient gasification conversion with no char in the products by determining the parametric domain for major control parameters. The potential optimization method proposed for a given coal composition, utilizing excess heat accumulated with the heat carrier to improve energy efficiency, offers a promising way to combine the advantages of different gasification methods.
Article
Engineering, Chemical
Xuehua Ruan, Wenbo Huo, Jiaming Wang, Minggang Guo, Wenji Zheng, Yun Zou, Aibin Huang, Jianxiang Shou, Gaohong He
Summary: The study successfully improved the low H-2 recovery ratio and high purification cost issues in coal-based H-2 generation by utilizing H-2-selective and CO2-selective membrane units. Through the combination and replacement of different units, costs can be significantly reduced and hydrogen production efficiency can be increased.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Thermodynamics
A. M. De Pasquale, A. Giostri, M. C. Romano, P. Chiesa, T. Demeco, S. Tani
Article
Energy & Fuels
Schalk Cloete, Antonio Giuffrida, Matteo Romano, Paolo Chiesa, Mehdi Pishahang, Yngve Larring
Article
Chemistry, Physical
Silvia Lasala, Paolo Chiesa, Romain Privat, Jean-Noel Jaubert
JOURNAL OF SUPERCRITICAL FLUIDS
(2018)
Article
Green & Sustainable Science & Technology
Schalk Cloete, Andrew Tobiesen, John Morud, Matteo Romano, Paolo Chiesa, Antonio Giuffrida, Yngve Larring
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2018)
Article
Thermodynamics
Stefano Angelo Gornati, Daniele Di Bona, Paolo Chiesa
FLUID PHASE EQUILIBRIA
(2019)
Article
Thermodynamics
G. Di Marcoberardino, C. M. Invernizzi, P. Iora, A. Ayub, D. Di Bona, P. Chiesa, M. Binotti, G. Manzolini
APPLIED THERMAL ENGINEERING
(2020)
Article
Biochemistry & Molecular Biology
Luca Mastropasqua, Francesca Drago, Paolo Chiesa, Antonio Giuffrida
Article
Thermodynamics
Szabolcs Szima, Carlos Arnaiz del Pozo, Schalk Cloete, Paolo Chiesa, Angel Jimenez Alvaro, Ana-Maria Cormos, Shahriar Amini
Summary: This paper presents a techno-economic assessment of flexible power and hydrogen production from VRE, using gas switching combustion and membrane assisted water gas shift technologies. The study shows that these advanced plants can provide a higher annual rate of return compared to traditional benchmark plants during times of abundant wind and sun, demonstrating their promise for balancing VRE.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Mechanical
Roberto Scaccabarozzi, Emanuele Martelli, Matteo Pini, Carlo Maria De Servi, Paolo Chiesa, Manuele Gatti
Summary: This paper presents a mean-line model for the preliminary design of multistage axial turbines with blade cooling. The model provides an estimate of turbine efficiency by computing the stage-by-stage design and cooling requirement. The study reveals that cooled sCO2 turbines are not suitable for a repeated stage configuration, film cooling is less effective compared to conventional gas turbines, and increasing the number of stages and rotational speeds can improve efficiency.
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Mechanical
Gabriele Pio Risimini, Matteo Martinelli, Paolo Chiesa, Emanuele Martelli
Summary: This paper explores the efficiency of semi-closed oxy-combustion combined cycle (SCOC-CC) with advanced blade materials for carbon capture and storage from natural gas. The results show that using state-of-the-art superalloys can achieve 54% net electric efficiency with a 96% carbon capture rate, while ceramic matrix composites (CMC) blades can boost the efficiency up to 60%. The critical factors are the high temperature gradients across the blade coatings (thermal barrier coating (TBC) for superalloy, environmental barrier coating (EBC) for CMC) and the blade thickness caused by the large heat flux exchanged between hot gases and cooling flows.
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
(2023)
Article
Thermodynamics
G. Di Marcoberardino, E. Morosini, D. Di Bona, P. Chiesa, C. Invernizzi, P. Iora, G. Manzolini
Summary: Supercritical CO2 cycles are a promising alternative to steam cycles in concentrated solar power plants, offering increased efficiency and reduced costs. This study experimentally characterizes a CO2 blend with the addition of C6F6 as a dopant, allowing for a condensing cycle in hot environments. Thermal stability tests and Vapour Liquid Equilibrium measurements are conducted to accurately predict the thermodynamic properties of the mixture. Using Peng-Robinson equation with optimized binary interaction parameter, a thermodynamic assessment of the power cycle is performed, achieving an efficiency of 41.9% for an optimum mixture composition.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Carlos Arnaiz del Pozo, Schalk Cloete, Paolo Chiesa, Angel Jimenez Alvaro, Shahriar Amini
ENERGY CONVERSION AND MANAGEMENT-X
(2020)
Article
Thermodynamics
Mohammed N. Khan, Paolo Chiesa, Schalk Cloete, Shahriar Amini
ENERGY CONVERSION AND MANAGEMENT-X
(2020)
Proceedings Paper
Thermodynamics
Antonio Giuffrida, Paolo Chiesa, Francesca Drago, Luca Mastropasqua
ATI 2018 - 73RD CONFERENCE OF THE ITALIAN THERMAL MACHINES ENGINEERING ASSOCIATION
(2018)
Article
Thermodynamics
Giorgio Besagni, Riccardo Mereu, Fabio Inzoli, Paolo Chiesa
APPLIED THERMAL ENGINEERING
(2017)