Global warming and energy yield evaluation of Spanish wheat straw electricity generation – A LCA that takes into account parameter uncertainty and variability

Sastre, Carlos Martín; Arechavala, Yolanda González; Santos, Ana Maria Pereira Bispo dos

doi:10.1016/j.apenergy.2015.05.108

Cited by 37 publications

(15 citation statements)

References 41 publications

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“…A triangular distribution, frequently used in similar studies, for example Machado et al . and Sastre et al ., was assumed when the minimum, maximum a most likely values were available, and when there was no historical data available at no cost to analyze the price fluctuations.…”

Section: Methodsmentioning

confidence: 99%

Bio‐based polymers production in a kraft lignin biorefinery: techno‐economic assessment

Dessbesell

Yuan

Hamilton

et al. 2017

Biofuels Bioprod Bioref

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This paper presents a techno-economic and risk analysis of a kraft lignin (KL) biorefinery (3000 tonne of KL⋅year -1 capacity), where KL is depolymerized to produce depolymerized kraft lignin (DKL) as a bio-substitute to polyol and phenol for the production of bio-based polymers (polyurethane and phenolic resins). Three scenarios were examined: (i) DKL as a phenol substitute, (ii) DKL as a polyol substitute, and (iii) oxypropylated depolymerized kraft lignin (Oxy-DKL) a polyol substitute. The Net Present Value was calculated to compare these scenarios. To address the uncertainty risks in feedstock and product price, a sensitivity analysis and a Monte Carlo simulation were performed. Results show that DKL and Oxy-DKL derived from the KL biorefinery are a feasible bio-substitute for petroleum-based polyols with a minimum selling price of 1440 and 1623 US$⋅t -1 , respectively. However, DKL is likely not feasible when replacing phenol (minimum selling price of 1421 US$⋅t -1 ) due to the current low market price of phenol. The feasibility of the KL biorefinery is highly sensitive to the market prices of the products. Feedstock supply and market demand for lignin-derived biopolyols are still uncertain; therefore, a supply chain design model is necessary for decision-making.

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Section: Methodsmentioning

confidence: 99%

Bio‐based polymers production in a kraft lignin biorefinery: techno‐economic assessment

Dessbesell

Yuan

Hamilton

et al. 2017

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

show abstract

“…In order to calculate life cycle emissions, the system boundaries should be extended so that conversion of the biomass fuel to electricity is included. To this aim, GHG emissions from the biomass transport and subsequent combustion were taken from Sastre et al [47,70], for being based on Spanish conditions. Authors considered a 25 MWe combustion plant, with a conversion efficiency of 29.5%.…”

Section: Factors Influencing Impact Variabilitymentioning

confidence: 99%

Multiyear Life Cycle Assessment of switchgrass ( Panicum virgatum L.) production in the Mediterranean region of Spain: A comparative case study

Escobar

Ramírez-Sanz

Chueca

et al. 2017

Biomass and Bioenergy

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An LCA of switchgrass production in the Mediterranean region of Spain is carried out, from a cradle-to-farm gate perspective. Experimental plots were previously established in two locations, Moncofar and Orihuela, providing inventory data for 2010-2013. This allowed for the environmental performance to be evaluated throughout a 4-year cycle, considering different sources of variability. The functional unit is 1 t of switchgrass (dry basis) for electricity generation. Besides typical impact categories, blue and green water consumption impacts are also addressed by using watershed characterization factors. In 2010, the production in Orihuela is more input-intensive than in Moncofar, while the biomass yield is lower, causing greater impacts (959.4 vs. 95.9 kg of CO2eq•t-1 for climate change or 19.1 vs. 4.7 kg of Fe-eq•t-1 for metal depletion). In the subsequent years, the yields are higher in Orihuela, hence Moncofar performs worse for some specific impact categories (43.9 vs. 28.5 CO2-eq•t-1 or 8.0 vs. 2.4 kg of Feeq•t-1 in 2011). Due to larger irrigation doses in Orihuela, the blue water impact is always higher than that in Moncofar (on average, 1243 vs. 277 m 3 ecosystem-eq. water•t-1). The green water impact is greater in the latter, except for the first year (on average, 6.9 vs. 53.0 m 3 ecosystem-eq. water•t-1). Overall, both locations deliver sufficient greenhouse gas savings throughout the life cycle, in compliance with the EU requirements for bio-electricity production. However, results show that ad hoc decisions on crop management are critical to the environmental impact, evidencing the importance of considering a multi-year LCA approach.

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“…This has been highlighted with recent environmental impacts studies on bioenergy. Djomo et al [4] report the change in soil organic carbon for perennial energy crops to be climate change mitigating, conversely Sastre et al [5] show that loss of carbon of soil carbon is the greatest contributor to the climate change effect of a bioenergy system utilizing wheat straw. It is also one of the conclusions of Yang et al [6] and Parajuli et al [7] that carbon loss from agricultural residue removal is an important contributor to climate change in a bioenergy system.…”

Section: Introductionmentioning

confidence: 99%

Climate effect of an integrated wheat production and bioenergy system with Low Temperature Circulating Fluidized Bed gasifier

et al. 2015

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Global warming and energy yield evaluation of Spanish wheat straw electricity generation – A LCA that takes into account parameter uncertainty and variability

Cited by 37 publications

References 41 publications

Bio‐based polymers production in a kraft lignin biorefinery: techno‐economic assessment

Bio‐based polymers production in a kraft lignin biorefinery: techno‐economic assessment

Multiyear Life Cycle Assessment of switchgrass ( Panicum virgatum L.) production in the Mediterranean region of Spain: A comparative case study

Climate effect of an integrated wheat production and bioenergy system with Low Temperature Circulating Fluidized Bed gasifier

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