Greenhouse gas abatement from sugarcane bioenergy, biofuels, and biomaterials

Renouf, Marguerite

doi:10.1002/9781118719862.ch13

Cited by 4 publications

(5 citation statements)

References 99 publications

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“…Sugarcane has consistently been shown to be amongst the best energy and GHG saver relative to other feedstocks, 4,6,7 but the fi rst-generation pathways (from molasses and cane juice) have potentially signifi cant land use, water use, and water quality trade-off s associated with most fi rst-generation biofuels. 25 In eff ect, sugarcane biofuels can be regarded as the reference case against which to compare other pathways. Th ere have been far fewer LCA studies of algae biofuels, and those available have found that the promise of high productivity has not yet translated into favorable GHG abatement due to its early development status, 26,27 but other environmental considerations have not been well examined.…”

Section: Scenario Descriptionsmentioning

confidence: 99%

Environmental life cycle assessment (LCA) of aviation biofuel from microalgae, Pongamia pinnata, and sugarcane molasses

Cox

Renouf

Dargan

et al. 2014

Biofuels Bioprod Bioref

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The environmental benefi ts and trade-offs of automotive biofuels are well known, but less is known about aviation biofuels. We modeled the environmental impacts of three pathways for aviation biofuel in Australia (from microalgae, pongamia, and sugarcane molasses) using attributional life cycle assessments (LCAs), applying both economic allocation and system expansion. Based on economic allocation, sugarcane molasses has the better fossil energy ratio FER (1.7 MJ out/MJ in) and GHG abatement (73% less than aviation kerosene) of the three, but with trade-offs of higher water use and eutrophication potential. Microalgae and pongamia have lower FER and GHG abatement (1.0 and 1.1; 53% and 43%), but mostly avoid eutrophication and reduce water use trade-offs. All have similar and relatively low land use intensities. If produced on land where existing carbon stocks are not compromised, the sugarcane and microalgae pathways would currently meet a 50% GHG abatement requirement. Based on system expansion, microalgae and pongamia had lower impacts than sugarcane for all categories except energy input, highlighting the positive aspects of these next-generation feedstocks. The low fossil energy conservation potential of these pathways was found to be a drawback, and significant energy effi ciencies will be needed before they can affect fossil energy conservation. Energy recovery from processing residues (base case) was preferable over use as animal feed (variant case), and crucial for favorable energy and GHG conservation. However this fi nding is at odds with the economic 580

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Section: Scenario Descriptionsmentioning

confidence: 99%

Environmental life cycle assessment (LCA) of aviation biofuel from microalgae, Pongamia pinnata, and sugarcane molasses

Cox

Renouf

Dargan

et al. 2014

Biofuels Bioprod Bioref

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“…Sugar cane has played a prominent role in the world economy for centuries, but now a new and promising stage has begun . The main factors that have currently driven the sugar and ethanol (S&E) sector around the world, by improving its efficiency and inducing its modernization, are the incentive to replace fossil fuels with biofuels, the appreciation of sugar and other sugar cane derivatives in the commodities market, and the growth of the alcohol-chemical industry. , Bioethanol, in particular, when compared to fossil fuels, not only has the advantage of being a renewable and sustainable energy but also presents a low environmental impact and, therefore, helps to combat the greenhouse effect and, consequently, the global warming. , In this regard, it is worth mentioning that the carbon dioxide (CO 2 ) emission released into the atmosphere by the bioethanol production process is compensated by the subsequent sugar cane plantations . Simultaneously, all these facts have driven the world’s S&E sector toward modernization and high productivity …”

Section: Introductionmentioning

confidence: 99%

Optimizing the Design and Planning of a Sugar-Bioethanol Supply Chain under Uncertain Market Conditions

Lima

Batista

Relvas

et al. 2023

Ind. Eng. Chem. Res.

