Biomass Conversion and Biorefinery

, Volume 9, Issue 3, pp 521–529 | Cite as

Facile preparation of activated carbon foam via pyrolysis of waste bread under CO2 atmosphere

  • Junrui Cao
  • Yan Gao
  • Yuhui MaEmail author
Original Article


Activated carbon foam was prepared via direct pyrolysis of waste bread (WB) under CO2 atmosphere. The product was characterized by N2 adsorption/desorption and Fourier transform infrared spectroscopy (FTIR). The preparation process was investigated online by a thermogravimetric analyzer coupled with FTIR (TG-FTIR). The adsorption isotherms of methylene blue (MB) by the product were investigated. The experimental data demonstrated that the product had a high surface area of 1575 m2 g−1 and a total pore volume of 0.883 cm3 g−1. Thermal decomposition of polymers in WB mainly occurred between 200 and 500 °C, leading to the release of carbonyl compounds, aliphatic hydrocarbons, alcohols, and furans. The dominant CO2 activation process started at above 800 °C. The MB adsorption equilibrium data followed Langmuir model with a monolayer adsorption capacity of 403 mg g−1. This study provides a reference for the utilization of WB as a promising precursor of activated carbon foam adsorbent, which has highly porous structure and excellent floatability in water.


Activated carbon foam Waste bread Activation mechanism TG-FTIR Adsorption 



The authors acknowledge the financial support of Fundamental Research Funds for Central Public Welfare Scientific Research Institution (K-JBYWF-2017-T09) and National Key Research and Development Program of China (2016YFE0102400). The authors wish to thank the anonymous reviewers for their useful comments.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.The Institute of Seawater Desalination and Multi-Purpose UtilizationMinistry of Natural Resources (MNR)TianjinChina
  2. 2.School of Pharmaceutical Science and TechnologyTianjin UniversityTianjinChina

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