Article
Energy & Fuels
Andre Bolt, Ibrahim Dincer, Martin Agelin-Chaab
Summary: New designs of helical methane/natural gas reactors are proposed in this study, which utilize the Sabatier reaction for renewable production of methane. The study develops three models with different diameters and the same volume, and suggests optimizing the reactor design by varying specific parameters. The reactor model with a diameter of 0.0381 m achieves a reactant conversion of 75% and a yield of 87%, while the model with a cross-sectional diameter of 0.0254 m demonstrates the most effective cooling at a coolant temperature of 200 degrees C.
Article
Environmental Sciences
S. M. Al -Salem, H. J. Karam, M. M. Al-Qassimi
Summary: Pyrolysis of end of life tyres is a promising alternative to incineration or classical product recovery. The analysis showed that there was not much difference in the maximum conversion rate between different tyre grades, and the difference was attributed to the release of free radicals. The pyro-gas from the pyrolysis of end of life tyres contained abundant light hydrocarbon products, which could be utilized in oil and gas ventures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Physical
Laurent Fulcheri, Vandad-Julien Rohani, Elliott Wyse, Ned Hardman, Enoch Dames
Summary: A novel thermal plasma process for economically viable commercial-scale hydrogen and carbon black production is introduced in detail. The selectivity and yield of solid carbon and gaseous hydrogen are emphasized. Lab scale reactor data demonstrates the technical viability, with methane feedstock conversions of >99%, hydrogen selectivity of >95%, solid recovery of >90%, and the ability to produce carbon particles of varying crystallinity. The energy intensity of this process is currently around 25 kWh per kg of H2 produced, significantly lower than water electrolysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Alberto Boretti
Summary: The manuscript discusses a novel pathway for producing hydrogen through the thermal decomposition of methane with carbon black as a catalyst. The pathway utilizes molten salt for thermal energy transfer, producing carbon black particles of commercial interest without direct CO2 emissions. The proposed pathway has the potential to deliver cost-effective, carbon dioxide-free hydrogen.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Alan Maslani, Milan Hrabovsky, Petr Krenek, Michal Hlina, Sumathy Raman, Vineet Singh Sikarwar, Michal Jeremias
Summary: The study investigates methane pyrolysis for hydrogen and solid carbon production using a plasma reactor equipped with a DC plasma torch. Optimal methane conversion rates and gas composition were achieved at specific plasma power and input methane flow rates. The presence of oxygen was found to enhance methane conversion efficiency despite lower available energy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Amira Neni, Yacine Benguerba, Marco Balsamo, Alessandro Erto, Barbara Ernst, Djafer Benachour
Summary: The study focuses on Sorption-Enhanced Methane Steam Reforming (SE-MSR) process, highlighting the importance of temperature as a key parameter and the impact of exothermic carbonation reaction on the thermal regimes and performance of catalyst. Optimal operating conditions of both catalyst and adsorbent are crucial for maximizing hydrogen production and reducing CO2-related coke deposition.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Wen-Jenn Sheu, Chung-Yu Chang, Yen-Cho Chen
Summary: This study investigates the transient chemical reaction phenomena of sorption-enhanced steam methane reforming (SE-SMR) using Ni/Al2O3 catalyst and CaO sorbent. The results show that CO2 sorption reaction significantly enhances the rates of steam reforming and water gas shift reactions, leading to the production of high-purity H2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Erfeng Hu, Moshan Li, Yishui Tian, Xiaojian Yi, Chongyang Dai, Si Shao, Chenhao Li, Yunfei Zhao
Summary: Fast pyrolysis using rapid infrared heating improves heat transfer and inhibits secondary reactions of volatiles. Compared to conventional electric heating, rapid infrared heating yields a higher overall bio-oil yield and lower gas yield. Increasing temperature increases the nitrogenous compounds and phenols in the bio-oil. The structure of biochar becomes more ordered under infrared heating.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Suzana Ioana Calcan, Oana Cristina Parvulescu, Violeta Alexandra Ion, Cristian Eugen Raducanu, Liliana Badulescu, Tanase Dobre, Diana Egri, Andrei Mot, Vlad Popa, Mihaela Emanuela Craciun
Summary: This paper studied the slow pyrolysis of vine pruning waste in a fixed bed reactor and characterized the resulting products. The study identified the factors influencing the distribution of biochar and bio-oil, and established relationships between process performances and key parameters. The analysis of the biochar and bio-oil involved various techniques, including proximate and ultimate analyses, FT-IR and SEM analyses, and GC-MS analysis.
