Infinity Supercritical

Supercritical Fluid Extraction Search Engine - Infinity Supercritical CO2 Extraction Publications Search Engine - Cannabis Industry - Publications On Demand - Real Time Browser Display

This SDR - Spinning Disc Reactor and Cavitation Reactor search was updated real-time via Filemaker on:

SDR - Spinning Disc Reactor and Cavitation Reactor Contents List

Previous Page View | Next Page View

Search Completed. Publication Name:

e6-190-16-00.pdf

Page Number: 001

PDF Text:

CATALYSIS – Photocatalysis - Dimitris I. Kondarides

PHOTOCATALYSIS Dimitris I. Kondarides

Department of Chemical Engineering, University of Patras, Greece

Keywords: Photocatalysis, semiconductor, photocatalyst, electronic properties, optical properties, mechanism, kinetics, photoreactor.

Contents

1. Introduction

2. Electronic and optical properties of semiconductors

3. Principles of semiconductor photocatalysis

4. Semiconductor photocatalysts and methods for improving performance 5. Photoreactors

6. Applications of semiconductor photocatalysis

7. Summary and conclusions

Glossary

Bibliography

Biographical sketch

Summary

Photocatalysis is a rapidly developing field of research with a high potential for a wide range of industrial applications, which include mineralization of organic pollutants, disinfection of water and air, production of renewable fuels, and organic syntheses. This article is focusing on semiconductor-mediated photocatalysis, that is, processes occurring on semiconductor-fluid interfaces irradiated with photons of proper energy. The theory and background necessary to understand semiconductor photocatalysis is first discussed, with emphasis given on the electronic and optical properties of bulk and particulate semiconducting materials. This is followed by the discussion of the principles of semiconductor photocatalysis and the thermodynamic and kinetic aspects which determine photocatalytic performance. The various types of available photocatalysts are then presented along with issues related to quantum efficiency, response to visible light and photochemical stability. A number of methods of improving photocatalytic performance are then described. The most important types of photoreactor configurations irradiated by artificial or solar light are presented and their advantages and disadvantages are discussed. Finally, a selection of representative semiconductor-mediated photocatalytic processes is presented, mainly focusing on environmental and energy related applications.

1. Introduction

The word “photocatalysis” is of Greek origin and composes of two parts: the prefix “photo” (phos: light) and the word “catalysis” (katalyo: brake apart, decompose). Although there is no consensus in the scientific community as to a proper definition of photocatalysis, the term can be generally used to describe a process in which light is used to activate a substance, the photocatalyst, which modifies the rate of a chemical

©Encyclopedia of Life Support Systems (EOLSS)

UNESCO – EOLSS SAMPLE CHAPTERS

PDF Image:

 Supercritical Fluid Extraction e6-190-16-00.pdf Page 001
SUPERCRITICAL CO2 EXTRACTOR FOR SALE: 5L, 10L and 20L - 2,000 psi Complete Supercritical Fluid Extraction System - closed loop. Our systems are made at our fabrication shop in the state of Washington. Systems available: 5L, 10L, 20L, 100L, and larger custom. Typical build time is 2 weeks. This is not a Apeks Supercritical or Waters Supercritical CO2 Fluid Extraction System. We believe it is a better system, since we use 1/2 inch tubing for the CO2 flow, which is 4 times the flow rate of a Apeks, and up to 64 times the flow rate of a Waters system. We believe the result is faster processing time and better yield from increased exposure to CO2 solvent. Perfect for extraction of terpenes, trichomes, and Cannabinoids. Supercritical CO2 Fluid Extraction is a art, and the operator must have experience and training to obtain results. Go to website

Search Engine Contact: greg@infinitysupercritical.com