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
Thermodynamics
Dmitry Pashchenko, Ravil Musta, Anna Musta
Summary: This study investigated the steam methane reforming process in a microchannel reformer using experimental methods, CFD modeling, and numerical study. The results showed that methane conversion decreases with increasing Reynolds number, heat flux, and inlet temperature.
Article
Thermodynamics
Dino Mehanovic, Alexandre Al-Haiek, Philippe Leclerc, David Rancourt, Luc Frechette, Mathieu Picard
Summary: A concept of electrified Steam Methane Reforming (eSMR) using reformer tubes is proposed as a cost-effective pathway for hydrogen decarbonization. The concept applies radiant heating elements to a gas-fired reformer, and a thermochemical model and techno-economic analysis demonstrate its superior performance compared to mainstream alternatives. Results show that reformer tube electrification is both economically viable and technically feasible, making it a promising solution for low-cost decarbonization of hydrogen production.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Energy & Fuels
R. Ben-Mansour, M. A. Haque, M. A. Habib, S. Paglieri, A. Harale, E. M. A. Mokheimer
Summary: This study aims to investigate the effect of thermal boundary conditions on steam-methane reforming (SMR) and hydrogen recovery. Computational analysis is performed to examine the impact of constant and variable temperatures/heat fluxes, as well as radiation and transient inlet temperatures, on important parameters such as CH4 conversion, H2 recovery, H2 mass flow rates, and hydrogen mass flux through the membrane. The results show that increasing the reformer temperature leads to a higher methane conversion but a lower hydrogen recovery. Segmented conditions result in decreased methane conversion but increased hydrogen recovery compared to constant heat flux and temperature cases. Additionally, varying the temperature profile affects the conversion and recovery rates differently.
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
Thermodynamics
Ali Cherif, Ju-Sung Lee, Rachid Nebbali, Chul-Jin Lee
Summary: This study focuses on the design and optimization of autothermal reforming reactor for hydrogen production. Through a novel design and optimization, the performance and thermal efficiency were significantly improved compared to the traditional model.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Firas S. Alrashed, Stephen N. Paglieri, Zainab S. Alismail, Hassan Khalaf, Aadesh Harale, Johan P. Overbeek, Henk M. van Veen, Abbas S. Hakeem
Summary: Process intensification in a membrane reactor is an efficient and compact way to produce hydrogen, with methane conversions approaching 90%. Compared to conventional reactors, membrane reactors can achieve higher conversion rates in a shorter time. However, nitrogen leakage through the membrane may gradually increase during testing due to pinhole formation and leakage through end seals.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Peng Yan, Yi Cheng
Summary: Methane steam reforming is expected to be the dominant method for hydrogen production in the future. The use of a membrane reactor can significantly save energy and achieve process and equipment compactness, especially for decentralized applications. This study focuses on the design of a particle-based packed-bed membrane reactor and investigates its operational window and design challenges through experimental and computational approaches, with a particular emphasis on the scale of the reactor and catalyst activity. The results reveal the optimal operation conditions for maximizing hydrogen flux and identify catalyst activity as the key limiting factor for further process intensification.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Green & Sustainable Science & Technology
Eugenio Meloni, Marco Martino, Vincenzo Palma
Summary: Currently, hydrogen production in the EU relies heavily on methane steam reforming from natural gas, which results in significant CO2 emissions. However, the use of microwave-assisted reformers shows promise in achieving higher efficiency and lower energy consumption for hydrogen production.
