Efficiency of recirculation hoods

Recirculation hoods equipped with carbon and plasma filters are becoming more and more popular. The aim of this study is to determine the effectiveness of recirculation hoods with regard to PM2 5 and NOx removal in a 26 m3 lab kitchen with a gas furnace. With the carbon filter PM2 5 is reduced for about 30%. A fresh carbon filter removed about...

Efficiency of recirculation hoods with regard to PM2.5 and NO2

Recirculation hoods equipped with carbon and plasma filters are becoming more and more popular. The aim of this study is to determine the effectiveness of recirculation hoods with regard to PM2.5 and NOx removal in a 26 m3 lab kitchen with a gas furnace. With the carbon filter PM2.5 is reduced for about 30%. A fresh carbon filter removed about...

Forced convection mass deposition and heat transfer onto a cylinder sheathed by protective garments

In chemical, biological, radiological, and nuclear protective clothing, a layer of activated carbon material in between two textile layers provides protection against hazardous gases. A cylinder in cross flow, sheathed by such material, is generally used to experimentally test the garment properties. This is, however, complicated and predictive...

Phases management for advanced life support processes

For a planetary base, a reliable life support system including food and water supply, gas generation and waste management is a condition sine qua non. While for a short-term period the life support system may be an open loop, i.e. water, gases and food provided from the Earth, for long-term missions the system has to become more and more...

Evaluation of the intestinal absorption of deoxynivalenol and nivalenol by an in vitro gastrointestinal model, and the binding efficacy of activated carbon and other adsorbent materials

In vitro screening of 14 adsorbent materials, including some commercial products used to detoxify Fusarium-mycotoxins, were tested in the pH range of 3-8 for deoxynivalenol (DON)- and nivalenol (NIV)-binding ability. Only activated carbon showed to be effective with binding capacities of 35.1 μmol and 8.8 μmol DON and NIV/g adsorbent,...

Assessing the zearalenone-binding activity of adsorbent materials during passage through a dynamic in vitro gastrointestinal model

A novel approach is presented herein to study the intestinal absorption of mycotoxins by using a laboratory model that mimics the metabolic processes of the gastrointestinal (GI) tract of healthy pigs. This model was used to evaluate the small-intestinal absorption of zearalenone from contaminated wheat (4.1 mg/kg) and the effectiveness of...

Modelling sorption and diffusion in activated carbon: A novel low pressure pulse-response technique

A novel low pressure pulse-response technique, referred to as Multitrack, was applied for the simultaneous determination of the adsorption and diffusion parameters of gases in porous materials in a packed bed. Measurements were performed on two different carbons, Kureha and Sorbonorit B3, in the temperature range between 473 and 700 K. The...

Water sorption measured by sorption calorimetry

A calorimetric method is described for the determination of adsorption and desorption of adsorptives that are liquid at room temperature, focussing on the sorption of water. Together with the isotherms, the sorption thermodynamics is determined in one experiment by determining the heat flow needed for generating the vapour and the heat flow...

Protection against toxic compounds: chemical and technological aspects