Maths Halstensen
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View article: Low-Viscosity Nonaqueous Sulfolane–Amine–Methanol Solvent Blend for Reversible CO<sub>2</sub> Capture: Part II. Blend Optimization, Water Effect, and Speciation
Low-Viscosity Nonaqueous Sulfolane–Amine–Methanol Solvent Blend for Reversible CO<sub>2</sub> Capture: Part II. Blend Optimization, Water Effect, and Speciation Open
This work is part II of the investigation of a low viscosity, low regeneration energy nonaqueous CO2 capture solvent blend consisting of readily available chemicals diisopropylamine (DPA)–methanol–sulfolane and featuring the monomethyl car…
View article: Demonstration of CO<sub>2</sub> Capture Process Monitoring and Solvent Degradation Detection by Chemometrics at the Technology Centre Mongstad CO<sub>2</sub> Capture Plant: Part II
Demonstration of CO<sub>2</sub> Capture Process Monitoring and Solvent Degradation Detection by Chemometrics at the Technology Centre Mongstad CO<sub>2</sub> Capture Plant: Part II Open
In this work (Part II), we present quantitative monitoring of degradation for 30 wt % aqueous monoethanolamine (MEA) solvent using the residual Fourier transform infrared (FTIR) spectra extracted from the partial least-squares regression (…
View article: Influence of Nitrogen Dioxide Absorption on the Sulfite Oxidation Rate in the Presence of Oxygen: Online Raman Measurements
Influence of Nitrogen Dioxide Absorption on the Sulfite Oxidation Rate in the Presence of Oxygen: Online Raman Measurements Open
The oxidation of sulfite(aq) is investigated by passing O2, N2, and NO2 over a sulfite solution in a bubbling flask. The influence on sulfite oxidation of NO2 absorption and the presence of thiosulfate (an oxidation inhibitor) is investiga…
View article: Response Surface Modelling to Reduce CO2 Capture Solvent Cost by Conversion of OZD to MEA
Response Surface Modelling to Reduce CO2 Capture Solvent Cost by Conversion of OZD to MEA Open
The increasing CO2 concentration in the atmosphere is the most urgent global challenge. The most mature CO2 abatement option is post-combustion CO2 capture employing Monoethanolamine (MEA) solvent. One challenge of using MEA is its in-serv…
View article: Demonstration of CO<sub>2</sub> Capture Process Monitoring and Solvent Degradation Detection by Chemometrics at the Technology Centre Mongstad CO<sub>2</sub> Capture Plant
Demonstration of CO<sub>2</sub> Capture Process Monitoring and Solvent Degradation Detection by Chemometrics at the Technology Centre Mongstad CO<sub>2</sub> Capture Plant Open
Solvent management is one of the important current challenges in post combustion carbon capture (PCC) technology development. Using large-scale 1960 h test campaign data (Technology Centre Mongstad, Norway, 2015 MEA Test), we demonstrate a…
View article: Spray drop size characterization in an external-mixing bluff-body atomizer based on acoustics and Multivariate Analysis
Spray drop size characterization in an external-mixing bluff-body atomizer based on acoustics and Multivariate Analysis Open
Air-assist atomizers have been widely used in various applications such as the aerospace industry, internal combustion engines, molten metal, food processing, etc. The mean drop size for these atomizers was obtained through the Shadowgraph…
View article: Spray characterization in air-assist atomizers using flow-induced acoustic vibrations and multivariate analysis
Spray characterization in air-assist atomizers using flow-induced acoustic vibrations and multivariate analysis Open
This feasibility study investigated a new non-intrusive approach employing acoustic chemometrics. The method includes acoustic/vibration data recording obtained utilizing two clamp-on piezoelectric accelerometers and two electret condenser…
View article: Low-Viscosity Nonaqueous Sulfolane–Amine–Methanol Solvent Blend for Reversible CO<sub>2</sub> Capture
Low-Viscosity Nonaqueous Sulfolane–Amine–Methanol Solvent Blend for Reversible CO<sub>2</sub> Capture Open
In this work, the absorption–desorption performance of CO2 in six new solvent blends of amine (diisopropylamine (DPA), 2-amino-2-methyl-1-propanol (AMP), methyldiethanolamine (MDEA), diethanolamine (DEA), diisopropanolamine (DIPA), and eth…
View article: Deep Learning Approach for Raman Spectroscopy
Deep Learning Approach for Raman Spectroscopy Open
Raman spectroscopy is a widely used technique for organic and inorganic chemical material identification. Throughout the last century, major improvements in lasers, spectrometers, detectors, and holographic optical components have uplifted…
View article: Real-time monitoring of wood cladding spray painting properties and nozzle condition using acoustic chemometrics
Real-time monitoring of wood cladding spray painting properties and nozzle condition using acoustic chemometrics Open
An experimental setup simulating real-time wood cladding coating monitoring of nozzle conditions and spray paint properties has been investigated.This approach is based on affixed nozzle accelerometer sensors with appropriate signal condit…
View article: Classification of Gases and Estimation of Gas Flow Rate Based on Unsupervised and Supervised Learning Respectively
Classification of Gases and Estimation of Gas Flow Rate Based on Unsupervised and Supervised Learning Respectively Open
In this research project, acoustic chemometrics was assessed as a new method for both classification and prediction of flow rate of five selected gas types.The gas types were selected to span different densities as much as possible while a…
View article: Partial least squares PLS1 vs. PLS2 - optimal input/output modeling in a compound industrial drying oven
Partial least squares PLS1 vs. PLS2 - optimal input/output modeling in a compound industrial drying oven Open
