title: Acetaldehyde removal using an atmospheric non-thermal plasma combined with a packed bed: role of the adsorption process.
abstract: This work is an attempt in order to help towards understanding the influence of the adsorption process on the removal of a VOC (acetaldehyde, CH3CHO) using cyclic non thermal plasma (NTP) combined with a packed-bed of a catalyst support, α-Al2O3. In the first part, the results obtained by placing the saturated alumina pellets inside the plasma discharge zone are discussed, in terms of acetaldehyde removal, CO and CO2 production. In the second part, adsorption of CH3CHO, CO, CO2 and O3 was carried out, from single and multicomponent mixtures of the different compounds. The results showed that (i) the adsorption capacities followed the order CH3CHO≫  CO2>CO; (ii) O3 was decomposed on the alumina surface; (iii) CO oxidation occurred on the surface when O3 was present. In the third part, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was used to follow the alumina surface during acetaldehyde adsorption. DRIFTS measurements demonstrated that besides the bands of molecularly adsorbed acetaldehyde, several absorptions appeared on the spectra showing the intermediate surface transformation of acetaldehyde already at 300K. Finally, the relationship between the adsorption results and the NTP combined with a packed-bed process is discussed.
authors: LSPM-CNRS UPR 3407, Université Paris 13, Sorbonne Paris Cité, 99 Avenue Jean Baptiste Clément Villetaneuse 93430, France.
authors: C
authors: C
authors: Klett
authors: LSPM-CNRS UPR 3407, Université Paris 13, Sorbonne Paris Cité, 99 Avenue Jean Baptiste Clément Villetaneuse 93430, France.
authors: X
authors: X
authors: Duten
authors: Chemistry Department, Royal University of Phnom Penh, Russian Federation Boulevard, Toul Kork, Phnom Penh, Cambodia.
authors: S
authors: S
authors: Tieng
authors: LSPM-CNRS UPR 3407, Université Paris 13, Sorbonne Paris Cité, 99 Avenue Jean Baptiste Clément Villetaneuse 93430, France.
authors: S
authors: S
authors: Touchard
authors: LSPM-CNRS UPR 3407, Université Paris 13, Sorbonne Paris Cité, 99 Avenue Jean Baptiste Clément Villetaneuse 93430, France.
authors: P
authors: P
authors: Jestin
authors: LSPM-CNRS UPR 3407, Université Paris 13, Sorbonne Paris Cité, 99 Avenue Jean Baptiste Clément Villetaneuse 93430, France.
authors: K
authors: K
authors: Hassouni
authors: LSPM-CNRS UPR 3407, Université Paris 13, Sorbonne Paris Cité, 99 Avenue Jean Baptiste Clément Villetaneuse 93430, France. Electronic address: arlette.vega@lspm.cnrs.fr.
authors: A
authors: A
authors: Vega-González
mesh_terms: D000079:Acetaldehyde / Q000302:isolation & purification*; D000327:Adsorption; D000395:Air Pollutants, Occupational / Q000302:isolation & purification*; D000537:Aluminum Oxide / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry; D002248:Carbon Monoxide / Q000737:chemistry; D002384:Catalysis; D010126:Ozone / Q000737:chemistry; D058626:Plasma Gases / Q000737:chemistry*; D013499:Surface Properties; D055549:Volatile Organic Compounds / Q000302:isolation & purification
chemical_list: D000395:Air Pollutants, Occupational; D058626:Plasma Gases; D055549:Volatile Organic Compounds; D002245:Carbon Dioxide; D010126:Ozone; D002248:Carbon Monoxide; D000079:Acetaldehyde; D000537:Aluminum Oxide
keywords: Acetaldehyde removal; Adsorption; Non thermal plasma; α-Al(2)O(3)