Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Thermochemical reduction modeling in a high-temperature moving-bed reactor for energy storage: 1D model

Journal Article · · Applied Energy
 [1];  [2];  [3];  [3];  [4];  [5];  [2]
  1. Mississippi State Univ., Mississippi State, MS (United States); OSTI
  2. Mississippi State Univ., Mississippi State, MS (United States)
  3. Michigan State Univ., East Lansing, MI (United States)
  4. Michigan State Univ., East Lansing, MI (United States); United Arab Emirates Univ., Al Ain (United Arab Emirates)
  5. Oregon State Univ., Corvallis, OR (United States)

The design of robust and efficient high-temperature thermochemical reactors and determination of operating conditions are critical steps toward enabling high-efficiency long-duration solar energy storage. This work presents a computational model for the thermal reduction of a metal oxide material (Mg-Mn-O) up to 1450 °C and the coupled complex transport phenomena in a novel tubular thermal reactor design that features the capability for a high extent-of-reduction (high energy storage density) and inherent heat recuperation. A one-dimensional model coupling counter-current gas–solid flow, two-phase heat transfer, thermochemical redox reactions, and species transport in a moving-bed reactor is developed. Simplified versions of the model are validated with published results in the literature for packed beds with both inert and reactive particles; the fully coupled model is also validated with experimental measurements of a moving-bed reactor in terms of local temperatures and oxygen release at the exit. Detailed comparisons on the effects of different boundary conditions in the reaction zone (prescribed wall temperature vs. heat flux conditions) and formulations based on a simple uniform flow assumption vs. plug flow using Ergun equation for gas flow are investigated. The results are compared with experimental measurements, and for all cases, the energy flow components in the reactor system and the thermal to chemical conversion efficiency and overall system efficiency are computed. Finally, the predicted high thermal-to-chemical efficiency ~95% and system efficiency ~30% agree with experimental measurements.

Research Organization:
Michigan State Univ., East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
Grant/Contract Number:
EE0008992
OSTI ID:
1976845
Alternate ID(s):
OSTI ID: 1828971
OSTI ID: 2530289
OSTI ID: 2530290
OSTI ID: 2530299
Journal Information:
Applied Energy, Journal Name: Applied Energy Journal Issue: PB Vol. 306; ISSN 0306-2619
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (34)

Enhancing thermochemical energy storage density of magnesium‐manganese oxides journal August 2019
Heat transfer to flowing granular media journal January 1975
Heat transfer to flowing granular material journal June 1982
A stable and accurate convective modelling procedure based on quadratic upstream interpolation journal June 1979
Experiment for modelling high temperature rock bed storage journal December 1991
Numerical study on coupled heat and mass transfers in an absorber with external fluid heating journal January 1995
Numerical simulation of the gas–solid flow in a bed with lateral gas blasting journal April 2000
Validated model of thermochemical energy storage based on cobalt oxides journal August 2019
Experimental demonstration of a 5 kWth granular-flow reactor for solar thermochemical energy storage with aluminum-doped calcium manganite particles journal June 2020
Thermal reduction of iron–manganese oxide particles in a high-temperature packed-bed solar thermochemical reactor journal May 2021
Understanding pressure changes in smouldering thermal porous media reactors journal May 2021
Heat transfer of gas flow through a packed bed journal June 2006
Transient discrete-granule packed-bed reactor model for thermochemical energy storage journal September 2014
Reduction kinetics for large spherical 2:1 iron–manganese oxide redox materials for thermochemical energy storage journal June 2019
Reduction of iron–manganese oxide particles in a lab-scale packed-bed reactor for thermochemical energy storage journal August 2020
Heat transfer in counterflow fluidized bed of oxide particles for thermal energy storage journal November 2018
Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling journal May 2020
A transient heat transfer model for high temperature solar thermochemical reactors journal January 2016
Particle scale studies of heat transfer in a moving bed journal September 2015
Evaluation of bed-to-tube surface heat transfer coefficient for a horizontal tube in bubbling fluidized bed at high temperature journal June 2019
Thermal model for the optimization of a solar rotary kiln to be used as high temperature thermochemical reactor journal September 2013
Dynamic simulation of integrated rock-bed thermocline storage for concentrated solar power journal December 2014
Cobalt/cobaltous oxide based honeycombs for thermochemical heat storage in future concentrated solar power installations: Multi-cyclic assessment and semi-quantitative heat effects estimations journal August 2016
Solar thermochemical heat storage via the Co3O4/CoO looping cycle: Storage reactor modelling and experimental validation journal March 2017
Investigations on thermochemical energy storage based on technical grade manganese-iron oxide in a lab-scale packed bed reactor journal September 2017
Thermodynamic and kinetic investigation of a technical grade manganese-iron binary oxide for thermochemical energy storage journal September 2017
Calorimetric method for determining the thermochemical energy storage capacities of redox metal oxides journal March 2019
Solar Energy on Demand: A Review on High Temperature Thermochemical Heat Storage Systems and Materials journal March 2019
Revisiting the BaO 2 /BaO redox cycle for solar thermochemical energy storage journal January 2016
The Prediction of the Emissivity and Thermal Conductivity of Powder Beds journal July 2004
Numerical investigation of nonisothermal reduction of hematite using Syngas: the shaft scale study journal July 2007
Inert and Reactive Oxide Particles for High-Temperature Thermal Energy Capture and Storage for Concentrating Solar Power journal January 2019
Synthesis of Zero Carbon Solid-State Fuel for Long Duration Energy Storage journal January 2021
Numerical Investigations of a Counter-Current Moving Bed Reactor for Thermochemical Energy Storage at High Temperatures journal February 2020