Reforming of olive mill wastewater through a Pd-membrane reactor

Silvano Tosti, Carmine Accetta, Massimiliano Fabbricino, Mirko Sansovini, Ludovico Pontoni

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Abstract

This work investigates the exploitation of olive mill wastewater (OMW) for producing hydrogen in a membrane reformer. Olive mill wastewater was filtered and then concentrated via distillation. The intermediate distillate (about 49 wt%) with 10,600 mg L-1total organic carbon (TOC) was used to feed a membrane reactor consisting of a dense Pd-Ag permeator tube filled with Pt-based catalyst. The reforming tests were conducted at 450 °C in the pressure range 100-500 kPa by varying the space velocity from 2.78 × 10-3to 8.33 × 10-3mol h-1gcat-1. The Pd-Ag tube selectively separated the produced hydrogen, while the retentate streamdmainly containing non-permeated hydrogen, CO2and methanedwas collected from the shell side. Gas chromatographic analysis verified the presence of side reactions (hydrogenolysis, cracking, etc.) and the deactivation of the catalyst due to the carbon formation. The hydrogen recovery was positively affected by the pressure; its highest values (over 90%) were attained at 500 kPa, while the maximum hydrogen yield was measured at 300 kPa with a space velocity of 5.56 × 10-3mol h-1gcat-1. Up to 2 kg of permeated hydrogen was produced per ton of olive mill wastewater. Copyright © 2013, Hydrogen Energy Publications, LLC.
Original languageEnglish
Pages (from-to)10252 - 10259
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number25
DOIs
Publication statusPublished - 21 Aug 2013
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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