Article
Chemistry, Physical
Xu Qingli, Zhang Zhengdong, Liao Lifang, Lan Ping, Wang Rui, Chen Shoutao, Li Pize, Zhang Chenyang
Summary: The study found that temperature, space velocity, and water-to-carbon ratio play a crucial role in affecting hydrogen yield and carbon conversion during glycerol steam reforming for hydrogen production. The utilization of a two-stage fixed-bed catalytic reaction system can increase hydrogen yield and carbon conversion compared to a single-stage fixed-bed reactor, while also extending the life of the Nickel-based catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Pengcheng Wang, Jie Yu, Xiaotian Liu, Marcos Millan
Summary: This study investigates the effects of biomass density on product distribution, tar and gas compositions, and char characteristics during pyrolysis. Higher-density pellets produce more char and less tar, with the char being more reactive in combustion tests. Higher temperatures and pressures result in less reactive chars and lighter tars.
Article
Engineering, Environmental
Donghai Hu, Guoqiang Cao, Meijie Du, Jiejie Huang, Jiantao Zhao, Chunyu Li, Yitian Fang
Summary: This study systematically investigated the reaction characteristic of biomass pyrolysis volatiles with iron-based oxygen carriers for hydrogen production by chemical looping reforming. The results show that increasing the amount of oxygen carrier and temperature facilitates tar conversion and reduces carbon deposition. The low valent state of Fe promotes tar cracking, decreasing tar content while increasing carbon deposition.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yong-Gyu Noh, Young Jae Lee, Jina Kim, Yu Kwon Kim, JungSeub Ha, Shankara S. Kalanur, Hyungtak Seo
Summary: The study proposed a new method for hydrogen production through catalytic methane pyrolysis using a multi-stage bubble column reactor with liquid metal alloy catalysts. The 3-stage bubble column reactor showed higher methane conversion rates compared to the 2-stage reactor at high temperatures. Analysis of the carbon products revealed that similar carbon-based materials can be obtained from both reactors.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Adetunji Onigbajumo, Priyanka Swarnkar, Geoffrey Will, Thirumalachari Sundararajan, Alireza Taghipour, Sara Couperthwaite, Ted Steinberg, Thomas Rainey
Summary: Thermochemical water splitting is a promising approach for hydrogen production, and this study proposes a novel method to enhance the performance and yield of ceria as a catalyst for hydrogen production. The study also includes additional units for heat recovery and oxygen co-production to reduce the overall cost of hydrogen production. Through modeling and analysis, the study demonstrates the economic potential and low cost of solar-driven thermochemical water splitting for hydrogen production.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Mengying Liu, Zeai Huang, Yunxiao Zhou, Junjie Zhan, Kuikui Zhang, Mingkai Yang, Ying Zhou
Summary: Methane pyrolysis, a potential hydrogen production process, can transform CH4 into hydrogen without CO2 byproduct under the net-zero emission target. In this study, a new strategy using Ni foam and molten NaCl-KCl for methane pyrolysis to hydrogen production was proposed. The methane conversion rate was enhanced by increasing the amount of Ni foam, and the process was optimized through different catalyst amounts, height of Ni foam layer, and filling method. The addition of molten salt alleviated carbon deposition deactivation of the Ni foam and maintained its macrostructure.
Article
Chemistry, Physical
Houssame Boujjat, Giberto Mitsuyoshi Yuki, Sylvain Rodat, Stephane Abanades
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Engineering, Chemical
Anita Haeussier, Stephane Abanades, Anne Julbe, Julien Jouannaux, Martin Drobek, Andre Ayral, Bruno Cartoixa
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2020)
Article
Chemistry, Applied
Srirat Chuayboon, Stephane Abanades
Summary: Solar thermochemical conversion processes show promise for storing intermittent solar energy as high value chemical products. Experimental results demonstrate that lower pressure can lead to higher ZnO conversion rates and syngas production rates.
FUEL PROCESSING TECHNOLOGY
(2021)
Review
Energy & Fuels
Stephane Abanades, Sylvain Rodat, Houssame Boujjat
Summary: This paper discusses the solar thermochemical conversion of biomass or waste feedstocks through pyro-gasification for the clean production of high-value and energy-intensive fuels, aiming to reduce dependence on conventional energy resources and lower emissions of pollutants. By utilizing concentrated solar energy to drive endothermal reactions, more high-quality syngas can be produced without contamination by combustion products, while saving biomass resources. It presents relevant research studies, solar concentrating technologies, solar gasifier concepts, management strategies for solar energy variations, and modeling approaches for simulation of gasifiers to enhance the thermochemical performance of solar-assisted biomass gasification.
Article
Engineering, Chemical
Houssame Boujjat, Sylvain Rodat, Stephane Abanades
Summary: The economic feasibility of large-scale solar gasification for centralized H-2 production was evaluated, with solar hybrid and solar-only gasification showing higher competitiveness than the conventional process. A sensitivity study indicated that cost reduction could enable the three processes to reach a competitive range.
