scholarly journals Carbon capture test unit design and development using amine-based solid sorbent

2016 ◽  
Vol 112 ◽  
pp. 251-262 ◽  
Author(s):  
Ronald W. Breault ◽  
James L. Spenik ◽  
Lawrence J. Shadle ◽  
James S. Hoffman ◽  
McMahan L. Gray ◽  
...  
Keyword(s):  
Carbon Capture ◽  
Test Unit ◽  
Solid Sorbent ◽  
Design And Development ◽  
Unit Design

scholarly journals Life Cycle Assessment of Direct Air Carbon Capture and Storage with Low-Carbon Energy Sources

2021 ◽  
Author(s):  
Tom Terlouw ◽  
Karin Treyer ◽  
christian bauer ◽  
Marco Mazzotti
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Carbon Capture ◽  
Large Scale ◽  
Carbon Capture And Storage ◽  
Low Carbon ◽  
Solid Sorbent ◽  
Low Carbon Energy ◽  
And Storage ◽  
Limited Scope

Prospective energy scenarios usually rely on Carbon Dioxide Removal (CDR) technologies to achieve the climate goals of the Paris Agreement. CDR technologies aim at removing CO2 from the atmosphere in a permanent way. However, the implementation of CDR technologies typically comes along with unintended environmental side-effects such as land transformation or water consumption. These need to be quantified before large-scale implementation of any CDR option by means of Life Cycle Assessment (LCA). Direct Air Carbon Capture and Storage (DACCS) is considered to be among the CDR technologies closest to large-scale implementation, since first pilot and demonstration units have been installed and interactions with the environment are less complex than for biomass related CDR options. However, only very few LCA studies - with limited scope - have been conducted so far to determine the overall life-cycle environmental performance of DACCS. We provide a comprehensive LCA of different low temperature DACCS configurations - pertaining to solid sorbent-based technology - including a global and prospective analysis.

Multi-Phase CFD Modeling of a Solid Sorbent Carbon Capture System

2012 ◽  
Author(s):  
Emily M. Ryan ◽  
Wei Xu ◽  
David DeCroix ◽  
Kringan Saha ◽  
E. David Huckaby ◽  
...  
Keyword(s):  
Computational Modeling ◽  
Carbon Capture ◽  
Initial Conditions ◽  
Cfd Modeling ◽  
Phase Method ◽  
Valuable Insight ◽  
Solid Sorbent ◽  
Ansys Fluent ◽  
Design And Optimization ◽  
Multi Phase

Post-combustion solid sorbent carbon capture systems are being studied via computational modeling as part of the U.S. Department of Energy’s Carbon Capture Simulation Initiative (CCSI). The work focuses on computational modeling of device-scale multi-phase computational fluid dynamics (CFD) simulations for given carbon capture reactor configurations to predict flow properties, outlet compositions, temperature and pressure. The detailed outputs of the device-scale models provide valuable insight into the operation of new carbon capture devices and will help in the design and optimization of carbon capture systems. As a first step in this project we have focused on modeling a 1 kWe solid sorbent carbon capture system using the commercial CFD software ANSYS FLUENT®. Using the multi-phase models available in ANSYS FLUENT®, we are investigating the use of Eulerian-Eulerian and Eulerian-Lagrangian methods for modeling a fluidized bed carbon capture design. The applicability of the dense discrete phase method (DDPM) is being considered along with the more traditional Eulerian-Eulerian multi-phase model. In this paper we will discuss the operation of the 1 kWe solid sorbent system and the setup of the DDPM and Eulerian-Eulerian models used to simulate the system. The results of the hydrodynamics in the system will be discussed and the predictions of the DDPM and Eulerian-Eulerian simulations will be compared. A discussion of the sensitivity of the model to boundary and initial conditions, computational meshing, granular pressure, and drag sub-models will also be presented.

scholarly journals Hierarchical calibration and validation of computational fluid dynamics models for solid sorbent-based carbon capture

2016 ◽  
Vol 288 ◽  
pp. 388-406 ◽  
Author(s):  
Canhai Lai ◽  
Zhijie Xu ◽  
Wenxiao Pan ◽  
Xin Sun ◽  
Curtis Storlie ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Carbon Capture ◽  
Solid Sorbent ◽  
Calibration And Validation ◽  
Dynamics Models

Multi-phase CFD modeling of solid sorbent carbon capture system

2013 ◽  
Vol 242 ◽  
pp. 117-134 ◽  
Author(s):  
E.M. Ryan ◽  
D. DeCroix ◽  
R. Breault ◽  
W. Xu ◽  
E.D. Huckaby ◽  
...  
Keyword(s):  
Carbon Capture ◽  
Cfd Modeling ◽  
Solid Sorbent ◽  
Multi Phase

scholarly journals Real-Time Aerosol Measurements in Post-Combustion CO2 Capture Using ELPI+™ and Smooth and Sintered Collection Plates

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Chiranjib Saha ◽  
Justin H. Anthony
Keyword(s):  
Real Time ◽  
Co2 Capture ◽  
Flue Gas ◽  
Carbon Capture ◽  
Control Strategies ◽  
Test Unit ◽  
Significant Drop ◽  
Optical Images ◽  
Before And After ◽  
Median Diameter

