Electrochemical Oxidation Assessment and Interaction of 2-aminoethanol and N, N-diethylethanamine Propagation in Acidic Medium

Electro�oxidation and inhibitor performance of copper specimens in 1 M hydrochloric acid solu� tion was investigated at room temperature by linear potentiodynamic polarization and gravimetric method in the presence of 2�aminoethanol (A) and N, N�diethylethanamine (D) as an inorganic inhibitor. The effect of the inhibitory concentration on the corrosion behavior of copper was studied over 288 hrs at 298°K. The inhibitory efficiency rise up to 96% for single induced and 98% for synergistic behavior. The adsorption mechanism characteristic was supported by SEM/EDX analysis and adsorption isotherm. From all indica� tion, the inhibitive efficiency of these compounds majorly depends on their molecular structure and concen� tration. The blocking effects of the surface interface were also explained on the basis of the inhibitor active action. 2�aminoethanol and N, N�diethylethanamine inhibits copper in 1 M HCl by strictly affecting both the anodic and cathodic sites. Portion of the surface covered calculated was also found to follow Langmuir adsorption isotherm

Estudo Da Produção De álcool Utilizando Como Matéria-prima A Cyperus Esculentus (tiririca)

Environmental problems caused by fossil fuels use and the need for a new path based on renewable energy sources leads biomass fuels development. Biofuels are considered strategic option for power generation, among them stands out ethanol. In order to minimize the competition with the food chain, the starch sources are alternatives biofuel obtainment, including the Cyperus esculentus (CE). This work aimed to study the ideal conditions for obtaining ethanol from CE flour fermentation, using the enzymatic route for the hydrolysis reaction. The fatorial design used was 3, in order to verify the influence of independents variables: fermentation time (h) and yeast concentration (g L-1) in enzymatic route, and degree alcoholic as the response (°GL). The tests in the raw material were realized, humidity content determination, starch content, reducing sugars (AR), chemically analyzed and scanning electronic microscopy (SEM) and UV-vis to determine the °GL response. The samples presented values humidity content 55.05%, starch content 52.38% and AR 12.23%. The SEM images showed elements protoxilema and protofloema. With the factorial design were achieved optimal conditions (15 g L-1 yeast concentration and 30 hours for fermentation time) for the production of ethanol with 24.27 ° GL.851510152