Synthesis of sawdust-based porous carbon using Box–Behnken design for NO2 adsorption: modeling, optimization, and study of interaction effects

Tesfay Berhe Gebreegziabher, Solomon Kahsay Gebremariam, Shuang Wang, Hyungseok Nam

    Research output: Contribution to journalArticlepeer-review

    1 Scopus citations

    Abstract

    In this research, an inexpensive porous carbon was synthesized by chemical activation of a thermally carbonized sawdust using KOH as an activation agent. The effect of three major process parameters—temperature, time, and KOH concentration—on the uptake of NO2 and porous carbon yield were optimized using the Box–Behnken factorial design. The optimum operating conditions suggested were at a temperature = 746.18 °C, time = 73.08 min, and KOH concentration = 6.45 mol L−1. The activated carbon synthesized at optimal conditions had a maximum BET surface area of 1460.64 m2 g−1 with NO2 uptake capacity and yield of 449.64 mg g−1 and 41.25%, respectively. Furthermore, the optimized activated carbon was analyzed using various analytical methods and the reusability of the spent activated carbon was investigated in several cycles. The study confirmed that the porous sawdust activated carbon is a promising adsorbent for the effective removal of NO2 with a competitive yield.

    Original languageBritish English
    Pages (from-to)1405-1422
    Number of pages18
    JournalChemical Papers
    Volume77
    Issue number3
    DOIs
    StatePublished - Mar 2023

    Keywords

    • Activated carbon
    • Box–Behnken design
    • NO adsorption
    • Optimization
    • Sawdust
    • Yield

    Fingerprint

    Dive into the research topics of 'Synthesis of sawdust-based porous carbon using Box–Behnken design for NO2 adsorption: modeling, optimization, and study of interaction effects'. Together they form a unique fingerprint.

    Cite this