Standardizing ID-Labels for seaweed samples used for chemical composition analyses and refinery processes in Nordic and European research projects

Introduction Seaweed samples can be divided into two groups: Small samples (½-3 kg wet weight (ww)) often used for chemical content analyses including seasonal variation and testing different cultivation conditions or preliminary lab scale experiments on storage, extraction, separation, fermentation, etc. Larger samples (>3 kg ww) for lab- or pilot scale experiments on storage, extraction, separation, fermentation, etc. Seaweed samples will always have the following information-tracks: Sample Code: A ID containing the most important information and the sample code will follow the sampled biomass from harvest to final research results. Seaweed Processing Code: The sample code will be extended with 8 digits and 1 letter if processing of biomass occurs. Batch Number: A code describing details about the harvest and origin of the seaweed. Sample Overview: An Excel file describing all details about the sample: first sample code, then species, grinding, freezing/drying specifications, seeding and harvesting information, planed aim of the sample (e.g. polysaccharides), place stored, seaweed processing details, analyse results, etc. Maintained by the sample provider

Synthesis Properties of Feco3: Understanding the Underground Reactive Rock

Combatting anthropogenic CO2 emissions is one of the humanities considerable challenges, and carbon capture and storage (CCS) technologies are one of the tools that has been proposed for this. FeCO3 is attracting attention as it has been proposed to be a potential storage unit for CO2 injection in underground basaltic rock. Through mineral carbonation, dissolved CO2 reacts with underground reactive divalent metal-containing rock. However, the properties of FeCO3 is not well understood, and optimal permanent storage hinges on knowledge of the properties of the reactive species. We investigate the influence of synthesis parameters through a variation study, such as temperature, synthesis duration, and pressure. We then investigate the material properties, where the crystal structure and crystalline domains size is examined through XRD, thermal degradation stability with TGA and particle size with SEM. Through this investigation, a fundamental understanding of FeCO3 was gained, which will enhance the understanding of underground storage in reactive basaltic rock.publishedVersio

CO2 Impact on FeCO3 Corrosion Product

Reduction of the emissions of CO2 and other greenhouse gases is a global challenge. Carbon capture and storage (CCS) is one of the most ready to use technologies applicable for industries such as biogas upgrading, cement, and in general, gas cleaning. Even though the technology is mature, optimization is still needed to reduce costly production losses and shutdowns. CO2 corrosion is a significant problem in the industry, and therefore, fundamental information regarding the corrosion product, FeCO3, is needed. FeCO3 creates a protective barrier on the steel surface under the right conditions, and therefore information on the solubility is important. In this study, the solubility of FeCO3 in water and under the influence of CO2 is investigated. Results revealed that the FeCO3 solubility in water (with and without the presence of CO2) is constant with temperature. A global maximum in the FeCO3 solubility was seen when increasing CO2 pressure. This phenomenon is not seen in the typical carbonate systems.publishedVersio

Solid Solubility in the Aqueous 2-Amino-2-methyl-propanol (AMP) Plus Piperazine (PZ) System

In this work, the solid–liquid equilibrium (SLE) of the ternary system 2-amino-2-methyl-propanol (AMP)–piperazine (PZ)–H2O and the aqueous binary system AMP was determined using a freezing point depression setup and differential scanning calorimetry. A total of 59 new data points are listed in the full concentration ranges of 0 w(AMP) w(PZ) < 61%. The SLE phase boundary of AMP tetrahydrate (AMP·4H2O) was determined and confirmed by its crystal structure obtained by powder X-ray diffraction. The new data of this work can be used in the creation of a thermodynamic model for prevention of AMP and PZ precipitates from solvents used for CO2 capture. This gives a higher degree of safe operation. These data will allow for a deeper understanding of molecular interaction and bond lengths in the AMP–water system, which can be used for molecular simulation