Article
Engineering, Chemical
Srirat Chuayboon, Stephane Abanades
Summary: Solar gasification of biomass is a promising avenue for the co-production of synthesis gas using renewable solar and biomass energy. The choice of oxidant plays a crucial role in determining gasification performance, with H2O yielding the highest total syngas production. The use of ZnO as an oxidant can lead to high-purity Zn metal production, highlighting the potential of solar-driven biomass gasification for sustainable and CO2-free energy production.
Review
Energy & Fuels
Malek Msheik, Sylvain Rodat, Stephane Abanades
Summary: Methane cracking provides a zero CO/CO2 emission hydrogen production alternative, with recent focus on using molten metals/salts to prevent rapid deactivation. This advanced technology could potentially improve sustainability through energy and heat transfer enhancements.
Article
Engineering, Chemical
Srirat Chuayboon, Stephane Abanades
Summary: In this study, the solar carbo-thermal and methano-thermal reduction of MgO and ZnO were performed, demonstrating a sustainable pathway to convert concentrated solar energy into high-value metals and fuels. The reduction reactions yielded gaseous metal species which were recovered as fine and reactive metal powders. The type of carbon reducing agent and operating conditions had an impact on the conversion and product distribution.
Review
Energy & Fuels
Stephane Abanades
Summary: The solar thermochemical two-step splitting of H2O and CO2 based on metal oxide compounds is a promising pathway for clean and efficient generation of hydrogen and renewable synthetic fuels. It eliminates the need for photocatalysts or intermediate electricity production, bypassing the main limitations of the low-efficient photochemical and electrochemical routes. The oxygen exchange capacity determines the fuel production output, and redox systems based on volatile and non-volatile metal oxides are particularly attractive.
Article
Chemistry, Physical
Alex Le Gal, Marielle Valles, Anne Julbe, Stephane Abanades
Summary: The main challenges and obstacles to the development of hydrogen/carbon monoxide production from the splitting of water/carbon dioxide through two-step solar thermochemical cycles are related to material concerns. This study investigates a new class of metal oxides, high entropy oxides (HEOs), to improve the specific amount of fuel generated per cycle with good kinetic rates.
Article
Physics, Fluids & Plasmas
Malek Msheik, Sylvain Rodat, Stephane Abanades
Summary: This study focuses on solar methane pyrolysis as a clean hydrogen and carbon production process. A hybrid solar/electric reactor was designed to cope with solar resource variability. Computational fluid dynamics simulations showed that increasing heating temperature and reducing gas flow rate improved methane conversion. Experimental results validated the potential of the hybrid reactor for solar-driven methane pyrolysis.
Article
Biochemistry & Molecular Biology
Alex Le Gal, Anne Julbe, Stephane Abanades
Summary: This study investigates the generation of solar thermochemical fuel through two-step thermochemical cycles using different redox-active compounds. The materials' synthesis, characterization, and performance assessment are conducted, with a focus on their ability to split CO2 during the cycles. The effect of material morphology on reactivity is also evaluated. The study finds that NiFe2O4 foam exhibits similar CO2-splitting activity as its powder form, while Ce0.9Fe0.1O2, Ca0.5Ce0.5MnO3, Ce0.2Sr1.8MnO4, and Sm0.6Ca0.4Mn0.8Al0.2O3 are not attractive candidates. Dual-phase ceria/perovskite composites show enhanced CO2-splitting performance compared to ceria.
Review
Chemistry, Physical
Stephane Abanades
Summary: Redox materials have been extensively studied for thermochemical processing applications such as solar fuel production, ammonia synthesis, thermochemical energy storage, and air separation. These materials can be processed in redox cycles to produce fuels from H2O and CO2 splitting, and for ammonia synthesis based on chemical looping cycles. They can also be used for solar thermochemical energy storage and oxygen separation from air.
Article
Green & Sustainable Science & Technology
Youssef Karout, Axel Curcio, Julien Eynard, Stephane Thil, Sylvain Rodat, Stephane Abanades, Valery Vuillerme, Stephane Grieu
Summary: This paper presents the modeling and dynamic control of a solar hybrid thermochemical reactor for syngas production. A thermodynamic equilibrium-based reactor model is proposed using the Cantera toolbox. A model-based predictive controller (MPC) is developed to maintain the reactor temperature and stability by adjusting mirrors or burning biomass. The MPC controller outperforms a reference controller and image-based DNI forecasts reduce error values, while an interpolation function reduces optimization time.
CLEAN TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Fernando A. Costa Oliveira, M. Alexandra Barreiros, Anita Haeussler, Ana P. F. Caetano, Ana Mouquinho, Pedro M. Oliveira e Silva, Rui M. Nova, Robert C. Pullar, Stephane Abanades
SUSTAINABLE ENERGY & FUELS
(2020)