Sustainable hydrogen production options from food wastes


DUMAN G. , AKARSU K., YILMAZER A., Gundogdu T. K. , AZBAR N. , YANIK J.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol.43, no.23, pp.10595-10604, 2018 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 23
  • Publication Date: 2018
  • Doi Number: 10.1016/j.ijhydene.2017.12.146
  • Title of Journal : INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Page Numbers: pp.10595-10604
  • Keywords: Supercritical water gasification, Steam gasification, Hydrogen production, Biomass, SUPERCRITICAL WATER GASIFICATION, STEAM GASIFICATION, HYDROTHERMAL CARBONIZATION, CATALYTIC GASIFICATION, CHEMICAL-REACTIONS, BIOMASS, GLUCOSE, MANURE, VALORIZATION, LIQUOR

Abstract

In this study, two thermochemical processes, namely steam gasification and supercritical water gasification (SCWG), were comparatively studied to produce hydrogen from food wastes containing about 90% water. The SCWG experiments were performed at 400 and 450 degrees C in presence of catalyst (Trona, K2CO3 and seaweed ash). The maximum hydrogen yield was obtained at 450 degrees C in presence of K2CO3 catalyst. In second process, hydrothermal carbonization was used to convert food wastes into a high-quality solid fuel (hydrochar) that was further gasified in a dual-bed reactor in presence of steam. The steam gasification of hydrochar was carried out with and without catalysts (iron-ceria catalyst and dolomite). The maximum hydrogen yield obtained from steam gasification process was 28.08 mmol/g dry waste, about 7.7 times of that from SCWG. This study proposed a new concept for hydrogen production from wet biomass, combination of hydrothermal carbonization following steam gasification. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.