An Insight into the Separation of 1,2-Propanediol, Ethylene Glycol, Acetol and Glycerol from an Aqueous Solution by Adsorption on Activated Carbon
نویسندگان
چکیده
Glycerol conversion processes such as aqueous phase reforming and hydrogenolysis generate value-added compounds highly diluted in water. Because distillation is a high energy demand separation step, adsorption could be an attractive alternative to recover these chemicals. Adsorption isotherms of 1,2-propanediol, acetol, ethylene glycol glycerol onto activated carbon were determined by batch experiments. These fitted slightly better the Freundlich equation than Langmuir equation. Acetol compound with highest at concentrations smaller 1 M. Properties adsorbate −OH group number, chain length, molecular size dipole moment, besides characteristics adsorbent surface area, oxygen ash content, are considered explain observed results. Moreover, experiments performed mixtures it was that molar amount adsorbed less predicted from individual treated separately. In addition, influence thermal pre-treatment temperature on capacity has been studied, optimum being 800 °C. An analysis showed most important parameters total pore volume content.
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ژورنال
عنوان ژورنال: Processes
سال: 2021
ISSN: ['2227-9717']
DOI: https://doi.org/10.3390/pr9081438