Two Algal Turf Scrubber (ATS) units were deployed on the Great Wicomico River (GWR) for 22 months to examine role of substrate in increasing algal productivity and nutrient removal. The yearly mean flat ATS screens was 15.4 g · m(-2) d(-1) . This elevated 39.6 with a three-dimensional (3-D) screen, 47.7 by avoiding high summer harvest temperatures. These methods enhanced removal (N, P) biomass 3.5 times. Eighty-six taxa (Ochrophyta [diatoms], Chlorophyta [green algae], Cyan-obacteria...

The electrocatalytic carbon dioxide reduction reaction (CO2RR) that produces liquid formic acid (FA) is one potential route to minimize the CO2 concentration in atmosphere by utilizing as a feedstock. However, of main disadvantages this high energy demand required for purification through conventional distillation. This method has been shown result large footprint life-cycle analysis (LCA). Therefore, finding an alternative technique can integrate with electrochemical CO2RR process lower...

In amine scrubbing carbon capture, concerns about solvent degradation include whether it can affect the ability of to capture CO2. This study examines interactions between three most reported monoethanolamine (MEA) thermal compounds─namely, oxazolidine-2-one (OZD), N-(2-hydroxyethyl)-ethylenediamine (HEEDA), and N-(2-hydroxyethyl)-imidazoline-2-one (HEIA)─with CO2 in presence absence MEA. We compared 1H NMR, 13C heteronuclear single-quantum coherence (HSQC) NMR for neat OZD, HEEDA, HEIA...

Abstract Background Towards the goal of integrating CO 2 capture using aqueous ammonia with its utilization for algae cultivation, Scenedesmus acutus (UTEX B72) was grown in 1100 L open raceway ponds and NH 3 supplied from gas cylinders. /NH mole ratios 7 10 were employed, mixture acting as a surrogate output scrubbing system ammonia. Results Compared to gaseous NaNO N‐source, displayed higher productivity at both ratios, ratio providing best growth. Depending on culturing conditions ratio,...

The buildup of flue gas contaminants in amine-based postcombustion CO2 capture processes is an important concern due to its potential impact on solvent degradation and reclaiming. In this research, order explore the thermal degradation, sodium nitrite, fly ash, sulfate, thiosulfate were each added into carbon-loaded 5.0 M monoethanolamine (MEA) solution solutions exposed high-temperature conditions. MEA degrades significantly more presence nitrite (5000 ppm) than alone at same amine mole...

The data from reports of 35 laboratories, comprising more than 2,000 analytical determinations, indicate that the vacuum-fusion method yields accurate r esults for oxygen contents plain-carbon steels either aluminum-killed, siliconkilled, or rimming type; aqueous-iodine results some types killed and low other steels; data, particularly concordant are necessary to define accuracy methods employed in this cooperative analysis.The procedures reviewed recommendations given obtaining optimum by method.

Solvent degradation is a major factor in the cost associated with carbon capture using aqueous amine solutions. Heat stable salts (HSS) from oxidative and acidic flue gas components, including SO2, NOx HCl can accumulate solvents lead to corrosion, extra energy requirements reduced efficiency. Accurate reliable quantitation of HSS concentration essential monitor solvent corrosion potential inside system. Two separate were tested 0.1 MWth pilot plant. 30% Monoethanolamine (MEA) was used as...

Formic acid is one of the most valuable fuel products for capture and conversion CO2 due to its unique usage in cells hydrogen storage. Electrochemically mediated FA has advantages over traditional Kemira process, that high temperatures pressures are not required, cutting on manufacturing operating costs. However, selectivity metal catalysts used certain remains limited. Here, an engineered enzymatic catalyst employed convert into formic (in form formate) a batch reactor. This work seeks...

Corrosion studies were carried out on metal coated and noncoated carbon steel as well stainless in a pilot-scale post-combustion CO2 capture process. Aqueous 30 wt % monoethanolamine (MEA) solvent was used without any chemical additive for antioxidation to examine worst-case scenario where corrosion is not mitigated. The rate of all steels almost zero the absorber column lean amine piping except Ni-coated (<1.8 mm/yr). Ni2Al3/Al2O3 precoated showed initial protection but lost their integrity...

Nitrosamines generated in the amine solvent loop of postcombustion carbon capture systems are potent carcinogens, and their emission could pose a serious threat to environment or human health. Nitrosamine control strategies critical for success amine-based as technology approaches industrial-scale deployment. Waterwash have been used volatile aerosol emissions, including nitrosamines, from carbon-capture plants, but it is still necessary remove destroy nitrosamines circulating waterwash...

The deposition of nickel and silver on platinum from the eutectic at 400°C has been studied using chronopotentiometric, cyclic voltammetric, potential step techniques. An observed predeposition was to take place 0.5V anodic equilibrium between in bulk solution its ions. process by an a‐c impedance method delineated as formation adsorbed monolayer. A similar but less well‐defined with 0.1V reversible potential. Notwithstanding phenomena, diffusion coefficients for both metal ions were...

Determinations of hydrogen in a variety ferrous materials were made by vacuum extraction at 800 0 C and fu sion.The warm method has the advantages rapid operation relative freedom evolved from association with other gases.A high content produced h eating temperature, or electrolysis, is unstable room but t he hyd rogen contents commercial steels, after hot working storage, low stable, without segregation .Steels chromium dissolve more retain it tenaciously than do plain carbon low-alloy...

Employing experimental kinetics data collected in this study, a power law rate equation for the thermal degradation of 2-amino-2-methyl-1-propanol (AMP) to 4,4-dimethyl-1,3-oxazolidin-2-one (DMOZD) as function amine and CO2 concentration solution is introduced. The experiments were carried out at 120, 135, 150 °C. Kinetic was extract initial from aqueous solutions 1.12, 1.68, 2.24, 3.36 M, AMP loadings 0.17 0.7, molCO2/molAMP. Since based on reactions solution, output kinetic model can be...

In the selection of candidates for post-combustion CO2 absorption, solvent degradation has become a general concern due to significant impact on operational cost and intention use thermal compression from high temperature stripping minimize overall process energy. this research, structural analogs amino acid salts, alkanolamines diamines were thermally degraded in order explore their stability standpoint. Functional groups, amine orders steric effect investigated degradation. Primary amines...

We have explored the relationship between physical properties and foaming behavior of 30 wt % aqueous monoethanolamine (MEA) solutions with three different surfactant-like additives. The additives included one commercial surfactant, cetyltrimethylammonium bromide (CTAB), two CO2 capture catalysts that behave as weak surfactants. interest were additives' affinity for liquid–vapor interface viscosity, surface tension, elasticity solutions. using molecular dynamics simulations well experiments....