A feasibility study was carried out to assess the possibility of developing prediction models for monitoring drying conditions of wood coatings in one of Europe's largest and most modern coating plants for exterior cladding.These models we…
View article: Fast Water-Lean Solvent Screening using FTIR Spectroscopy: In-Situ (In-Line) Monitoring using an ATR Raction Cell Integrated with On-Line Monitoring Attached to a Lquid-Flowcell
Fast Water-Lean Solvent Screening using FTIR Spectroscopy: In-Situ (In-Line) Monitoring using an ATR Raction Cell Integrated with On-Line Monitoring Attached to a Lquid-Flowcell Open
This study presents a fast and precise solvent characterizing method for the screening of novel CO2 capture systems. In this method, time-base Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) spectroscopy was used for in-…
View article: Monitoring of Erosion in a Pneumatic Conveying System by Non-intrusive Acoustic Sensors - A Feasibility Study
Monitoring of Erosion in a Pneumatic Conveying System by Non-intrusive Acoustic Sensors - A Feasibility Study Open
This paper presents the results of a study where the feasibility of a non-invasive acoustic measurement method was tested for monitoring of erosion in a pneumatic conveying system during the dilutephase conveying of sand.Measurements were …
View article: Image analytical sandstone plug poro-perm prediction using angle measure technique (AMT) and chemometrics – A feasibility study
Image analytical sandstone plug poro-perm prediction using angle measure technique (AMT) and chemometrics – A feasibility study Open
This feasibility study evaluates an approach for prediction of sandstone plug porosity and permeability based on low-angle illumination imaging, the Angle Measure Technique (AMT) and chemometric multivariate calibration/validation. The AMT…
View article: Monitoring of scale formation in a pneumatic conveying system operating in a metal production plant
Monitoring of scale formation in a pneumatic conveying system operating in a metal production plant Open
Monitoring of scale progression in a pneumatic conveying system operating in a metal production plant was conducted during a five-month long monitoring period. A combination of an acoustic monitoring method and a laser imaging method provi…
View article: Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden
Proceedings of The 60th SIMS Conference on Simulation and Modelling SIMS 2019, August 12-16, Västerås, Sweden Open
The 60th SIMS conference on Simulation and Modelling (SIMS 2016) was held in cooperation with ICAE, 11th International Conference of Applied Energy in Våsteräs, Sweden.This was the 60th time for the conference SIMS.It was held the first ti…
View article: On-line Monitoring of Viscous Properties of Anti-icing Fluid Based
On-line Monitoring of Viscous Properties of Anti-icing Fluid Based Open
MSG Production is a company specializing in automated washing, de-icing, anti-icing and inspection of commercial passenger aircrafts.It is critically important that the viscosity of the anti-icing fluid is according to specifications.This …
View article: High Concentrated Mea Solvent Systems for CO2 Absorption - An FT-NIR and Raman Spectroscopic Investigation
High Concentrated Mea Solvent Systems for CO2 Absorption - An FT-NIR and Raman Spectroscopic Investigation Open
This study investigates the use of Fourier Transform Near-Infrared (FT-NIR) spectroscopy and Raman spectroscopy to monitor the CO2 absorption process when over 65 wt % concentrated monoethanolamine (MEA) solutions are used. Using high conc…
View article: Principal Component Analysis Applied to CO2 Absorption by Propylene Oxide and Amines
Principal Component Analysis Applied to CO2 Absorption by Propylene Oxide and Amines Open
Carbon dioxide absorption by mixtures of propylene oxide / polypropylene carbonate at 60 0 C was monitored by Raman spectroscopy at 20, 40 and 60 bar in a 2 L autoclave reactor.Multivariate preprocessing techniques were used to process raw…
View article: System Development for On-line Monitoring using Raman Spectroscopy for CO<sub>2</sub> Absorption by MEA
System Development for On-line Monitoring using Raman Spectroscopy for CO<sub>2</sub> Absorption by MEA Open
Among various kinds of technologies available, carbon dioxide (CO2) capture by monoethanolamine (MEA) is considered to be the most technically and scientifically matured technology which can be tested in industrial scale.When CO2 is absorb…
View article: Process Analytical Technology for CO2 Capture
Process Analytical Technology for CO2 Capture Open
Carbon capture and storage, which is also known as CCS, is an obligatory climate change mitigation technology to reduce the carbon dioxide gas emissions to the atmosphere thus limiting the average global temperature increase to 2°C. Proces…
View article: Raman Spectroscopy as an Online Monitoring Tool for CO2 Capture Process: Demonstration Using a Laboratory Rig
Raman Spectroscopy as an Online Monitoring Tool for CO2 Capture Process: Demonstration Using a Laboratory Rig Open
A laboratory CO2 capture rig at USN was used as a demonstration plant to show the feasibility of Raman spectroscopy for online monitoring of speciation in CO2 capture process. The spectroscopy was integrated to lean and rich amine streams …
View article: Equilibrium Measurements of the NH<sub>3</sub>-CO<sub>2</sub>-H<sub>2</sub>O System: Speciation Based on Raman Spectroscopy and Multivariate Modeling
Equilibrium Measurements of the NH<sub>3</sub>-CO<sub>2</sub>-H<sub>2</sub>O System: Speciation Based on Raman Spectroscopy and Multivariate Modeling Open
Liquid speciation is important for reliable process design and optimization of gas-liquid absorption process. Liquid-phase speciation methods are currently available, although they involve tedious and time-consuming laboratory work. Raman …