Performance of Thermal Swing Honeycomb VOC Concentrators.

Mitsuma, Yoichi; Ota, Yasutaka; Hirose, Tsutomu

doi:10.1252/jcej.31.482

Cited by 25 publications

(19 citation statements)

References 2 publications

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“…Various papers have reported parametric analysis or studies of regeneration in thermal swing adsorption (TSA), including optimization of the purge gas quantity and the energy required for regeneration (Basmadjian et al, 1975;Kumar and Dissinger, 1986;Huang and Fair, 1988;Schork and Fair, 1988;Huang et al, 1993;Hwang et al, 1997;Yun et al, 2000), cyclic simulation of the TSA system (Ko et al, 2002a(Ko et al, , 2002bRuthven, 1984), and empirical experimental analysis of the honeycomb rotor concentrator (Lin and Chang, 2009;Mitsuma et al, 1998). However, there have been few numerical studies of the concentration behavior of low-concentration VOCs gases in air by lowering the purge flow rate in fixed beds packed with granular or cylindrical adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Development of New Hybrid VOCs Treatment Process Using Activated Carbon and Electrically Heated Alumite Catalyst

Yamaguchi

Aoki

Sakurai

et al. 2013

J. Chem. Eng. Japan

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The purpose of this research is the development of a hybrid volatile organic compounds (VOCs) treatment process, which consists of adsorptive separation and catalytic oxidation. This process greatly reduces energy consumption compared with conventional thermal or catalytic combustion processes. Low concentrations of VOCs in polluted air are initially separated and concentrated into a small stream in the adsorptive step, and the concentrated VOCs are oxidized on an electrically heated alumite catalyst. Numerical system evaluation was carried out to estimate the e ect of the concentration of VOCs in the air on the material and energy balances. Experimental and theoretical studies were performed on the adsorption of toluene in nitrogen gas, and desorption and concentration by hot nitrogen purging, in xed-beds charged with activated carbon. A linear driving force mass-transfer model with an averaged overall mass-transfer coe cient was found to provide an acceptable t to the measured desorption data. The experimental and modeling results were used to assess the in uence of the purge gas ow rate and regeneration temperature on the bed length and cyclic steadystate convergence times using cyclic dynamic simulation of thermal swing adsorption. The evaluation results showed that a large amount of energy could be saved, and the unit cost lowered, by combining the adsorption step with electrically heated catalytic oxidation in the treatment of gases with low VOCs concentrations.

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Section: Introductionmentioning

confidence: 99%

Development of New Hybrid VOCs Treatment Process Using Activated Carbon and Electrically Heated Alumite Catalyst

Yamaguchi

Aoki

Sakurai

et al. 2013

J. Chem. Eng. Japan

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show abstract

“…Several studies have estimated the non-dimensional number between the efficiency and optimal rotation speed of the rotor, with a specific set of operating and design parameters [8,9]. Combining the HZRC with an oxidation process is more economical and efficient, and yielded fewer secondary emissions [2,10,11] compared to singleoxidation processes such as regenerative thermal oxidizer (RTO), regenerative catalytic oxidizer (RCO), and catalytic thermal oxidizer (CTO) processes.…”

Section: Introductionmentioning

confidence: 99%

“…Those results provided information for field applications to semiconductor industries to obtain optimal operating conditions of the concentrator for both efficient VOC controls and energy savings. Both field scale [3,10,[13][14][15] and lab-based assessments [2,7,8,12] have been performed for such an HZRC system, and this system can achieve 90% VOCs removal efficiency over a long period of stable operation. However, the current field efficiencies of HZRCs applied to thin film transistor liquid crystal display (TFT-LCD) industries are not as efficient as those used in the semiconductor and other chemical industries.…”

Section: Introductionmentioning

confidence: 99%

Optimizing operating parameters of a honeycomb zeolite rotor concentrator for processing TFT-LCD volatile organic compounds with competitive adsorption characteristics

Lin

Chang

2009

Journal of Hazardous Materials

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“…Mitsuma et al investigated VOC removals for such applications. They tested both the desiccant material in a fixed bed configuration (Mitsuma et al 1998a) and using an actual desiccant wheel (Mitsuma 1998b). They examined the removal of butyl acetate at concentrations of approximately 360 ppm and a variety of experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

The Volatile Organic Compound (VOC) Removal Performance of Desiccant-Based Dehumidification Systems: Testing at Sub-ppm VOC Concentrations

Wolfrum¹,

Peterson²,

Kozubal

2008

HVAC&R Research

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We investigated the ability of a typical desiccant wheel to remove two common volatile organic compounds (VOCs), toluene and n-hexane, from an airstream at concentrations in the range 50-150 ppb. The effects of wheel speed, regeneration temperature, relative humidity, and VOC challenge concentration were examined. The desiccant wheel was able to transfer ~70% of the toluene and ~20% of the n-hexane from the process inlet stream to the regeneration outlet stream for the default process parameter settings. These removal efficiencies varied only slightly over the range of process parameters studied.

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Performance of Thermal Swing Honeycomb VOC Concentrators.

Cited by 25 publications

References 2 publications

Development of New Hybrid VOCs Treatment Process Using Activated Carbon and Electrically Heated Alumite Catalyst

Development of New Hybrid VOCs Treatment Process Using Activated Carbon and Electrically Heated Alumite Catalyst

Optimizing operating parameters of a honeycomb zeolite rotor concentrator for processing TFT-LCD volatile organic compounds with competitive adsorption characteristics

The Volatile Organic Compound (VOC) Removal Performance of Desiccant-Based Dehumidification Systems: Testing at Sub-ppm VOC Concentrations

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