ROSSETTI , Ilenia

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Methods to treat kinetic data for the biodegradation of different plastic materials are comparatively discussed. Different samples of commercial formulates were tested for aerobic biodegradation in compost, following the standard ISO14855. Starting from the raw data, the conversion vs. time entries were elaborated using relatively simple...

Acetonitrile is increasingly used as solvent for the fine chemicals and pharmaceutical industries. Ethanol ammoxidation has been proposed as an alternative way for its production starting from a renewable source. This process leads to a complex mixture of products, which needs an optimized separation train to maximize the recovery and purity of...

The possibility to exploit diluted bioethanol streams is discussed for hydrogen production by steam reforming. An integrated unit constituted by a steam reformer, a hydrogen purification section with high- and low-temperature water gas shift, a methanator reactor and a fuel cell were simulated to achieve residential size cogeneration of 5 kW...

A bioethanol reforming system, capable of converting a diluted water-ethanol mixture into hydrogen, is sized and set up to produce 5 kW of electric power via a polymer electrolyte membrane fuel cells (PEMFC). A part of the produced hydrogen supplies heat for the reforming reaction without impairing the power generation, then no additional fuel...

The possibility to use diluted bioethanol solutions is investigated. Ethanol purification and anhydrification impacts for 50-80 % of its production cost, but it is compulsory only when bioethanol is used for gasoline blending. Bioethanol can be converted to hydrogen, an increasingly important energy vector, through the steam reforming process....

Several activity tests on a zeolite-based catalyst for the ethanol to ethylene dehydration reaction are used to outline the stoichiometry of 4 reactions describing the observed outcome. The heat and mass balances of a reactor were calculated. The thermal input was mainly sustained with a standard product-to-feed heat exchange. Upstream, two...

In this work we present the simulation of a plant for the exploitation of renewable hydrogen (e.g. from biomass gasification) with production of renewable ammonia as hydrogen vector and energy storage medium. The simulation and sizing of all unit operations were performed with Aspen Plus (R) as software. Vegetable waste biomass is used as raw...

One of the main limitations for hydrogen employmentasfuelinvehiclesisthedifficulty arising from its storage. The main requirements for an on-board storage device are lightweight, small dimensions, safety, high volumetric and gravimetric efficiency and quick loading and unloading procedures. Among suitable materials, activated carbons (ACs) well...

Renewable electricity, production/storage and distribution of green hydrogen and carbon dioxide emission reduction are just three of the practices needed for a net zero-emission world. The increasing amount of renewable energy produced requires the development of versatile technologies capable to store the excess renewable electricity produced....

The feasibility and performance of different strategies to purify a complex mixture of H2O/CH3CN/NH3/HCN from bioethanol ammoxidation are compared. Dichloromethane as entrainer is taken as a base case and compared with more sustainable molecules, such as ethyl acetate (EA), ethylene glycol (EG) and glycerol (G). The thermodynamic behavior of...

Second generation bioethanol, obtained by the fermentation of lignocellulosic biomass, which is not competitive with the food and feed field, is one of the most interesting promising biofuels, already available in semi-commercial amount. Steam reforming of bioethanol has been used here for sustainable hydrogen and syngas production. Differently...

Process simulation represents an important tool for plant design and optimization, either applied to well established or to newly developed processes. Suitable thermodynamic packages should be selected in order to properly describe the behavior of reactors and unit operations and to precisely define phase equilibria. Moreover, a detailed and...

A multi-level program for regressing thermodynamic parameters was tested on a lately quantified salting-out equilibrium involving acetonitrile + water + ammonium bicarbonate (of pseudo-type-II), plus on other two type-I case studies (n-heptane + benzene + methanol and water + ethanol + toluene), both with the UNIQUAC and NRTL models. The...

Bare titania and metal-promoted TiO2 catalysts were employed in the treatment of nitrates, which are ubiquitous pollutants of wastewater. The results show that the process can be carried out under visible light (from a white light LED lamp) and, in the best case, 23.5% conversion of nitrate was obtained over 4 h with full selectivity towards N2...

The experimental results of testing with different irradiation power are compared and used as a basis for the feasibility assessment and conceptual design of a photoreforming reactor. The highest H2 productivity (0.276 mol H2/h kgcat) was achieved with 1 g/L of 1 wt% Au/TiO2 P25 catalyst by using a 113 W/m2 UVA irradiation. Insufficient...

At present, ethylene is the most widely produced organic compound in the chemical industry. The main commercial way to obtain ethylene is by steam cracking of a wide range of hydrocarbon feedstocks, but biomass-derived ethanol can be catalytically dehydrated as a sustainable alternative route in order to exploit new renewable sources. The aim...

Several N-containing organic compounds of anthropic origin, namely dyes, pesticides/herbicides and pharmaceuticals, are responsible of water pollution, due to their high solubility in water and low adsorption in soil, leading to a high mobility in the aquifer. Besides pesticides and dyes, widely recognized as water pollutants, environmental...

The development of effective methods for the abatement of some harmful pollutants from waste waters and from hydric resources is a challenging task. Nitrogen containing compounds, such as inorganic ammonia, nitrites and nitrates are harmful contaminants for drinking water, inducing acute and/or chronic diseases, especially affecting infants and...

Solar energy, along with other renewable resources, is going to play a key role in waste treatments and CO2 conversion. Photocatalytic technologies can be considered an effective solution for these purposes. This work summarises the setup of two different reactor configurations for two challenging processes: nitrate/ammonia abatement from water...

Co/SiO2 catalysts with two Co contents of 10 and 30 mol% were prepared and used in ethanol steam reforming. With the aim of tailoring the materials features by varying the synthesis parameters, two different sol–gel procedures were designed, namely a modified hydrolytic alkoxide sol–gel synthesis and a (non-ionic) surfactant assisted one....

Ethylene production by ethanol dehydration has been investigated over a set of zeolites with BEA structure in acidic form (HAlBEA). The effect on Ni addition (up to 0.03g/g (3 mass%)) is explored as a means to improve ethylene selectivity limiting the formation of heavier byproducts. The reaction temperature has been varied between 300 and...