Article
Chemistry, Physical
Pedro M. Araujo, Kevin M. da Costa, Fabio B. Passos
Summary: Nickel supported on perovskite supports showed high conversion and stability in the autothermal reforming of methane, especially Ni/CaTiO3 and Ni/BaTiO3. The alumina supported catalyst exhibited the highest initial conversion and selectivity, but deactivated over time.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mohammad Reza Talaghat, Nourollah Naamaki
Summary: This study models hydrogen production in coupled membrane reactors using different methods, showing that the conversion of methanol varies depending on the feed used in the combustion section. The research also explores the impact of different parameters on methanol conversion rate.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Zheng Li, Guogang Yang, Shian Li, Qiuwan Shen, Facai Yang, Han Wang, Xinxiang Pan
Summary: The application of fuel cells increases the demand for hydrogen, while the microchannel autothermal methane steam reactor operates at high temperature, potentially reducing its stability and lifespan. Research shows that reactors made of different materials exhibit different distributions of hot and cold spot temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Mingming Wang, Xiaoyao Tan, Julius Motuzas, Jiaquan Li, Shaomin Liu
Summary: The study produced metallic nickel hollow fiber membranes with a dense skin layer and porous nickel substrate for hydrogen production from methane steam reforming. The membranes showed high efficiency and stability, making them a promising option for cost-effective hydrogen production at high temperatures.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Thermodynamics
A. O. Oni, K. Anaya, T. Giwa, G. Di Lullo, A. Kumar
Summary: Interest in blue hydrogen production technologies is increasing, but a comprehensive assessment is still needed. This study compares the cost and greenhouse gas emissions of three natural gas-based blue hydrogen production technologies and finds that steam methane reforming and autothermal reforming are economically preferable. The study also highlights the importance of plant size and carbon capture rate in determining the cost and emissions of blue hydrogen production.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Medhat A. Nemitallah
Summary: This study investigates the characteristics of hydrogen separation and steam methane reforming in a palladium-based membrane reactor. The optimization of reactor design and operating parameters for higher hydrogen production is performed under non-reforming conditions. The study is then extended to consider hydrogen separation under steam methane reforming conditions. The results show reduced hydrogen permeation rate under steam methane reforming conditions compared to separation-only cases.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Manan Dosi, Irene Lau, Yichen Zhuang, David S. A. Simakov, Michael W. Fowler, Michael A. Pope
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Chemistry, Physical
David Garcia-Selfa, Alberto P. Munuzuri, Juan Perez-Mercader, David S. A. Simakov
JOURNAL OF PHYSICAL CHEMISTRY A
(2019)
Article
Chemistry, Applied
M. A. Murmura, S. Cerbelli, M. C. Annesini, M. Sheintuch
Summary: Membrane reactors for pure hydrogen production are complex systems that rely on the interplay between convection, dispersion, hydrogen permeation, and reaction kinetics. Simplified models have been developed to adequately describe the system while keeping computational costs low. This study aims to derive an enhanced Sherwood number to account for changes in composition due to reaction and permeation along the reactor.
Article
Chemistry, Applied
Yue Yu, Sogol Mottaghi-Tabar, Muhammad Waqas Iqbal, Aiping Yu, David S. A. Simakov
Summary: High surface area alumina-supported cobalt oxides and carbides were successfully synthesized using a one-pot reverse microemulsion method, with cobalt carbides showing high selectivity to CH4 formation and being more active and stable than cobalt oxides in CO2 hydrogenation reaction. In situ FTIR investigations revealed significant differences in reaction intermediates on cobalt oxide and cobalt carbide surfaces, indicating distinct reaction mechanisms.
Article
Engineering, Chemical
Nichthima Dharmasaroja, Tanakorn Ratana, Sabaithip Tungkamani, Thana Sornchamni, David S. A. Simakov, Monrudee Phongaksorn
Summary: The novel technique of using ammonia vapor treatment for 20 hours to synthesize Ni nanosheets has shown improvements in H-2 selectivity without decreasing CH4 conversion for CO2 reforming of methane. Additionally, catalysts prepared with hierarchical Ni nanosheets not only enhanced the H-2/CO ratio but also reduced carbon deposition during the reaction process.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Guanjie Sun, Sogol Mottaghi-Tabar, Luis Ricardez-Sandoval, David S. A. Simakov
Summary: The MoC/gamma-Al2O3 catalyst synthesized via reverse microemulsions showed the highest activity and stability, exhibiting complete selectivity to CO formation and high CO2 conversion rates.
