Hydrogen production by catalytic conversion of olive mill wastewater in supercritical water

2018 ◽  
Vol 141 ◽  
pp. 224-229 ◽  
Author(s):  
P. Casademont ◽  
M.B. García-Jarana ◽  
J. Sánchez-Oneto ◽  
J.R. Portela ◽  
E.J. Martínez de la Ossa
Keyword(s):  
Hydrogen Production ◽  
Supercritical Water ◽  
Catalytic Conversion ◽  
Olive Mill Wastewater ◽  
Olive Mill

scholarly journals Ultra-Pure Hydrogen via Co-Valorization of Olive Mill Wastewater and Bioethanol in Pd-Membrane Reactors

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 219 ◽  
Author(s):  
David Alique ◽  
Giacomo Bruni ◽  
Raúl Sanz ◽  
José Antonio Calles ◽  
Silvano Tosti
Keyword(s):  
Hydrogen Production ◽  
Space Velocity ◽  
Green Energy ◽  
Olive Mill Wastewater ◽  
Membrane Reactors ◽  
Pure Hydrogen ◽  
Permeate Flux ◽  
Pd Membrane ◽  
H2 Recovery ◽  
Olive Mill

Olive mill wastewater (OMW) presents high environmental impact due to the fact of its elevated organic load and toxicity, especially in Mediterranean countries. Its valorization for simultaneous pollutants degradation and green energy production is receiving great attention, mainly via steam reforming for hydrogen generation. Following previous works, the present research goes into detail about OMW valorization, particularly investigating for the first time the potential benefits of OMW–bioethanol mixtures co-reforming for ultra-pure hydrogen production in Pd-membrane reactors. In this manner, the typical large dilution of OMW and, hence, excess water can be used as a reactant for obtaining additional hydrogen from ethanol. Fresh OMW was previously conditioned by filtration and distillation processes, analyzing later the effect of pressure (1–5 bar), oxidizing conditions (N2 or air as carrier gas), gas hourly space velocity (150–1500 h−1), and alcohol concentration on the co-reforming process (5–10% v/v). In all cases, the exploitation of OMW as a source of environmentally friendly hydrogen was demonstrated, obtaining up to 30 NmL·min−1 of pure H2 at the most favorable experimental conditions. In the membrane reactor, higher pressures up to 5 bar promoted both total H2 production and pure H2 recovery due to the increase in the permeate flux despite the negative effect on reforming thermodynamics. The increase of ethanol concentration also provoked a positive effect, although not in a proportional relation. Thus, a greater effect was obtained for the increase from 5% to 7.5% v/v in comparison to the additional improvement up to 10% v/v. On the contrary, the use of oxidative conditions slightly decreased the hydrogen production rate, while the effect of gas hourly space velocity needs to be carefully analyzed due to the contrary effect on potential total H2 generation and pure H2 recovery.

Effect of clay pretreatment on photofermentative hydrogen production from olive mill wastewater

2008 ◽  
Vol 99 (15) ◽  
pp. 6799-6808 ◽  
Author(s):  
Ela Eroğlu ◽  
İnci Eroğlu ◽  
Ufuk Gündüz ◽  
Meral Yücel
Keyword(s):  
Hydrogen Production ◽  
Olive Mill Wastewater ◽  
Olive Mill

Electrolytic Pretreatment of Olive Mill Wastewater (OMW) for Methane to Hydrogen Production

2010 ◽  
Vol 45 (11) ◽  
pp. 1529-1537 ◽  
Author(s):  
Maria Patoni ◽  
Tilemahos Passadis ◽  
Nicolas Kalogerakis
Keyword(s):  
Hydrogen Production ◽  
Olive Mill Wastewater ◽  
Olive Mill
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