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Toluene, Methanol and Benzaldehyde removal from gas streams by adsorption onto natural clay and faujasite-Y type Zeolite

Zaitan, Hicham and Mohamed, Elham F. and Valdés, Héctor and Nawdali, Mostafa and Rafqah, Salah and Manero, Marie-Hélène Toluene, Methanol and Benzaldehyde removal from gas streams by adsorption onto natural clay and faujasite-Y type Zeolite. (2016) Acta Chimica Slovenica, 63 (4). 798-808. ISSN 1318-0207

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Official URL: https://doi.org/10.17344/acsi.2016.2643


A great number of pollution problems come as a result of the emission of Volatile Organic Compounds (VOCs) into the environment and their control becomes a serious challenge for the global chemical industry. Adsorption is a widely used technique for the removal of VOCs due to its high efficiency, low cost, and convenient operation. In this study, the feasibility to use a locally available clay, as adsorbent material to control VOCs emissions is evaluated. Natural clay is characterised by different physical-chemical methods and adsorptive interaction features between VOCs and natural clay are identified. Toluene (T), methanol (M) and benzaldehyde (B) are used here as representatives of three different kinds of VOCs. Adsorption isotherms onto natural clay and faujasite-Y type zeolite (Fau Y) are obtained at room temperature. According to Langmuir model data, maximum adsorption capacities (qm) of Fez natural clay and zeolite toward methanol (M), toluene (T) and benzaldehyde (B) at 300 K are 8, 0.89 and 3.1 mmol g-1, and 15, 1.91 and 13.9 mmol g-1 respectively. In addition, the effect of temperature on the adsorption of toluene onto natural clay is evaluated in the range from 300 to 323K. An increase on temperature reduces the adsorption capacity of natural clay toward toluene, indicating that an exothermic physical adsorption process takes place. The enthalpy of adsorption of toluene onto Fez natural clay was found to be -54 kJ mol-1. A preliminary cost analysis shows that natural clay could be used as an alternative low cost adsorbent in the control of VOCs from contaminated gas streams with a cost of US$ 0.02 kg-1 compared to Fau Y zeolite with US$ 10 kg-1.

Item Type:Article
HAL Id:hal-01978415
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > University of Cadi Ayyad - UCAM (MOROCCO)
Other partners > National Research Center - NRC (Egypt)
Other partners > Université Sidi Mohamed Ben Abdellah - USMBA (MOROCCO)
Other partners > Universidad Católica de la Santísima Concepción - UCSC (CHILE)
Laboratory name:
Deposited On:11 Jan 2019 13:46

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