A5015803890- Carbon Dioxide Capture Technologies
- Phase Equilibria and Thermodynamics
- Ionic liquids properties and applications
- Process Optimization and Integration
- Membrane Separation and Gas Transport
- Wind and Air Flow Studies
- Carbon dioxide utilization in catalysis
- Catalysis and Oxidation Reactions
- Biofuel production and bioconversion
- Innovative Microfluidic and Catalytic Techniques Innovation
- CO2 Sequestration and Geologic Interactions
- Catalytic Processes in Materials Science
- CO2 Reduction Techniques and Catalysts
- Air Quality Monitoring and Forecasting
- Nuclear Engineering Thermal-Hydraulics
- Catalysis for Biomass Conversion
- Hydraulic and Pneumatic Systems
- Geothermal Energy Systems and Applications
- Manufacturing Process and Optimization
- Environmental Impact and Sustainability
- Indoor Air Quality and Microbial Exposure
- Catalysts for Methane Reforming
- Combustion and Detonation Processes
- Thermochemical Biomass Conversion Processes
- Electrocatalysts for Energy Conversion
Pacific Northwest National Laboratory
2015-2025
Government of the United States of America
2019-2025
Battelle
2013-2024
Richland College
2015-2020
This paper describes a solvent regeneration method unique to CO2-binding organic liquids (CO2BOLs) and other switchable ionic liquids: utilizing changes in polarity shift the free energy of system. The degree CO2 loading CO2BOLs is known control solvent; conversely, can be exploited as means loading. In this process, chemically inert nonpolar "antisolvent" (AS) such hexadecane (C16) added aid de-complexing from CO2-rich CO2BOL. addition assist reduces temperature required for our most recent...
A comprehensive evaluation of a recently developed water-lean amine-based solvent, namely<italic>N</italic>-(2-ethoxyethyl)-3-morpholinopropan-1-amine (2-EEMPA), has been performed to analyze its post-combustion CO<sub>2</sub>capture performance.
Metal-organic frameworks (MOFs) have proved to be very attractive for applications including gas storage, separation, sensing and catalysis. In particular, CO(2) separation from flue in post-combustion processes is one of the main focuses research among scientific community. One major issues that are preventing successful commercialization these novel materials their high affinity towards water not only compromises sorption capacity but also chemical stability. this paper, we demonstrate a...
The kinetics of the absorption CO2 into two nonaqueous CO2-binding organic liquid (CO2 BOL) solvents were measured at T=35, 45, and 55 °C with a wetted-wall column. Selected loadings run so-called "first-generation" BOL, comprising an independent base alcohol, "second-generation" in which alcohol conjoined. Liquid-film mass-transfer coefficient (k'g ) values for both to be comparable monoethanolamine piperazine aqueous under driving force, spite far higher solution viscosities. An inverse...
The deployment of transformational nonaqueous CO2-capture solvent systems is encumbered by high viscosities even at intermediate uptakes. Using single-molecule CO2 binding organic liquids as a prototypical example, we present key molecular features that control bulk viscosity. Fast CO2-uptake kinetics arise from close proximity the alcohol and amine sites involved in concerted fashion, resulting Zwitterion containing both an alkyl-carbonate protonated amine. population internal hydrogen...
N-(2-ethoxyethyl)-3-morpholinopropan-1-amine, also known as EEMPA, has recently been developed a post-combustion capture CO2 solvent. In this application, EEMPA can operate water-lean solvent, containing less than 5 wt.% H2O, without diluent component to manage viscosity. may be able achieve competitive specific reboiler duties (less 2.5 GJ/tonne captured) and several positive characteristics, including miscibility with water, low vapor pressure, good thermal oxidative stability. This paper...
This study presents a modified Wilhelmy plate method designed to accurately measure effective contact angles on the non-flat surface with complex topology. The new technique allows for precise control of temperature and gas environment captures real-time wetting dynamics between CO2 capture solvent packings. approach is novel carbon applications by measuring angle quantifying effects varying CO₂ loading wettability.
