Investigation of the characteristics of gaseous formaldehyde emission from synthetic rubbers assisted by S-TiO2 catalyst

• Published in: IOP conference series. Earth and environmental science Vol. 675; no. 1
• Main Authors: Hu, Jianhua, Yao, Huazhen, Xu, Hengzhe, Ni, Zhumei, Dong, Bingxia, Yuan, Ronghui
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.02.2021
• Subjects: Aldehydes; Catalysts; Chemical reactions; Emission analysis; Environmental chambers; Formaldehyde; Hazardous materials; Pretreatment; Raw materials; Synthetic rubber; Test chambers; Titanium dioxide
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/675/1/012194

Gaseous formaldehyde emission from synthetic rubbers was simulated using a 60-L environmental chamber to explore the effect of different rubbers on formaldehyde emission. The formaldehyde emission factor (EF) of synthetic rubbers was more likely to exceed the limit for mixed type, which was mainly attributed to the quality of the adhesives in raw materials. Furthermore, the emission characteristics of mixed-type rubbers in small chambers were obtained. EF rapidly increased, especially during the inception stage, and then its rate of increase slowed, reaching a peak at approximately 4-5 h. The relative standard deviations of EF were within 5% when the measurement was extended to 13 h. This method can be used to monitor volatile hazardous substances emanating from synthetic rubbers, providing a theoretical basis for corresponding supervision. In addition, to degrade the background values in chambers, the photo-induced reactions were catalyzed with S-doped TiO2 under visible light, as this helped to shorten the pre-treatment time of the air in the chamber.