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In today's society, the so-called green consciousness about environmental issues has triggered an intense search for renewable energy sources. Bioenergy, obtained by transformation processes of biomass such as castor bean or sugar cane, plays a decisive role in this context, providing much of the energy used in the electricity production, heat supply, and transport sector. Sugar cane, in particular, has assured considerable economic relevance due to its multiple applications. It is commonly employed as fodder for animal feed or as raw material for producing electricity, bioethanol, sugar, molasses, and other bioproducts. Currently, the integrated management of all stages of the transformation processes of this biomass has become a major challenge due to the complex interactivity and exchanges between all the actors present in the logistics chain. In this work, a scenario-based approach built upon a mixed-integer linear programming (MILP) formulation is proposed aiming at designing and planning, under demand uncertainty, a sugar-bioethanol supply chain network whose harvesting, production, storage, and distribution activities are integrated. The model's optimization objective is to maximize the expected net present value (ENPV) when deciding on the location, size, and technologies of industrial parks and storage sites, the size of truck fleets, which markets to serve, and inventory levels, among other important issues. The adequacy and efficiency of the MILP model are illustrated through a case study based on the Brazilian sugar-bioethanol industry.

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“…This type of biofuel has a number of advantages. Firstly, it can be produced from the biomass waste of food production thereby eliminating competition with food crops for agricultural land that is seen in first-generation biofuel [18]. Secondly, it was estimated that the use of sugarcane lignocellulosic biomass could increase bioethanol production by 40% without the expansion of cultivated land [19].…”

Section: Fuel Productionmentioning

confidence: 99%

“…Thirdly, second-generation biofuel has a greater capacity to reduce the carbon footprint compared to first-generation fuels [20]. For instance, the reduction in greenhouse gas emissions compared to petrol for biofuels made from maize is about 60% [18,21] while coproduction of first-and second-generation fuels in a sugarcane mill can reduce greenhouse gas emissions by 94% compared to fossil fuels [22]. Furthermore, an integrated first-and second-generation biofuel plant can be more profitable than the former by itself [23] providing incentive for mills to incorporate second-generation technologies into their operations.…”

Section: Fuel Productionmentioning

confidence: 99%

“…Additionally, as a perennial, sugarcane does not require replanting every year and therefore it has lower cultivation costs than annual crops like maize. These advantages minimize the land and fossil fuels required for cultivation leading to a lower environmental impact and higher net energy ratio for sugarcane compared to other bioenergy feedstocks [18,42]. Moreover, sugarcane is a well-characterized crop with established agronomic practices and breeding programs while crops like Miscanthus sp.…”

Section: Suitability Of Sugarcane As a Dedicated Biomass Cropmentioning

confidence: 99%

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Analysis of biomass traits in sugarcane (Saccharum spp. hybrids)

Hodgson‐Kratky¹

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Sugarcane is a C4 perennial grass able to efficiently convert light energy into biomass. Bagasse, the fibrous waste product of sugar production, and biomass from high-fiber sugarcane varieties are important feedstocks for replacing fossil carbon in the production of fuels and other chemicals.Enzymatic hydrolysis can be used to convert the cellulose and hemicellulose components of the biomass into fermentable sugars. These sugars can then be fermented into ethanol and other chemicals using microbial organisms and catalysts. However, enzymatic hydrolysis is inefficient due to the recalcitrant nature of the secondary cell wall structure in which the cellulose and hemicellulose are located. Costly pretreatments are required to break down this structure prior to enzymatic hydrolysis

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Greenhouse gas abatement from sugarcane bioenergy, biofuels, and biomaterials

Cited by 4 publications

References 99 publications

Environmental life cycle assessment (LCA) of aviation biofuel from microalgae, Pongamia pinnata, and sugarcane molasses

Environmental life cycle assessment (LCA) of aviation biofuel from microalgae, Pongamia pinnata, and sugarcane molasses

Optimizing the Design and Planning of a Sugar-Bioethanol Supply Chain under Uncertain Market Conditions

Analysis of biomass traits in sugarcane (Saccharum spp. hybrids)

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