The aerosols from CO2-depleted flue gas at the National Carbon Capture Center (NCCC) Pilot Solvent Test Unit (PSTU) and Slipstream Solvent Test Unit (SSTU) were measured in real-time using a Dekati Electric Low Pressure Impactor (ELPI+™). The coal-fired flue gas is provided by Alabama Power's Gaston Power Plant Unit 5. The utilization of ELPI+™ for aerosol research in postcombustion CO2 capture is very important due to its quick response time with size classification as low as 6 nm under transient conditions observed at the NCCC. Different process changes have been quantified at the PSTU and SSTU by multiple tests using the ELPI+™. The performance of smooth and sintered collection plates during dynamic process changes has been investigated. Between separate tests, upstream at unit 5, a new baghouse was installed. The aerosols measured at SSTU, before and after the baghouse installation, are compared. PSTU measurements demonstrated sample sensitivity to transient intercooler start-up conditions and dilution gas temperatures. During the tests, the typical concentration ranged from 106 to 107 cm−3. The aerosol's counter median diameter (CMD) for the sintered plates are lower (47–60 nm) compared to the normal plates (89–130 nm). The optical images indicate that sintered plates soak up all of the collected aerosols. The aerosol number concentration showed a significant drop after the baghouse installation. These results are promising and will enable the development of process control strategies to mitigate solvent losses and reduce operation and maintenance expenses.

scholarly journals 3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

2021 ◽  
Vol 3 ◽  
Author(s):  
Shreenath Krishnamurthy ◽  
Richard Blom ◽  
Kari Anne Andreassen ◽  
Vesna Middelkoop ◽  
Marleen Rombouts ◽  
...  
Keyword(s):  
Carbon Nanostructures ◽  
Carbon Capture ◽  
Power Plants ◽  
Point Sources ◽  
Solid Sorbent ◽  
Multiwalled Carbon ◽  
Cycle Times ◽  
Equilibrium And Kinetics ◽  
3D Printed ◽  
Breakthrough Experiments

Processes that utilize solid adsorbents to capture CO2 are promising alternatives to state-of-art Amine based technologies for capturing CO2 from large point sources. Although the energy needs of solid sorbent-based processes are low, the process footprint and consequently the capital cost connected to its implementation can be large due to the relatively long cycle times needed to get the required purity and recovery of the CO2 product. To overcome this challenge, processes having structured adsorbents like laminates, monoliths etc. are needed due to their low pressure drop and better mass transfer characteristics. The aim of this multiscale study is to evaluate the process-based performance of a 3D printed sorbent containing polyethyleneimine (PEI) and multiwalled carbon nanotubes (MWCNT) for capturing CO2 from a biomass fired power plant flue gas. A 6-step vacuum swing adsorption (VSA) cycle was simulated and optimized using equilibrium and kinetics data obtained from volumetry and breakthrough experiments. The optimization study showed that it was possible to achieve purity values >95% and recovery values >90% from dry CO2 feed streams containing 10 and 15% CO2 respectively. The minimum specific energy values were 0.94 and 0.6 MJ/kg and maximum productivity values were 0.8 and 2.2 mol/m3 ads s, respectively, for the two scenarios.

scholarly journals Design, Development, and Operation of an Integrated Fluidized Carbon Capture Unit Using Polyethylenimine Sorbents

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Ronald W. Breault ◽  
Lawrence J. Shadle
Keyword(s):  
Co2 Capture ◽  
Carbon Capture ◽  
Gas Flow ◽  
Gas Adsorption ◽  
Circulation Rate ◽  
Exponential Dependence ◽  
Design Development ◽  
Solid Sorbent ◽  
Process Step ◽  
Pressure Transducers

This paper presents the design, development, and operation of a reactor system for CO2 capture. Modifications were implemented to address differences in sorbent from 180 μm Geldart group B to 115 μm Geldart group A material; operational issues were discovered during experimental trials. The major obstacle in system operation was the ability to maintain a constant circulation of a solid sorbent stemming from this change in sorbent material. The system consisted of four fluid beds, through which a polyamine impregnated sorbent was circulated and adsorption, preheat, regeneration, and cooling processes occurred. Pressure transducers, thermocouples, gas flow meters, and gas composition instrumentation were used to characterize thermal, hydrodynamic, and gas adsorption performance in this integrated unit. A series of shakedown tests were performed and the configuration altered to meet the needs of the sorbent performance and achieve desired target capture efficiencies. Methods were identified, tested, and applied to continuously monitor critical operating parameters including solids circulation rate, adsorbed and desorbed CO2, solids inventories, and pressures. The working capacity and CO2 capture efficiency were used to assess sorbent performance while CO2 closure was used to define data quality and approach to steady-state. Testing demonstrated >90% capture efficiencies and identified the regenerator to be the process step limiting throughput. Sorbent performance was found to be related to the reactant stoichiometry. A stochastic model with an exponential dependence on the relative CO2/amine concentration was used to describe 90% of the variance in the data.

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