Overview of Biomass Conversion Processes and Separation and Purification Technologies in Biorefineries

Huang, Hua Jiang; Ramaswamy, Shri

doi:10.1002/9781118493441.ch1

Cited by 27 publications

(30 citation statements)

References 142 publications

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“…Liquid-liquid extraction (LLE), otherwise known as solvent extraction, is a well-established separation technique to extract desirable component(s) from a liquid feed to a specific solvent (Hanson, 1971;Kertes, 1971;Dechow, 1989;Huang and Ramaswamy, 2013). This process is the most common method used for biodiesel purification that encompasses all the techniques developed for wet washing (Berrios and Skelton, 2008;Veljković et al, 2015).…”

Section: Liquid-liquid Extractionmentioning

confidence: 99%

“…Even though the densities of biodiesel and glycerol (Jaber et al, 2015). Nevertheless, this review categorizes the biodiesel purification methods based on the nature of the process, such as equilibrium-based, affinity-based, membrane-based, solid-liquid, and reaction-based separation processes (Dechow, 1989;Huang and Ramaswamy, 2013) as shown in Figure 1. It should be noted that a proper combination of the purification methods is usually required to obtain a robust biodiesel purification technology (Venkatesan, 2013).…”

Section: Introductionmentioning

confidence: 99%

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A comprehensive review on biodiesel purification and upgrading

2017

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HIGHLIGHTS Various biodiesel purification methods, i.e., equilibrium-based, affinity-based, and reaction-based separation techniques along with membrane technology and solid-liquid separation processes were reviewed.Deoxygenating process via hydrodeoxygenation and decarboxylation/decarbonylation pathways is a common way to upgrade bio-based oils to produce biorenewable diesel with excellent fuel properties. Catalysts and operating conditions, i.e., pressure, temperature, and contact time, are the most important variables in biodiesel upgrading discussed herein. Serious environmental concerns regarding the use of fossil-based fuels have raised awareness regarding the necessity of alternative clean fuels and energy carriers. Biodiesel is considered a clean, biodegradable, and non-toxic diesel substitute produced via the transesterification of triglycerides with an alcohol in the presence of a proper catalyst. After initial separation of the by-product (glycerol), the crude biodiesel needs to be purified to meet the standard specifications prior to marketing. The presence of impurities in the biodiesel not only significantly affects its engine performance but also complicates its handling and storage. Therefore, biodiesel purification is an essential step prior to marketing. Biodiesel purification methods can be classified based on the nature of the process into equilibrium-based, affinity-based, membrane-based, reaction-based, and solid-liquid separation processes. The main adverse properties of biodiesel -namely moisture absorption, corrosiveness, and high viscosity -primarily arise from the presence of oxygen. To address these issues, several upgrading techniques have been proposed, among which catalytic (hydro)deoxygenation using conventional hydrotreating catalysts, supported metallic materials, and most recently transition metals in various forms appear promising. Nevertheless, catalyst deactivation (via coking) and/or inadequacy of product yields necessitate further research. This paper provides a comprehensive overview on the techniques and methods used for biodiesel purification and upgrading. ABSTRACT

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Section: Liquid-liquid Extractionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comprehensive review on biodiesel purification and upgrading

2017

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“…Adsorption and ion exchange are the most common affinity‐based separation methods, also known as dry washing methods for biodiesel purification. In these methods, a suitable adsorbent is used to specifically adsorb certain impurities from the liquid phase onto its surface . In addition, dry washing technique offers several advantages over wet washing, including easiness of integration into an existing plant, shorter purification time, no water consumption and wastewater production, and smaller unit sizes .…”

Section: Affinity‐based Separation Processesmentioning

confidence: 99%

Judicious Recycling of Biobased Adsorbents for Biodiesel Purification: A Critical Review

Alagumalai

Murugesan²

2018

Env Prog and Sustain Energy

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Reusing biomass waste is one objective of environmental sustainability and has turned into a choice to increase the value of producers. Biosorbent, the most fitting illustrative of biomass waste, is as of now acquiring adequate attraction, because of its convenience and potentiality in protection of nature. Affirming the statement, this article presents a cutting‐edge review of different biosorbents in dry cleaning of biodiesel impurities. Moreover, the progress on the preparation of these biodegradable adsorbents, their formidable challenges in concert with the future prospect, has been featured and discussed. Finally, the examination of biomass‐derived adsorbents in the area of adsorption science and technology represents a possible alternative, prompting the widespread change of pollution control. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13077, 2019

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“…In order to separate and purify biofuels, relatively straightforward processes are needed, distillation for bioethanol, centrifugation for biodiesel and CO 2 absorption for methane and hydrogen, yet non‐fuel products may require different and innovative ones (Table ) . Many biorefineries, especially the biochemical and biological approaches, have tremendous challenges in separation and purification due to low feed concentration, product inhibition, and low product yield …”

Section: Bioenergy‐producing Biorefineriesmentioning

confidence: 99%

An overview of the enzyme potential in bioenergy-producing biorefineries

Escamilla‐Alvarado

Perez-Pimienta

Ponce-Noyola

et al. 2016

J. Chem. Technol. Biotechnol.

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Biorefineries are considered as an integrative thinking that focuses on the possibility of obtaining as many added-value products as technically and economically feasible. However, in practice most biorefineries comprise only enzymatic or chemical pretreatment followed by biofuel generation. The drop in oil prices may menace the development of this young industry, as has happened before in history. This has become a fundamental reason for which the biofuel industry should not consider only biofuels production, but enzyme and non-fuel based chemicals as well. Hence, this work aims at overviewing the most important enzymes involved in biotechnological processes and to describe their role in biorefineries. Bioethanol, biogas and biodiesel biorefineries are overviewed, along with the integrated and industrial types. Finally separation and purification processes in biorefineries are discussed.

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Overview of Biomass Conversion Processes and Separation and Purification Technologies in Biorefineries

Cited by 27 publications

References 142 publications

A comprehensive review on biodiesel purification and upgrading

A comprehensive review on biodiesel purification and upgrading

Judicious Recycling of Biobased Adsorbents for Biodiesel Purification: A Critical Review

An overview of the enzyme potential in bioenergy-producing biorefineries

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