Catalytic pyrolysis of exhausted olive oil waste

Martín, Juan Vicente González; González, J.F.; Martínez, Guadalupe; Román, S.

doi:10.1016/j.jaap.2008.11.018

Cited by 63 publications

(29 citation statements)

References 21 publications

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“…There appeared to be hardly any fixed carbon in this material which implies that potentially very high yields of pyrolysis oils could be obtained if cracking of the primary pyrolysis products into non-condensable gases was minimized. The ash content of the OMWS was high (15.2 wt%) and was almost threefold higher than those reported for olive oil waste (crushed kernel and pulp) [14,15,29], but similar to those reported for olive mill waste vegetation water [30]. In the studies conducted by Vitolo et al [30], fresh effluents (vegetation water) that was not stored in open ponds was evaporated in a vacuum rotary evaporator to very high consistency and then dried in oven to produce solid residues; the ash contents of the effluent residues from the traditional batch and continuous threephase olive oil processing mills were 15 and 17 mass% respectively, while the olive husk had 1 mass%.…”

Section: Characteristics Of Omws Feedstockmentioning

confidence: 53%

“…Agblevor et al, [9] studied the conversion of poultry litter into biofuels and found that the liquids had high viscosities and low yields but the energy content of the fuel was higher than that of wood pyrolysis oils. Pyrolysis studies have also been conducted on olive mill wastes especially the pomace, pits and stones [13][14][15]. These studies showed that char yields were high but the quality of the liquid fuels were similar to other biomass pyrolysis liquids.…”

Section: Introductionmentioning

confidence: 99%

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Pyrolytic Conversion of Olive Mill Wastewater Sludge to Biofuels Using Red Mud as Catalyst

Agblevor¹,

Abdellaoui²,

Halouani³

et al. 2017

IJEPE

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Abstract:Olive mill wastewater sludge (OMWS) is an environmental pollutant in olive oil industry. The problem stems from the strong odor and poor biodegradability of OMWS because of its high phenolic compounds. In most Mediterranean countries, olive mill wastewater is stored in evaporation ponds and the residual sludge is landfilled for disposal. To address this environmental pollution problem, fluidized bed catalytic pyrolysis of OMWS was developed to produce pyrolysis liquids that are stable, low viscosity (5-7 cP), neutral pH (6-7), and high higher heating value (41 MJ/kg). The pyrolysis was conducted at 400-500°C in a red mud catalyst bed. The yields of the organic fraction were 29-35 mass%; char/coke yield was 20-29 mass%; and gas yield was 24-37 mass%. The 13 C NMR and GC/MS analyses of the liquid products showed predominance of aliphatic hydrocarbons and small fractions of aromatic hydrocarbons and ketones. The composition of these liquid products is in sharp contrast with most lignocellulosic biomass pyrolysis products which are normally rich in aromatic compounds and have very low aliphatic product content. In the absence of the red mud catalyst, the liquid product was viscous and contained acidic compounds.

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Section: Characteristics Of Omws Feedstockmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Pyrolytic Conversion of Olive Mill Wastewater Sludge to Biofuels Using Red Mud as Catalyst

Agblevor¹,

Abdellaoui²,

Halouani³

et al. 2017

IJEPE

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“…Experimental set-up, similar to previous works [20,21] is shown in Figure 1. Reactor consisted of a cylindrical tube of stainless steel 316.…”

Section: A Experimental Sectionmentioning

confidence: 99%

Hydrogen production by means pyrolysis and steam gasification of glycero

Martín¹,

González²,

Martínez³

et al. 2024

RE&PQJ

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Abstract. The objectives of this work were to optimize the variables affecting pyrolysis and steam gasification of glycerol (by-product formed during biodiesel production); and to characterize the gaseous phase formed, in order to carry out its energetic use. The studied operation variables were reaction temperature (700-900 ºC), water flow rate (0-0.173 g·min ). The most interesting phase (analyzed by gas chromatography) was the gas fraction. In this work, gas fraction was composed by H 2 , CH 4 , CO, C 2 H 6 , C 2 H 4 and CO 2 . The main gas generated was the hydrogen. Its generation was favoured by steam presence and its yield was increased in 224% in relation with pyrolysis process (default of water steam). The better conditions for studied process were 800 ºC, 0.074 g·min -1 of water flow rate, 0.009 g·min -1 of glycerol flow rate and 60 cm 3 ·min -1 of nitrogen flow rate. In these conditions, the volume of synthesis gas was 1.86 L·(g glycerol ) -1 and its higher heating value (HHV) was 26.70 MJ· (kg glycerol ) -1 . This study indicated that the bio-glycerol is an excellent raw material in the obtaining of medium heating value gases. These gases could be used as fuel in industrial furnaces or domestic use.

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“…The higher gas yields reported for the 2-stage reactor were probably due to extensive cracking of the pyrolysis vapors since the average temperature in the second section of the 2-stage reactor was slightly higher than what was experienced in the 1-stage reactor. Studies on zeolite catalytic cracking have shown generally that higher temperature increases the yield of the gas products due to the occurrence of secondary cracking reactions [26,[60][61][62][63][64]. From the results, the most widely influenced gases were H 2 and C 4 hydrocarbons.…”

Section: B432 Gas Analysismentioning

confidence: 99%