Sewage Sludge Derived Materials for CO2 Adsorption

Applied Sciences

Simona Oancea¹  Constantin Filote²  Marius Gheorghe Miricioiu³  Anca Zaharioiu³  Felicia Bucura³  Maria Simona Raboaca³  Roxana Elena Ionete³  Violeta Carolina Niculescu³  Marius Constantinescu³ 

[1] Faculty of Agricultural Sciences, Food Industry and Environmental Protection, Lucian Blaga University of Sibiu, 10 Victoriei Blvd, 550024 Sibiu, Romania;Faculty of Electrical Engineering and Computer Science, Stefan cel Mare University of Suceava, 720229 Suceava, Romania;National Research and Development Institute for Cryogenic and Isotopic Technologies-ICSI Rm. Valcea, 4th Uzinei Str., 240050 Ramnicu Valcea, Romania;

关键词: adsorbents;    carbon dioxide;    char;    pyrolysis;    sewage sludge;   

DOI  :  10.3390/app11157139

来源: DOAJ

【 摘 要 】

The study tried to contribute to solving two serious environmental issues: CO₂ reducing and sewage sludge disposal. Thus, sewage-sludge-derived materials were obtained in order to be evaluated for CO₂ adsorption capacity. Therefore, the char resulted after the sewage sludge pyrolysis was subjected to oxidation and chemical activation processes by using different quantities of alkaline hydroxide. One of the obtained materials, activated with a lower quantity of alkaline hydroxide, was also treated with acid chloride. Further, the materials were structural and texturally characterized, and material treated with acid chloride was used for CO₂ adsorption tests, due to high surface area and pore volume. The handmade system coupled to a gas chromatograph allowed the adsorption efficiency evaluation using different feed gases (rich and poor in CO₂) by completed purge of pipe line and on-line check. Additionally, the adsorption capacity, separation efficiency, and CO₂ recovery were calculated. Taking into account the values for adsorption capacity (separation efficiency and CO₂ recovery), it can be concluded that the sewage sludge derived material could be a promising solution for CO₂ reduction and waste disposal.

【 授权许可】

Unknown