Article
Chemistry, Multidisciplinary
Xiaozhong Chen, Zunrong Sheng, Sho Murata, Shungo Zen, Hyun-Ha Kim, Tomohiro Nozaki
Summary: Dry methane reforming was studied in a newly developed fluidized-bed dielectric barrier discharge reactor, showing significant promotion compared to a packed-bed DBD reactor. The extended surface area of powdered catalysts and their interaction with plasma-generated reactive species in the fluidized-bed reactor were found to be the main mechanisms for promoting DMR. Additionally, enhanced heat and mass transport, along with longer residence time, contributed greatly to the enhancement of DMR performance.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Engineering, Environmental
Youngsan Ju, Hyun-Taek Oh, Jae-Cheol Lee, Chang-Ha Lee
Summary: A multi-scale dynamic model was developed for a sorption-enhanced water-gas shift (SE-WGS) fluidized bed reactor, analyzing the reactor performance with K2CO3-promoted hydrotalcite sorbent under different operating conditions. The study demonstrated that increasing the sorption capacity and rate of the CO2 sorbent could enhance the CO conversion rate and carbon capture efficiency of the SE-WGS fluidized bed reactor at 30 bar pressure.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Zhanghao Wan, Shiliang Yang, Guirong Bao, Jianhang Hu, Hua Wang
Summary: The study examines the hydrodynamics and thermochemical characteristics of the sorption enhanced steam methane reforming process in a fluidized bed reactor using a multiphase particle-in-cell model. The effects of critical operating parameters on gas thermal properties, bubble evolution, density-segregation mechanism, and heat transfer coefficients for Ni-catalyst and dolomite particles are discussed. Superficial gas velocity shows a positive effect on CH4 and H2O, gas temperature, and gas density while a negative effect on CO and H-2, gas specific heat capacity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Antonio Di Nardo, Elisa Savuto, Giorgio Calchetti, Stefano Stendardo
Summary: Sorption enhanced steam methane reforming (SE-SMR) is a technology that combines steam methane reforming with CO2 capture, resulting in enhanced hydrogen yield under more favorable thermodynamic conditions. Bifunctional sorbent-catalyst particles are used for stability over multiple cycles and integration of the endothermic methane reforming and exothermic CO2 capture. The process is operated in a dual fluidized bed reactor (DFB) for sorbent regeneration through high temperature calcination, increasing productivity and optimization.
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
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
Engineering, Environmental
Fardin Sattari, Maryam Tahmasebpoor, Jose Manuel Valverde, Carlos Ortiz, Mousa Mohammadpourfard
Summary: The manuscript presents a general model for a fluidized bed carbonator reactor based on bed hydrodynamics, kinetics, and sorbent properties in the Calcium Looping (CaL) process. The study identifies key operational and hydrodynamic factors affecting CO2 capture efficiency, and highlights important model parameters. The model predictions are in agreement with experimental results and may be relevant for optimizing CaL operation conditions in power plants.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Liyan Sun, Kun Luo, Jianren Fan
Summary: A circulating fluidized-bed reactor for methanation was studied numerically, showing its feasibility and advantage in the methanation process. The reactor can be used effectively with higher temperatures for better product selectivity.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Antonio Coppola, Fiorella Massa, Fabrizio Scala
Summary: In the context of carbon capture and utilization technologies and bio-energy transition, catalytic methanation is considered as an interesting pathway for producing synthetic methane for energy storage. Synthetic methane has significant advantages such as existing infrastructure, social acceptance, and widespread usage. The production of synthetic methane is being investigated by the scientific community.
Article
Chemistry, Physical
Katarzyna Bizon, Krzysztof Skrzypek-Markiewicz, Mateusz Pronczuk
Summary: This paper discusses the concept of process intensification and integration through sorption-enhanced, solid-catalyzed chemical processes. An alternative solution with a dual fluidized-bed reactor-regenerator system simplifies control procedures compared to a system of parallel fixed-bed apparatuses. A mathematical model demonstrates how the bed hydrodynamics, as well as chemical reaction and physical adsorption equilibrium constants, influence system performance.
Article
Energy & Fuels
Joseba Moreno, Sally L. Homsy, Max Schmid, Gunter Scheffknecht
Summary: This study investigated the multicyclic behavior of limestone in a 20 kWth CaL facility and analyzed the performance of the carbonator under various process variables. The carbonator design achieved high CO2 capture efficiencies and apparent carbonation rates within the investigated operating conditions. The proposed design could potentially be integrated into existing load-following power plants for more flexible usage of CaL systems.
Article
Engineering, Chemical
Jan Derco, Nikola Soltysova, Tomas Kurak, Anna Vajicekova, Jozef Dudas
Summary: Calcium and magnesium are important for human health and reducing the corrosive effects of soft water on drinking water distribution materials. The recarbonization process was studied using fluidized bed reactors to increase the content of these elements in water. The influence of operating conditions was investigated, with the Mg2+ concentration being more affected by HCD quantity and CO2 flow, while the freshwater inflow had a lesser effect.
Article
Engineering, Environmental
Susanna Nilsson, Alicia Ronda, Alberto Gomez-Barea
Summary: The use of alkaline residue from the acetylene industry as in-bed sorbent to remove H2S from syngas was investigated. The reaction rate was affected by the presence of CO2 and H2O in the gas mixture. The sulfidation rate of calcined CS was influenced by operating parameters and showed promising potential as an alternative to conventional sorbents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Wei Zhang, Haiming Wang, Changfu You
Summary: A coupled methodology was developed to model the fluidized bed coating process considering particle abrasion. Experimental data was used to verify the models of evaporation, coating, and abrasion. The research provides an efficient approach for modeling fluidized bed coating processes and offers guidelines for practical application of in-situ desulfurizer preparation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Antonio Di Nardo, Giorgio Calchetti, Andrea Di Carlo, Stefano Stendardo
Summary: This work presents the modelling and simulation results of a bubbling fluidized bed reactor using CPFD method. The reactor, installed in ENEA ZECOMIX research infrastructure, performs Steam Methane Reforming (SMR) and CO2 capture via solid sorbents. The study focuses on the Sorption Enhanced Steam Methane Reforming (SE-SMR) process, where steam methane reforming is coupled with high temperature CO2 sorption and calcium looping (CaL) process for increased H2 yield. The numerical analysis and sensitivity study conducted in this paper serve as valuable support for experimental activities.
COMPUTERS & CHEMICAL ENGINEERING
(2023)