Physico-chemical properties of hydrochars produced from raw olive pomace using olive mill wastewater as moisture source

Azzaz, Ahmed Amine; Jeguirim, Mejdi; Marks, Evan A.N.; Rad, Carlos; Jellali, Salah; Goddard, Mary‐Lorène; Ghimbeu, Camélia Matei

doi:10.5802/crchim.61

Cited by 8 publications

(20 citation statements)

References 65 publications

(81 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in carbonization temperature generally lead to an increase in heat transfer to the inner material which increases the conversion rate of organic material into a more stable structure [36]. The carbonization of the non-impregnated ROP previously performed by Azzaz et al [26] and Marks et al [27] using hydrothermal carbonization and slow pyrolysis under similar experimental conditions showed final yields between 55% and 38% for hydrochars and between 38% and 30% for biochars, respectively. The difference in final yields is clearly in favor of the impregnated biomass suggesting that the impregnation of OMWW increased the feedstocks' content in organic material which eventually will enhance their final solid mass.…”

Section: Carbonization Yield and Proximate Analysismentioning

confidence: 88%

“…The amount of minerals was investigated with two different methods for the two types of chars. Hydrochars mineral content was determined according to the Thomson and Leege method which was detailed in our previous paper [26,31]. As for biochars, the content in elements including K + , Na + , Mg 2+ and Ca 2+ was determined through X-ray fluorescence.…”

Section: Physico-chemical Characterization Of the Produced Hydrochars And Biochars Proximate Ultimate And Mineral Composition Analysismentioning

confidence: 99%

“…In order to evaluate the energetic capacity of the produced biochars/hydrochars heir high heating value (HHV) was quantified using an IKA C200 bomb calorimeter (Staufen, Germany). The experiment was performed according to DIN 51900 [33] at isoperibolic reaction mode and following the protocol detailed in our previous papers [26,29].…”

Section: Energy Contentmentioning

confidence: 99%

“…The carbonization process is performed in a liquid medium, transformed into a subcritical fluid under the effect of temperature (150-350 • C) and autogenetic pressure, thus reducing significantly the energetic consumption [25]. It has been also reported that hydrothermal carbonization reduces the content in minerals in the solid residues, which could be considered as an interesting method for impurities removal [26].…”

Section: Introductionmentioning

confidence: 99%

“…The sustainable management of these wastes has become an urgent issue due to their proved negative effects on the environment [28]. The slow pyrolysis and hydrothermal carbonization applications for these olive mill wastes conversion into carbonaceous materials has been carried out at lab scale under various experimental conditions [26,29]. However, to the best of our knowledge, there were no research works that focused on the comparison between the physico-chemical properties of the generated biochars and hydrochars from the IROP.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

et al. 2022

Self Cite

View full text Add to dashboard Cite

In this research work, an ecofriendly approach was adopted for the treatment of two abundant liquid and solid agricultural wastes generated by olive mill industry: olive mill wastewater (OMWW) and raw olive pomace (ROP). It consists, firstly of the impregnation of ROP by OMWW and the conversion of the resulting impregnated sample (IROP) into hydrochars and biochars through hydrothermal carbonization (HTC) and slow pyrolysis methods, respectively. The impact of the treatment temperature on the physico-chemical properties of the derived chars was assessed by various analytical techniques. The hydrochars production yields were found to be higher than the biochars ones and associated to the lower temperature used. However, the generated biochars possess higher carbon percentage and lower volatile matter contents. In addition, the increase of the hydrothermal and pyrolysis carbonization temperatures shows an increase of macro-elements contents and a significant decrease of the O/C ratios which led to an enhancement of the high heating value for both hydrochars and biochars. The FTIR and Boehm titration analysis highlighted a significant alteration of the biochars surface chemistry compared to hydrochars evidenced by the lower amount of functional groups. The collected data emphasize on the efficient potential application of hydrochars and biochars for agricultural and environmental applications, respectively. Furthermore, it was noted that both chars have high energetic potentials and could be used for co-firing with coal in industrial boilers.

show abstract

Section: Carbonization Yield and Proximate Analysismentioning

confidence: 88%

Section: Physico-chemical Characterization Of the Produced Hydrochars And Biochars Proximate Ultimate And Mineral Composition Analysismentioning

confidence: 99%

Section: Energy Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Synthesis of functional hydrochar from olive waste for simultaneous removal of azo and non-azo dyes from water

Haris

Khan

Paz‐Ferreiro

et al. 2022

Chemical Engineering Journal Advances

View full text Add to dashboard Cite

Industrial Two-Phase Olive Pomace Slurry-Derived Hydrochar Fuel for Energy Applications

Karim,

Martínez-Cartas,

Cuevas-Aranda

2024

Polymers

View full text Add to dashboard Cite

The present study aims to resolve the existing research gaps on olive pomace (OP) hydrochars application as a fuel by evaluating its molecular structures (FTIR and solid NMR analysis), identifying influential characteristics (Pearson correlation analysis), process optimization (response surface methodology), slagging–fouling risks (empirical indices), and combustion performance (TG-DSC analysis). The response surfaces plot for hydrothermal carbonization (HTC) of OP slurry performed in a pressure reactor under varied temperatures (180–250 °C) and residence times (2–30 min) revealed 250 °C for 30 min to be optimal conditions for producing hydrochar fuel with a higher heating value (32.20 MJ·Kg−1) and energy densification ratio (1.40). However, in terms of process efficiency and cost-effectiveness, the optimal HTC conditions for producing the hydrochar with the highest energy yield of 87.9% were 202.7 °C and 2.0 min. The molecular structure of hydrochar was mainly comprised of aromatic rings with methyl groups, alpha-C atoms of esters, and ether bond linkages of lignin fractions. The slagging and fouling risks of hydrochars were comparatively lower than those of raw OP, as indicated by low slagging and fouling indices. The Pearson correlation analysis emphasized that the enrichment of acid-insoluble lignin and extractive contents, carbon densification, and reduced ash content were the main pivotal factors for hydrochar to exhibit better biofuel characteristics for energy applications.

show abstract

Physico-chemical properties of hydrochars produced from raw olive pomace using olive mill wastewater as moisture source

Abstract: Physico-chemical properties of hydrochars produced from raw olive pomace using olive mill wastewater as moisture source

Cited by 8 publications

References 65 publications

Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

Synthesis of functional hydrochar from olive waste for simultaneous removal of azo and non-azo dyes from water

Industrial Two-Phase Olive Pomace Slurry-Derived Hydrochar Fuel for Energy Applications

Contact Info

Product

Resources

About