http://aoatools.aua.gr/pilotec/files/bibliography/Biofuels%20sources,%20biofuel%20policy,%20biofuel%20economy%20and%20global%20biofuel%20projections-1912165888/Biofuels%20sources,%20biofuel%20policy,%20biofuel%20economy%20and%20global%20biofuel%20projections.pdf

Biofuels sources, biofuel policy, biofuel economy and global biofuel projections

The occurrence of new emerging contaminants in surface waters has recently grabbed increased attention of the scientific community. The adoption of Advanced Oxidation Processes (AOPs) represents an efficient strategy to remove recalcitrant compounds from aqueous streams and achieve high mineralization levels. Amongst AOPs, the photo-Fenton process has been widely investigated due to the possibility of using a renewable energy source (i.e., solar energy) and low concentration of catalyst. On the other hand, the use of photo-Fenton process is restricted to acidic pH values, with associate high operating costs for industrial scale applications. To overcome these drawbacks, photo-Fenton processes modified by adding selected chelating agents can be successfully performed at neutral pH. The present review aims at examining and comparing the most relevant papers dealing with photo-Fenton processes at neutral pH that appeared in the literature so far. Such papers were classified by chelating species adopted. In particular, for each iron(III)-ligand complex, the mechanism of photolysis, the speciation diagram, the light absorption properties, the quantum yields, biodegradation and toxicity, and some example of applications are reported. As a conclusion, suitable criteria for choosing chelating agent and operating conditions in photo-Fenton processes at neutral pH are proposed.

Homogeneous photo-Fenton processes at near neutral pH: A review

Coal gasification in CO2 atmosphere and its kinetics since 1948: A brief review

Thank you very much for reading elements of chemical reaction engineering. As you may know, people have search numerous times for their favorite books like this elements of chemical reaction engineering, but end up in malicious downloads. Rather than reading a good book with a cup of coffee in the afternoon, instead they juggled with some harmful bugs inside their desktop computer. elements of chemical reaction engineering is available in our book collection an online access to it is set as public so you can download it instantly. Our book servers saves in multiple locations, allowing you to get the most less latency time to download any of our books like this one. Kindly say, the elements of chemical reaction engineering is universally compatible with any devices to read.

Elements Of Chemical Reaction Engineering

This paper deals with rapid pyrolysis of agricultural residues such as olive waste and straw at high temperature (800 -1000degreesC) in a free-fall reactor at pilot scale. The conditions are of interest for gasification in fluidized beds where rapid pyrolysis plays an important role as first stage. The objective of the work is to study the effect of the process conditions such as heating rate, temperature and particle size on the product distribution, gas composition and char reactivity. A higher temperature and smaller particles increase the heating rate resulting in a decreased char yield. The cracking of the hydrocarbons with an increase in the hydrogen content is favoured by a higher temperature and by using smaller particles. Wood gives more volatiles and less char than straw and olive waste. The higher ash content in agricultural residues favours the charring reactions. The higher lignin content in olive waste results in a higher char yield in comparison with straw. Chars from olive waste and straw are more reactive in gasification than chars from birch because of the higher ash content.

Rapid pyrolysis of agricultural residues at high temperature

Solids dynamics from experimental trajectory time-series of a single particle motion in gas-spouted beds

Fil: Doumic, Lucila Ines. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Mar del Plata. Instituto de Investigacion En Ciencia y Tecnologia de Materiales (i); Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingenieria; Argentina

Mineralization and efficiency in the homogeneous Fenton Orange G oxidation

Time series analysis of a binary gas-solid conical fluidized bed using radioactive particle tracking (RPT) technique data

The motion of binary mixtures of solids in a cylindrical three-phase fluidized bed has been examined using a non-invasive γ-ray emission particle tracking technique. Bubble wake motion and emulsion compensatory descending motion are seen to be the major factors affecting the solids mixing. Bubble rise velocities are found to follow a log-normal distribution and are shown to be weak functions of the degree of mixing of the solids. The mean solids flow patterns reveal a complex gulf streaming with a systematic strong vortex ring in the entrance region rising close to the vessel walls and descending in the centre

Solids circulation patterns in three-phase fluidized beds containing binary mixtures of particles as inferred from RPT

The motion of solids in a cylindrical liquid fluidized bed was experimentally characterized by means of a noninvasive radioactive particle tracking technique (RPT) for two monosized bed inventories, spherical glass beads (3 mm GB, density = 2,500 kg/m{sup 3}) and nonspherical poly-(vinyl chloride) particles (5.5 mm PVC, density = 1,300 kg/m{sup 3}). RPT-monitoring of a single radioactive solid tracer mimicking faithfully the characteristics of the solids revealed the detailed solids flow features by determining the tracer instantaneous 3-D Lagrangian trajectory and then its local instantaneous velocities. Transverse solids dispersion coefficients were an order of magnitude lower than their axial counterpart. Time, longitudinal, and circumferential averaging of local velocities in the fully developed region of the fluidized bed revealed a weak gulf streaming characterized by axial velocities positive (respectively negative) in the core and negative (respectively positive) near the vessel walls for the GBs (respectively for the PVCs). The measured mean circumferential ensemble-averaged radial velocity was essentially zero in the fully developed region. The solids flow turbulence field was anisotropic, but the less dense the particles, the closer to isotropy was the solids flow. Computed shear stress profiles showed that PVC particles exhibited a higher shear stress than GB particles. Themore » dynamic solids flow structure inside a 3-D liquid fluidized bed can be viewed as a core-annulus structure with axially-dispersed plug-flow and radial dispersion in each of the upward and downward zones.« less

Miryan Cassanello

Papers

Solids dynamics from experimental trajectory time-series of a single particle motion in gas-spouted beds

Mineralization and efficiency in the homogeneous Fenton Orange G oxidation

Time series analysis of a binary gas-solid conical fluidized bed using radioactive particle tracking (RPT) technique data

Solids circulation patterns in three-phase fluidized beds containing binary mixtures of particles as inferred from RPT

Flow structure of the solids in a three-dimensional liquid fluidized bed