This manuscript provides a detailed analysis of continuous-flow, bench-scale study the CO2-binding organic liquid (CO2BOL) solvent platform with and without its polarity-swing-assisted regeneration (PSAR). encompassed four months continuous-flow testing candidate CO2BOL thermal PSAR using decane antisolvent. In both schemes, steady-state capture >90% CO2 was achieved simulated flue gas at reasonable liquid/gas (L/G) ratios. Aspen Plus modeling performed to assess process performance,...
A reduced model connecting molecular structure to viscosity for single-component carbon capture solvents is presented.
A new solvent-based CO2 capture process couples the unique attributes of non-aqueous, CO2-binding organic liquids (CO2BOLs) with newly discovered polarity-swing-assisted regeneration (PSAR) that is to switchable ionic liquids. Laboratory measurements PSAR indicate ability achieve a effect at 75 °C compared temperature 120 using thermal only. Initial also kinetic behavior release improved PSAR.
We present here an overview of water-lean solvents that compares their projected costs and performance to aqueous amine systems, emphasizing critical areas study needed evaluate against water-based brethren. The work presented focuses on bridging these knowledge gaps. Because the majority are still at lab scale, substantial studies model assess full scales. This presents a significant challenge as each formulation has different physical thermodynamic properties behavior, quantifying how...
This paper investigates the CO2 and N2O absorption behavior in water-lean gamma amino propyl (GAP)-1/TEG solvent system using a wetted-wall contactor. Testing was performed on blend of GAP-1 aminosilicone triethylene glycol at varied water loadings solvent. Measurements were made with representative lean (0.04 mol CO2/mol alkalinity), middle (0.13 rich (0.46 alkalinity) 0, 5, 10, 15 wt % 40, 60, 80 °C (0.08–0.09 5 °C. flux found to be nonlinear respect log mean pressure driving force (LMPD)....
Broad research is underway on developing transformational solvents that can capture of CO2 from flue gas with lower energy compared to aqueous amines. Water-lean, or non-aqueous, are being considered as a class due the prospect duties by not having heat and condense water. To date, little known about real world performance water-lean solvent systems commercial amine technologies, whether they utilize existing at least similar processing infrastructure. This paper provides key results...
This paper investigates CO2 absorption behavior in CO2BOL solvents by decoupling the physical and chemical effects using N2O as a nonreactive mimic. Absorption measurements were performed wetted-wall contactor. Testing was "first generation" CO2-binding organic liquid (CO2BOL), composed of an independent base alcohol. Measurements made with at lean (0.06 mol CO2/mol BOL) rich (0.26 loading, each three temperatures (35, 45, 55 °C). Liquid-film mass transfer coefficients (kg′) calculated...
We present novel design strategies for reduced viscosity single-component, water-lean CO2 capture organic solvent systems. Through molecular simulation, we identify the main molecular-level descriptor that influences bulk viscosity. Upon loading, a zwitterionic structure forms with small activation energy of ca 16 kJ/mol and stabilization 6 kJ/mol. Viscosity increases exponentially loading due to hydrogen-bonding between neighboring Zwitterions. find structures promote internal hydrogen...
Anhydrous tertiary alkanolamines chemically react with CO2 and H2S, greater selectivity for the latter. This is in direct contrast to aqueous amine-based solvent systems, which exhibit higher over H2S. pressure-induced chemical fixation of form zwitterionic ammonium alkylcarbonate ionic liquids, while same H2S at atmospheric pressures hydrosulfide liquids. difference capture pressure implies that certain anhydrous could be selective CO2. We present here first published vapor–liquid–liquid...
PNNL's most recent single-component diamine CO2BOL derivative, 2-EEMPA, is an attractive post- combustion carbon capture solvent. This solvent can be configured to achieve regeneration energies as low 2.0 GJ/tonne CO2 when with advanced heat integration, and total costs $47.1/tonne using a two-stage flash configuration. 2-EEMPA has been shown chemically durable, exhibits little foaming, maintains steady-state water loading of 1.6 wt%, demonstrated on continuous flow testing simulated flue...
Among the key barriers to commercial scale deployment is cost associated with CO2 capture. This particularly true for existing large, fossil-fired assets that account a large fraction of electricity generation fleet in developed nations, including U.S. Fitting conventional combustion technologies capture systems can carry an energy penalty thirty percent or more, resulting increased price power grid, as well overall decrease net plant output. Taken together positive growth demand...