Phosphorus extracted municipal sludge-derived hydrochar as a potential solid fuel: Effects of acidic leaching and combustion mechanism

Liu, Huan; Lyczko, Nathalie; Nzihou, Ange; Eskicioglu, Cigdem

doi:10.1016/j.cej.2023.145191

Cited by 11 publications

(8 citation statements)

References 54 publications

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“…This improvement in FR with increasing temperature and duration is attributed to the reduction in volatile matter and the augmentation of fixed carbon, as elucidated. The FR values of hydrochars obtained in this study are in line with those reported in existing literature. ,, The highest FR value observed was 1.27, which was obtained after subjecting the SW to a temperature of 260 °C for 24 h. This value exceeded the FR (1.24) of hydrochar derived from Kraft lignin at the same temperature but fell short of the FR (1.36) achieved by hydrochar derived from hornbeam at 275 °C . We observed a correlation between reaction severity and FR values, in that the increase in SF value resulted in a higher FR value.…”

Section: Resultsmentioning

confidence: 99%

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Sulfonic Acid-Catalyzed Biocoal Production from Lignocellulosic Biomass

Alper,

Auersvald,

Kejla

et al. 2024

Energy Fuels

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In this study, hydrothermal carbonization (HTC) of spruce wood was studied at different temperatures (200−260 °C) and residence times (2−48 h). An increase in the temperature and residence time resulted in higher heating values of hydrochars. The effect of temperature on the hydrochar yield and carbon content was more pronounced than the residence time. Two sulfonic acid catalysts were explored for the first time in the HTC of spruce wood at 240 °C for 24 h. The impact of sulfonic acid type and concentration on hydrochar yields and characteristics was investigated. Among the tested acids, methanesulfonic acid (MSA) had a significant effect on HTC, producing hydrochar with increased fixed carbon content and a higher heating value compared to noncatalytic runs and runs with dodecyl benzenesulfonic acid (DBSA) under identical conditions. The highest fuel ratio obtained was 1.47 with MSA at a concentration of 0.01 M. A detailed quantitative analysis of the aqueous phase from HTC processing using gas chromatography helped to elucidate the differences between the tested acids and demonstrated promoted lignin depolymerization with increasing MSA concentration. The use of sulfonic acid significantly increased the yield of levulinic acid in the aqueous phase. Overall, these findings highlight the potential of sulfonic acid catalysts in enhancing the efficiency and product quality of HTC processes, providing insights into optimizing biomass conversion for sustainable energy production and biocoal synthesis.

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Section: Resultsmentioning

confidence: 99%

“…Lastly, the process operates at temperatures lower than that of pyrolysis. These benefits make HTC an attractive option for converting various types of lignocellulosic biomass, including agricultural and industrial wastes, − algae, , sludge, , etc.…”

Section: Introductionmentioning

confidence: 99%

Sulfonic Acid-Catalyzed Biocoal Production from Lignocellulosic Biomass

Alper,

Auersvald,

Kejla

et al. 2024

Energy Fuels

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“… 102 For lignin-rich feedstocks, the HTL process can be optimized for polyols (precursors of polyurethane) production. 103 In addition, HTL-derived hydrochar could be a potential solid fuel after acid leaching, 104 and beyond struvite, the phosphorus extracted could be recovered as calcium phosphate 105 or hydroxyapatite. 84 Further, the HTL aqueous phase could also be used for the cultivation of algae and/or bacteria after proper pretreatment (e.g., partial oxidation, nanofiltration, adsorption) removing inhibiting compounds, 106 or be recirculated to the HTL influent as the reaction solvent to improve biocrude production.…”

Section: Opportunities and Challengesmentioning

confidence: 99%

Characterizing the Opportunity Space for Sustainable Hydrothermal Valorization of Wet Organic Wastes

Feng,

Li,

Strathmann

et al. 2024

Environ. Sci. Technol.

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Resource recovery from wet organic wastes can support circular economies by creating financial incentives to produce renewable energy and return nutrients to agriculture. In this study, we characterize the potential for hydrothermal liquefaction (HTL)based resource recovery systems to advance the economic and environmental sustainability of wastewater sludge, FOG (fats, oils, and grease), food waste, green waste, and animal manure management through the production of liquid biofuels (naphtha, diesel), fertilizers (struvite, ammonium sulfate), and power (heat, electricity). From the waste management perspective, median costs range from −193 $• tonne −1 (FOG) to 251 $•tonne −1 (green waste), and median carbon intensities range from 367 kg CO 2 eq•tonne −1 (wastewater sludge) to 769 kg CO 2 eq•tonne −1 (green waste). From the fuel production perspective, the minimum selling price of renewable diesel blendstocks are within the commercial diesel price range (2.37 to 5.81 $• gal −1 ) and have a lower carbon intensity than petroleum diesel (101 kg CO 2 eq•MMBTU −1 ). Finally, through uncertainty analysis and Monte Carlo filtering, we set specific targets (i.e., achieve wastewater sludge-to-biocrude yield >0.440) for the future development of hydrothermal waste management system components. Overall, our work demonstrates the potential of HTL-based resource recovery systems to reduce the costs and carbon intensity of resource-rich organic wastes.

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“…The capacitance performance of EESDs is strongly determined by their electrode materials. 3 However, a major challenge in the development of EESDs is the regulated preparation of electrode materials with long life, low cost, and high storage capacity. 4 Thus, the synthesis of a wide range of functional materials via facile, eco-friendly, and cost-effective ways can appropriately deal with the challenges related to both current and future strategies.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the solid byproduct (also defined as hydrochar) from HTL and HTG has gained increasing attention. 3,65–67 Regarding HTL, it involves the thermochemical conversion of biomass into biocrude in a hot and pressurized water environment with sufficient residence time. 68 Extensive attention has been paid to bio-crude oils and chemicals from the HTL process, whereas relatively fewer studies have focused on the production of hydrochar.…”

Section: Introductionmentioning

confidence: 99%