Title

Hydrochar preparation from black liquor by CO2 assisted hydrothermal treatment: Optimization of its performance for Pb2+ removal

Document Type

Journal Article

Publisher

Springer New York LLC

Place of Publication

United States

School

School of Engineering

RAS ID

24393

Comments

Originally published as: Sun, Y., Zhang, J., Guo, F., & Zhang, L. (2016). Hydrochar preparation from black liquor by CO2 assisted hydrothermal treatment: Optimization of its performance for Pb2+ removal. Korean Journal of Chemical Engineering, 33(9), 2703-2710. Available here.

Abstract

Hydrochar was produced from hydrothermal treatment of corn straw black liquor. Response surface methodology (RSM) and the central composite design (CCD) were employed for determination of optimal char with maximum Pb2+ removal capacity. The operational parameters such as hydrothermal temperature (°C), duration (min) and solid liquid ratio (LSR) were chosen as independent variables in CCD. The statistical analysis indicates that the effects of hydrothermal temperature, duration, LSR and combined effect of hydrothermal temperature and duration are all significant for the Pb2+ removal capacity. The optimal condition for achieving the maximum Pb2+ adsorption capacity is obtained as the following: hydrothermal temperature (205 °C), duration (28min), LSR (12) with Pb2+ removal capacity reaching 47mg/g. The BET specific surface area of char prepared at optimal conditions could reach 85m2/g.

DOI

10.1007/s11814-016-0152-0

Access Rights

Not open access

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