Glycerol Transformation to Value-Added 1,3-Propanediol Production: A Paradigm for a Sustainable Biorefinery Process

Samudrala, Shanthi Priya

doi:10.5772/intechopen.83694

Cited by 14 publications

(10 citation statements)

References 65 publications

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“…Although glycerol is a very versatile chemical substance with more than 1000 uses and applications in food products, cosmetics, toiletries and medicines, [2] it can also be transformed into higher value-added products such as ethylene or propylene glycols (1,2-propanediol and 1,3propanediol) by catalytic hydrogenolysis [3]. For instance, 1,2-propanediol is used in water-based acrylic architectural paints to extend drying time due to its slower evaporation rate compared to water [4] and as a humectant, solvent and preservative in food and for tobacco products. It is used in a variety of consumer products such as coffee beverages, liquid sweeteners, ice cream, whipped dairy products and soft drinks, and as a solvent in many pharmaceutical products, including oral, injectable and topical preparations, such as diazepam and lorazepam, which are insoluble in water [5].…”

Section: Introductionmentioning

confidence: 99%

Self-Assembled Hybrid ZnO Nanostructures as Supports for Copper-Based Catalysts in the Hydrogenolysis of Glycerol

Omar

Perret²,

Danièle³

2021

Catalysts

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This study describes the use of new ZnO/PAAH hybrid nanomaterials (PAAH = polyacrylic acid) as copper catalyst supports for the hydrogenolysis of glycerol. A study of the synthesis parameters (washing process, temperatures of synthesis and calcination) of these hybrid supports has allowed us to vary their morphology and specific surface area and ultimately the sizes and dispersion of the copper nanoparticles, and to perform a general analysis of their effects on the catalytic performance of the materials. All catalysts were synthesized by the urea deposition-precipitation method (DPU) and were fully characterized to establish a structure–activity relationship. Optimization of the synthesis and catalytic conditions allowed remarkable yields/conversions of the order of 70% for selectivities in 1,2 propanediol of 90%.

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Section: Introductionmentioning

confidence: 99%

Self-Assembled Hybrid ZnO Nanostructures as Supports for Copper-Based Catalysts in the Hydrogenolysis of Glycerol

Omar

Perret²,

Danièle³

2021

Catalysts

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“…PDO shown in Figure 1C is used as an important monomer in the manufacture of polytrimethylene terephthalate (PTT) or polypropylene terephthalate, a biodegradable polyester used in textile and carpet manufacturing. Global PDO production is estimated to reach $ 621.2 million by 2021 and is growing at an annual growth rate of 10.4% [40]. Figure 1B shows BDO, also known as dimethylene glycol or 2,3-butylene-glycol, is synthesized as a product of mixed-acid fermentation [41].…”

Section: Introductionmentioning

confidence: 99%

Poly(vinyl alcohol)-Based Biofilms Plasticized with Polyols and Colored with Pigments Extracted from Tomato By-Products

et al. 2020

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In the current work the physicochemical features of poly(vinyl alcohol) (PVOH) biofilms, enriched with eco-friendly polyols and with carotenoid-rich extracts, were investigated. The polyols, such as glycerol (Gly), 1,3-propanediol (PDO), and 2,3-butanediol (BDO) were used as plasticizers and the tomato-based pigments (TP) as coloring agents. The outcomes showed that β-carotene was the major carotenoid in the TP (1.605 mg β-carotene/100 DW), which imprinted the orange color to the biofilms. The flow behavior indicated that with the increase of shear rate the viscosity of biofilm solutions also increased until 50 s−1, reaching values at 37 °C of approximately 9 ± 0.5 mPa·s for PVOH, and for PVOH+TP, 14 ± 0.5 mPa·s in combination with Gly, PDO, and BDO. The weight, thickness, and density of samples increased with the addition of polyols and TP. Biofilms with TP had lower transparency values compared with control biofilms (without vegetal pigments). The presence of BDO, especially, but also of PDO and glycerol in biofilms created strong bonds within the PVOH matrix by increasing their mechanical resistance. The novelty of the present approach relies on the replacement of synthetic colorants with natural pigments derived from agro-industrial by-products, and the use of a combination of biodegradable polymers and polyols, as an integrated solution for packaging application in the bioplastic industry.

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“…The system chosen was one of the most promising, i.e., limonene:1,2,3-propanetriol, to remove the orange pigment from HDPE. This choice was based on the cost of the antisolvent, since 1,2,3-propanetriol (glycerol) is one of the main by-products of the biodiesel industry [ 48 ], being cheaper than other alcohols such as 1,2,4-butanetriol [ 49 , 50 ].…”

Section: Resultsmentioning

confidence: 99%

Pretreatment of Plastic Waste: Removal of Colorants from HDPE Using Biosolvents

et al. 2021

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Plastics recycling remains a challenge due to the relatively low quality of the recycled material, since most of the developed recycling processes cannot deal with the additives present in the plastic matrix, so the recycled products end up in lower-grade applications. The application of volatile organic solvents for additives removal is the preferred choice. In this study, pretreatment of plastic packaging waste to remove additives using biosolvents was investigated. The plastic waste used was high-density polyethylene (HDPE) with blue and orange colorants (pigment and/or dye). The first step was to identify the type of colorants present in the HDPE, and we found that both plastics presented only one colorant that was actually a pigment. Then, limonene, a renewable solvent, was used to solubilize HDPE. After HDPE dissolution, a wide range of alcohols (mono-, di-, and tri-alcohols) was evaluated as antisolvents in order to selectively precipitate the polymer and maximize its purity. The use of limonene as solvent for plastic dissolution, in combination with poly-alcohols with an intermediate alkyl chain length and a large number of hydroxyl (OH) groups, was found to work best as an antisolvent (1,2,3-propanetriol and 1,2,4-butanetriol), leading to a removal of up to 94% and 100% of the blue and orange pigments, respectively. Finally, three cycles of extraction were carried out, proving the capability of the solvent and antisolvent to be recovered and reused, ensuring the economic viability and sustainability of the process. This pretreatment provides a secondary source of raw materials and revenue for the recycling process, which may lead to an increase in the quality of recycled polymers, contributing to the development of an economical and sustainable recycling process.

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Glycerol Transformation to Value-Added 1,3-Propanediol Production: A Paradigm for a Sustainable Biorefinery Process

Cited by 14 publications

References 65 publications

Self-Assembled Hybrid ZnO Nanostructures as Supports for Copper-Based Catalysts in the Hydrogenolysis of Glycerol

Self-Assembled Hybrid ZnO Nanostructures as Supports for Copper-Based Catalysts in the Hydrogenolysis of Glycerol

Poly(vinyl alcohol)-Based Biofilms Plasticized with Polyols and Colored with Pigments Extracted from Tomato By-Products

Pretreatment of Plastic Waste: Removal of Colorants from HDPE Using Biosolvents

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