A kinetic model for the hydrothermal liquefaction of microalgae, sewage sludge and pine wood with product characterisation of renewable crude

Obeid, Reem; Smith, Neil; Lewis, David M.; Hall, Tony; Eyk, Philip J. van

doi:10.1016/j.cej.2021.131228

Cited by 29 publications

(8 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6 wt%) was achieved from HTL of Spirulina algae at 300 °C with the residence time of 30 min [ 34 ], and Obeid et al also achieved a comparable biocrude yield (30 wt%) from HTL of Tetraselmis sp. microalgae at 350 °C, with a residence time of 20 min [ 35 ]. It should be noted that Saba et al observed much lower biocrude yields from the HTL of sludge and manure at 300 °C with 30 min (sludge: about 12 wt% vs. 18.00 wt%; manure: nearly 12 wt% vs. 21.22 wt%) [ 21 ].…”

Section: Resultsmentioning

confidence: 99%

A Comprehensive Hydrothermal Co-Liquefaction of Diverse Biowastes for Energy-Dense Biocrude Production: Synergistic and Antagonistic Effects

Zhang

Wang

Liu

et al. 2022

IJERPH

View full text Add to dashboard Cite

Hydrothermal co-liquefaction (co-HTL) is a promising technology to valorize binary or even ternary biowastes into bioenergy. However, the complex biochemical compositions and unclear synergistic effect prevent the development of this technology. Thus, this study explored a comprehensive co-HTL of representative biowastes to investigate the synergistic and antagonistic effects. An apparent synergistic effect on biocrude yield was observed when sewage sludge was co-liquefied with cow manure or wheat straw. Further, the co-HTL of sewage sludge-cow manure was investigated in a detailed manner. The highest yield (21.84 wt%) of biocrude, with a positive synergistic effect (11.37%), the highest energy recovery (47.48%), and a moderate biocrude HHV (34.31 MJ/kg) were achieved from co-HTL at 350 °C for 30 min. Hydrochar and gas products were also characterized to unravel the reaction pathways. Accordingly, this work indicates that sewage sludge co-liquefied with other biowastes can serve as a multi-purpose solution for biowaste treatment and bioenergy production.

show abstract

Section: Resultsmentioning

confidence: 99%

A Comprehensive Hydrothermal Co-Liquefaction of Diverse Biowastes for Energy-Dense Biocrude Production: Synergistic and Antagonistic Effects

Zhang

Wang

Liu

et al. 2022

IJERPH

View full text Add to dashboard Cite

show abstract

“…Obeid et al 57 later used this same network and associated differential equations to correlate data from HTL of different whole biomass feedstocks ( i.e. , a microalga, sewage sludge, and pine wood sawdust).…”

Section: Kinetic Modelsmentioning

confidence: 99%

Review and assessment of models for predicting biocrude yields from hydrothermal liquefaction of biomass

Guirguis,

Seshasayee,

Motavaf

et al. 2024

RSC Sustain.

View full text Add to dashboard Cite

show abstract

“…For example, FOG (which are nearly 100% lipids) has a high biocrude yield of more than 80% but very low nutrient recovery potential, while gases and hydrochar have been reported to be the main products from carbohydrate-rich feedstocks such as green waste . To better understand the full-scale implications of HTL for waste valorization, several models have been developed to predict HTL performance − and techno-economic analysis (TEA) and life cycle assessment (LCA) studies have examined the economic viability and environmental impacts of hydrothermal waste management systems. Previously, LCAs on cultivated feedstocks such as microalgae have demonstrated the environmental benefits of HTL (e.g., a carbon intensity of −1.2 to 40.1 kg CO 2 eq·MMBTU –1 , − compared to the 101 kg CO 2 eq·MMBTU –1 reported for fossil fuels), but TEAs have demonstrated high feedstock costs (e.g., 331 to 779 $·tonne –1 for microalgae , ) can significantly undermine the financial viability of the integrated feedstock-to-biofuel system (e.g., achieving a minimum fuel selling price [MFSP] of 4.49 to 12.1 $·gal –1 , ,,, compared to the average diesel price of 3.13 $·gal –1 from 2018 to 2022).…”

Section: Introductionmentioning

confidence: 99%

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

Feng,

Li,

Strathmann

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

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.

show abstract

A kinetic model for the hydrothermal liquefaction of microalgae, sewage sludge and pine wood with product characterisation of renewable crude

Cited by 29 publications

References 48 publications

A Comprehensive Hydrothermal Co-Liquefaction of Diverse Biowastes for Energy-Dense Biocrude Production: Synergistic and Antagonistic Effects

A Comprehensive Hydrothermal Co-Liquefaction of Diverse Biowastes for Energy-Dense Biocrude Production: Synergistic and Antagonistic Effects

Review and assessment of models for predicting biocrude yields from hydrothermal liquefaction of biomass

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

Contact Info

Product

Resources

About