The separation of microalgae biomass from diluted cultures found in large-scale production systems is a major challenge for microalgae-related processes. Conventional methods use centrifugation but it requires too much energy (1 kWh/m3), the combination with previous pre-concentration operations such as settling or flotation needed to reduce this consumption. However, both and require addition chemical coagulants/flocculants, thus contaminating biomass. This work explores potential...

This paper presents experimental results on the evaluation of ammonia NH3 solvent for CO2 absorption. In this novel study, kinetic and absorption capacity is compared with traditional alkanolamine solvents. Experiments have been achieved in range temperatures 278-303 K 2 wt% - 5 303-333 wt % 50 amines aqueous solutions (MEA, DEA, MDEA). Our show that carbon dioxide by faster than carried out MDEA, except 2% at 288K. For 3% 278K, kinetics almost identical to MDEA. The most efficient solvents...

In this work, the kinetics of carbonyl sulfide (COS) absorption in a hybrid solvent containing diethanolamine (DEA) dissolved methanol was studied. The amine concentrations and temperatures ranged from 380 to 2030 mol m−3 298 323 K, respectively. With purpose estimating reaction rate constants for COS−DEA system, rigorous modeling COS carried out based on two-step zwitterion mechanism, used until now carbon dioxide sulfur compounds by alkanolamine aqueous solutions. A downhill simplex...

We study the hydrogen production by Auto-Thermal Reforming (ATR) process coupled with a CO 2 capture using an MonoEthanolAmine (MEA) aqueous solution and methanation as means of purification technique. Under several fixed assumptions on operating conditions, we found that large-scale 99mol% pure can be reached depends strongly temperature at ATR removed in step. High purity streams derive from high carbon absorption column avoids further parasitic reactions.

The incineration of biomass and waste is considered to produce water steam, which then would feed the High Temperature Electrolysis (HTE) process in order hydrogen. For these energy sources, a French context, results show that steam production cost could be range 0.02 0.06 euros per kilogram. Potentially 78 million vehicles fed with hydrogen coming from produced by currently nonvalorised domestic waste. Furthermore, for each source optimized estimation has been performed, including...

Strengthening of environmental regulations demands novel or enhanced technologies for Flue Gas Desulfurization (FGD). A fixed-bed reactor using sodium bicarbonate (NaHCO3(s)) is proposed to eliminate sulfur dioxide (SO2) in flue gases up the regulation limits, leading a maximum heat energy recovery. numerical model was developed fully characterize this reactor, based on fluidization, physicochemistry, hydrodynamic stability, and reaction properties. The allows determining replacement time...

Methyl mercaptan (CH3SH) absorption kinetics was studied for a hybrid solvent mixture consisting of diethanolamine/water/methanol concentrations 40/40/20 wt % and 40/20/40 temperatures between 313.9 353.0 K. CH3SH is usually found in sour gases removed along with other acid gases. Physicochemical characterization performed the treatment which to date lacking chemical data. A systematic methodology proposed assess effect each mass transfer, thermophysical properties, reactions system. An...

In the light of alarming impending energy scene, efficiency and exergy are unmistakably gathering momentum. Among efficient process design methodologies, literature suggests pinch analysis as two powerful thermodynamic methods, each showing certain drawbacks, however. this perspective, article puts forward a methodology that couples in way to surpass their individual limitations aim generating optimal operating conditions topology for industrial processes. Using new optimizing exergy-based...

High-temperature steam/CO 2 electrolysis process has been the scope of study for last decades. This confers a feasible and environmental approach to convert low-carbon electrical energy into chemical energy, stored in form synthetic gas (H CO) be further processed line with final use target. It focuses on Power-to-Methane technology using high-temperature molten carbonates electrolyzer (MCEC). A large-scale composed built-in MCEC model Balance Plant (BOP) equipment is proposed simulated...

In this work, we present the rigorous modeling of carbonyl sulfide (COS) absorption by N-methyldiethanolamine (MDEA) aqueous solutions, taking into account experimental data our previous works, for an extended temperature range 313−353 K and amine concentration 415−4250 mol/m3. We intend to clarify discrepancies on kinetic validation new range. The COS is based mass transfer chemical reaction at liquid/gas interface, considering Henry's law zwitterion mechanism. Reaction rate constants were...