Abstract
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.
Highlights
IntroductionClimate change has attracted serious attention. Despite the economic shutdown caused by the coronavirus pandemic response, carbon dioxide emissions, which are main factor in the greenhouse effect (along with methane and nitrous oxide but in a higher concentration), reached a concentration in the atmosphere in 2020 of 414 ppm, constituting a continuous increase according to National Oceanic and Atmospheric Administration Global Monitoring Laboratory [1]
Nowadays, climate change has attracted serious attention
The char resulted after the pyrolysis process of sewage sludge was used to obtain CO2 adsorption materials
Summary
Climate change has attracted serious attention. Despite the economic shutdown caused by the coronavirus pandemic response, carbon dioxide emissions, which are main factor in the greenhouse effect (along with methane and nitrous oxide but in a higher concentration), reached a concentration in the atmosphere in 2020 of 414 ppm, constituting a continuous increase according to National Oceanic and Atmospheric Administration Global Monitoring Laboratory [1]. The high demand of activated carbon for pollutants adsorption resulted from different processes and for food or pharmaceutical obtaining can be justified due their textural properties, availability and low cost [16]. This type of materials has significant advantages, such as lower regeneration energies compared to others adsorbents [17], ability for functionalisation with different groups [18] and increased capacity to adsorb contaminants from gases and liquids matrices [19]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
