Biorefinery development for the conversion of softwood residues into sustainable aviation fuel: Implications from life cycle assessment and energetic-exergetic analyses

Puschnigg, Stefan; Fazeni-Fraisl, Karin; Lindorfer, Johannes; Kienberger, Thomas

doi:10.1016/j.jclepro.2022.135815

Cited by 6 publications

(4 citation statements)

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“…34 The results showed that the life-cycle GHG emissions ranged from 18.7 to 56 gCO 2 eq MJ −1 , depending on the electricity sources and byproduct uses. 34 Several LCA studies assessed different upcycling pathways for paper sludge to lower life-cycle GWP. 20,41−48 For instance, Mohammadi et al quantified the life-cycle environmental impacts of two alternative anaerobic digestion approaches to processing paper sludge.…”

Section: ■ Introductionmentioning

confidence: 98%

“…33 Puschnigg et al conducted an LCA to analyze SAF converted from softwood residues using a proposed pathway of enzymatic hydrolysis, fermentation, purification, oligomerization, and hydrogenation. 34 The results showed that the life-cycle GHG emissions ranged from 18.7 to 56 gCO 2 eq MJ −1 , depending on the electricity sources and byproduct uses. 34 Several LCA studies assessed different upcycling pathways for paper sludge to lower life-cycle GWP.…”

Section: ■ Introductionmentioning

confidence: 98%

“…Life-cycle assessment (LCA) is a standardized tool to evaluate the environmental impacts of a product or a process throughout its life cycle. − LCA has been widely used to quantify the environmental impacts, especially the carbon intensity (or say, life-cycle GHG emissions), of SAF ,,,,− compared to their fossil-based counterparts. For example, Bhatt et al quantified the life-cycle GHG emissions of SAF produced from waste and biomass feedstocks, namely using cooking oil, vegetable oil, fats, municipal solid waste, lignocellulosic and biomass, via three technologies, i.e., HEFA, FT, and ATJ .…”

Section: Introductionmentioning

confidence: 99%

“…This study concluded that SAF produced via the FT pathway had the lowest life-cycle GHG emissions . Puschnigg et al conducted an LCA to analyze SAF converted from softwood residues using a proposed pathway of enzymatic hydrolysis, fermentation, purification, oligomerization, and hydrogenation . The results showed that the life-cycle GHG emissions ranged from 18.7 to 56 gCO 2 eq MJ –1 , depending on the electricity sources and byproduct uses …”

Section: Introductionmentioning

confidence: 99%

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Life-Cycle Assessment of Sustainable Aviation Fuel Derived from Paper Sludge

Lan,

Cruz,

et al. 2024

ACS Sustainable Chem. Eng.

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Converting waste paper sludge to sustainable aviation fuel (SAF) offers a circular economy strategy to decarbonize the aviation sector. This study develops a life-cycle assessment (LCA) for converting high-ash paper sludge to SAF in the U.S. using a catalytic sugar upgrading system that consists of ash removal, enzymatic hydrolysis, dehydration, aldol condensation, and hydroprocessing. The LCA is coupled with a process simulation for an industrial-scale biorefinery based on experimental data. We quantified the carbon intensity as 35.7−41.8 gCO 2 eq MJ −1 SAF (−636 to −584 gCO 2 eq per dry kg paper sludge) with acetone as a solvent, renewable fuel, and biobased chemicals; this is further reduced to 5.1−11.1 gCO 2 eq MJ −1 (−925 to −873 gCO 2 eq per dry kg paper sludge) if ash is recycled and used for substituting cement. Converting 1 dry kg paper sludge to SAF with acetone, renewable fuel, and biobased chemicals (−925 to −584 gCO 2 eq) is more climate beneficial than landfilling without landfill gas recovery (791 gCO 2 eq) and with landfill gas recovery (−294 gCO 2 eq). More than 330 million gallons of SAF can be produced annually (>4 million dry t paper sludge/year in the U.S.), resulting in a reduction of 2−7 million tCO 2 eq.

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Section: ■ Introductionmentioning

confidence: 98%