TOPICS IN CATALYSIS
(2021)
Article
Chemistry, Physical
Nichthima Dharmasaroja, Tanakorn Ratana, Sabaithip Tungkamani, Thana Sornchamni, David S. A. Simakov, Monrudee Phongaksorn
Article
Engineering, Environmental
Moshe Sheintuch, Ernst D. German
Summary: This study aims to evaluate the permeance inhibition caused by the effect on the Pd membrane surface, analyzing the kinetic parameters of Pd surface catalyzed reactions and surface composition using a micro-kinetic model. The research finds that inhibition due to surface intermediates on Pd may be strong at relatively high temperatures and low hydrogen concentrations, but negligible under other conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Baoting Huang, Naseem S. Hayek, Guanjie Sun, Sogol Mottaghi-Tabar, David S. A. Simakov, Oz M. Gazit
Summary: Identifying key catalyst parameters that govern catalytic performance is a major challenge. Through a simplified methodology, this study highlights the importance of highly dispersed Mn2O3 particles in a dispersed Na2WO4 melt for promoting the oxidative coupling of methane. Experimental results and literature data show consistent correlations, providing insights into the behavior of the catalyst under OCM conditions.
Article
Energy & Fuels
Yichen Zhuang, David S. A. Simakov
Summary: In this study, landfill gas was converted into renewable natural gas using catalysts. It was found that the optimal Ru loading for CO2 conversion was 0.1-0.5 wt%, achieving a conversion rate of 80-87%.
Article
Nanoscience & Nanotechnology
Anastasiia Zakharova, Muhammad Waqas Iqbal, Edris Madadian, David S. A. Simakov
Summary: A CuO/γ-Al2O3 catalyst was synthesized using the reverse microemulsion method and its catalytic performance was evaluated at various temperatures and space velocities. The catalyst showed high selectivity towards CO generation and achieved near equilibrium CO2 conversion rates. After 80 hours of continuous reaction, the catalyst maintained stable performance with no significant carbon deposition.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Biotechnology & Applied Microbiology
Edris Madadian, Jamshid Rahimi, Mina Mohebbi, David S. A. Simakov
Summary: This study investigated the thermal decomposition kinetics of grape juice processing byproducts using differential thermogravimetric analysis. The results showed that grape pomace powder had the lowest activation energy and the highest energy efficiency, making it suitable for pyrolysis. Physicochemical characterization confirmed the potential of these pulp residues as feedstock for fuel and energy production. Grape seeds were found to have a higher lignin content and a relatively high cellulose and hemicellulose content, indicating their suitability for industrial applications and high saccharification potential. The proposed thermal conversion technique can convert the digestates of juice processing byproducts to biochar and bioenergy.
FOOD AND BIOPRODUCTS PROCESSING
(2022)
Article
Engineering, Chemical
Moshe Sheintuch, Olga Nekhamkina
Summary: This study classifies the dynamic patterns that emerge during the charging or discharging of Li-ion batteries under galvanostatic conditions. The exchange current function is examined for its effect on the kinetics. Nonuniformity in the parameters leads to noise that masks the behavior. The full model exhibits symmetry breaking events, even in the absence of noise, due to the perturbation effect of the liquid potential gradient.
Article
Environmental Sciences
Edris Madadian, David S. A. Simakov
Summary: The presence of emerging contaminants in water and wastewater resources is a concern for public health. This study investigates the thermal degradation of sewage sludge containing pharmaceutical and personal care products, and the potential for bioenergy production during the process. The results show that thermal treatment can significantly reduce the concentrations of these contaminants.
Article
Energy & Fuels
Gerald Duck, Yue Yu, David S. A. Simakov, Sean B. Walker
Summary: The study examines the environmental impacts of a selection of methanation catalysts in industrial scale synthetic natural gas production using the analytical hierarchy process (AHP). It is found that catalysts containing common metals have the lowest environmental impact per conversion rate, while catalysts containing ruthenium are the most detrimental to the environment despite offering favorable conversion rates in methanation reactors.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
