Optimal slow pyrolysis of apple pomace reaction conditions for the generation of a feedstock gas for hydrogen production

• Published in: International journal of hydrogen energy Vol. 41; no. 48; pp. 23232 - 23237
• Main Authors: Guerrero, M.R. Baray, Salinas Gutiérrez, J.M., Meléndez Zaragoza, M.J., López Ortiz, A., Collins-Martínez, V.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 28.12.2016
• Subjects: Apple pomace; CO2 capture; Hydrogen production; Pyrolysis; Pyrolysis; CO2 capture; Apple pomace; Hydrogen production
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2016.10.066

This research explores optimal reaction conditions for the generation of gas products, through the slow pyrolysis of apple pomace, to be used as a feedstock for the production of H2 by the absorption enhanced reforming of methane (AER). Pyrolysis was performed at 300–450 °C and heating rates 5–20 °C/min. Gases, tars and chars were quantified at different heating rates and isothermal conditions. Results indicate that at 400 °C a maximum of 71.5% W of non-condensable volatile matter (NCVM) can be obtained along with 25.4% W of condensable volatile matter (CVM), while only 3% W of residual matter (RM). At these conditions (NCVM) a gas composition of 49.8% CO, 26.8% CO2 and 23.4% CH4 (Vol) was generated. A thermodynamic analysis of this product gas was performed under AER through CO2 absorption by CaO. Calculations using a steam to methane ratio of 3.5 and 3.5 mol of CaO/mol of CH4 indicate that a maximum H2 production is achieved at 715 °C containing 73.0% H2, 19.1% CO, 5.3% CO2 and 2.5% CH4 with no carbon formation. •Slow and low temperature apple pomace pyrolysis to produce the highest yield.•Quantification and characterization of volatile matter compounds obtained.•Thermodynamic analysis of steam reforming/CO2 capture of gas product for H2.