Test Gas Generation from Pure Liquids: An Application-Oriented Overview of Methods in a Nutshell

Li, Yue; Täffner, Tim; Bischoff, Michael; Niemeyer, Bernd

doi:10.1155/2012/417029

Cited by 23 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Xylene vapor was prepared through vapor saturation method (16,17). Porosity was determined by measuring the amount of water required to saturate a given volume of zeolite in a graduated cylinder, which was similar to the reactor system (18).…”

Section: Methodsmentioning

confidence: 99%

Adsorption of Xylene From Air by Natural Iranian Zeolite

2014

View full text Add to dashboard Cite

Background: Aromatic organic solvents are extensively used in various industries. Xylene is a colorless, transparent liquid, with the characteristic odor of the aromatic hydrocarbons family, which is widely used in industries. Adsorption is a conventional method of purifying polluted air containing volatile organic compounds (VOCs). Zeolite has many unique properties such as high capacity, molecular sieve characteristics, nonflammability, thermal stability, and strong acid sites. Moreover, it is reconstructed at low temperatures. Objectives: In this study, we investigated the effect of various parameters on the adsorption capacity of natural zeolite (clinoptilolite) for xylene adsorption. Materials and Methods: Physical and chemical properties of natural zeolites were tested by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) and elemental analyses of natural zeolites were characterized by X-ray diffraction. Xylene concentration was measured at various times through concentrations-measured valve before and after the adsorbent bed reactor by the direct reading of Phocheck (Ion Science Ltd, UK). Results: Experimental results showed that clinoptilolite is a potential sorbent for xylene in the range of ppm, and the breakthrough time would be reduced by increasing the concentration. The optimal temperature of xylene adsorption on natural zeolite was 35℃ and by increasing the temperature, the absorption efficiency of clinoptilolite was declined. The results showed that the breakthrough time and the exhaustion point time at the optimal conditions are 65 and 95 minutes, respectively. Adsorption capacity of clinoptilolite was obtained as 1.69 mg xylene/g zeolite. Conclusions: Experimental results showed that clinoptilolite is a potential sorbent for xylene in the range of ppm and the breakthrough time was reduced by increasing the concentration. Adsorption rate were increased by increasing concentration of xylene. Presence of xylene molecules in high concentration enhances their transfer and contact with adsorbent; as a result, by increasing gas concentration, breakthrough time in zeolite will be shorter.

show abstract

Section: Methodsmentioning

confidence: 99%

Adsorption of Xylene From Air by Natural Iranian Zeolite

2014

View full text Add to dashboard Cite

show abstract

“…The injection technique was used to generate vapors of a particular concentration of toluene. 41 Fig . 1 shows the schematic diagram of the adsorption and desorption experimental set-up.…”

Section: Dynamic Adsorption and Desorption Experimentsmentioning

confidence: 99%

Toluene adsorption on porous Cu–BDC@OAC composite at various operating conditions: optimization by response surface methodology

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Moreover, the response time of such a system is short, and thus the sensor detection speed can be evaluated. A major drawback of the approach is that the bubbler system may show fluctuations in test gas generation as reported elsewhere [34]. As shown below, the main cause of error while measuring the sensor response is due to uncertainty of solvent concentration provided by the vapor delivery system.…”

Section: Sensor Testing Setupmentioning

confidence: 98%

All-Organic Waveguide Sensor for Volatile Solvent Sensing

et al. 2019

View full text Add to dashboard Cite

An all-organic Mach-Zehnder waveguide device for volatile solvent sensing is presented. Optical waveguide devices offer a great potential for various applications in sensing and communications due to multiple advantageous properties such as immunity to electromagnetic interference, high efficiency, and low cost and size. One of the most promising areas for applications of photonic systems would be real-time monitoring of various hazardous organic vapor concentrations harmful to human being. The optical waveguide volatile solvent sensor presented here comprises a novel organic material applied as a cladding on an SU-8 waveguide core and can be used for sensing of different vapors such as isopropanol, acetone, and water. It is shown that the reason for the chemical sensing in device is the absorption of vapor into the waveguide cladding which in turn changes the waveguide effective refractive index. The presented waveguide device has small footprint and high sensitivity of the mentioned solvent vapor, particularly that of water. The preparation steps of the device as well as the sensing characteristics are presented and discussed.

show abstract

Test Gas Generation from Pure Liquids: An Application-Oriented Overview of Methods in a Nutshell

Cited by 23 publications

References 19 publications

Adsorption of Xylene From Air by Natural Iranian Zeolite

Adsorption of Xylene From Air by Natural Iranian Zeolite

Toluene adsorption on porous Cu–BDC@OAC composite at various operating conditions: optimization by response surface methodology

All-Organic Waveguide Sensor for Volatile Solvent Sensing

Contact Info

Product

Resources

About