Valorization of Sargassum tenerrimum: Value addition using hydrothermal liquefaction

Biswas, Bijoy; Fernandes, Alisha C.; Kumar, J.; Muraleedharan, Usha Devi; Bhaskar, Thallada

doi:10.1016/j.fuel.2018.02.153

Cited by 47 publications

(13 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The process was carried out at 260-300 • C; the reaction time was 15 min. The maximum oil yield (16.3 wt%) was obtained at 280 • C. The analysis showed that the content of organic acids in bio-oils decreased with an increase in temperature from 260 to 300 • C [61]. Similar results were obtained by Arun et al [28], Elliott [62], and other authors (see Table 2), but maximum oil yield was a bit higher: for Amphiroa fragilissima oil yield was 28.9% at 320 • C (HHV of the fuel-23.25 MJ/kg) and for Saccharina spp.…”

Section: Using Macroalgae For Biofuel Production In a One-step Processmentioning

confidence: 96%

Review of Studies on Joint Recovery of Macroalgae and Marine Debris by Hydrothermal Liquefaction

et al. 2022

View full text Add to dashboard Cite

At the moment, macroalgae blooms in sea waters, the rotting of which causes greenhouse gas emissions and contributes to the formation of a negative ecological and economic situation in coastal zones, which has become a serious problem. Fuel production through hydrothermal liquefaction (HTL) of macroalgae and marine debris is a promising solution to this ecological problem. The article provides an overview of studies on producing fuel from macroalgae and an assessment of the possibility of their joint recovery with marine debris. The optimal process conditions and their technological efficiency were evaluated. The article shows the feasibility of using heterogeneous catalysis and co-solvent to increase the yield of bio-oil and improve its quality. An assessment of the possibility of joint processing of waste macroalgae and marine debris showed the inexpediency of this direction. The high degree of drift macroalgae contamination also raises the question of the appropriateness of the preliminary extraction of other valuable components for nutrition use, such as fats, proteins, carbohydrates, and their derivatives.

show abstract

Section: Using Macroalgae For Biofuel Production In a One-step Processmentioning

confidence: 96%

Review of Studies on Joint Recovery of Macroalgae and Marine Debris by Hydrothermal Liquefaction

et al. 2022

View full text Add to dashboard Cite

show abstract

“…used a combination of acetone and DCM to extract the bio‐crude products, whereas Biswas et al . used acetone and diethyl ether . Solvent‐free gravity separation was recently used by Elliott et al .…”

Section: Hydrothermal Liquefactionmentioning

confidence: 99%

“…More recently, the conversion of Sargassum tenerrimum has been described . Bio‐crude extraction with a combination of acetone and ether resulted in a maximum bio‐crude yield of 16.6% at 280 °C (residence time 15 min), dropping to 14.7% when temperature was increased to 300 °C.…”

Section: Hydrothermal Liquefactionmentioning

confidence: 99%

“…Over 180 compounds have been identified by GC/MS, including branched and unbranched hydrocarbon ketones (often C 15 –C 33 ), aldehydes, phenols, alkenes, fatty acids, esters, aromatics, and nitrogen and other heterocycles (C 5 –C 16 ), although the exact composition of a given bio‐crude is strongly feedstock dependent . Bio‐crude composition is influenced by reaction temperatures: bio‐crude from S. tenerrimum processed at temperatures ranging from 260 to 300 °C contained a significant contribution from n ‐hexadecanoic acid at 260 °C, which decreased steadily with increasing processing temperature, while the content of 3‐pyridinol peaked at 280 °C …”

Section: Hydrothermal Liquefactionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermal liquefaction of macroalgae for the production of renewable biofuels

Raikova

Allen

Chuck

2019

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

In all biorefinery systems, excess water represents a key challenge, and its removal by drying is often a necessary and crucial pre-treatment. Second-generation feedstocks have often fallen at this hurdle, particularly microalgae-derived biomasses, which require extensive (and costly) dewatering. Hydrothermal liquefaction (HTL) has gained increasing attention in recent years as a technology that uses the water present in the feedstock as a versatile reaction medium, which functions as a solvent, reactant, and catalyst for a cascade of organic reactions. Converting organic biomasses into oil, aqueous, solid, and gas fractions, the development of HTL provides the opportunity to exploit previously unsuitable biomasses in a versatile bio-refinery approach. Marine macroalgae (seaweeds) offer a sustainable source of renewable biomass, which require no land or freshwater to cultivate or harvest. With 70% of the surface of the planet covered in seawater and levels of eutrophication increasing, seaweeds are an underutilized resource with excellent potential for relieving the pressure on fossil resources. Hitherto, this exploitation has been hindered by a lack of suitable and economical processing tools. Here we review the potential for applying HTL to processing marine macroalgae and discuss the potential products and services that can be derived from this potential biorefinery system.

show abstract

“…Among biomass sources, lignocellulosic biomass is the most globally abundant and readily available biomass, and using it as a fuel would maximize the resource use efficiency and contribute to a circular economy. , Biochemical conversion and thermochemical liquefaction conversion, the two most utilized biomass conversion technologies, can efficiently convert biomass feedstock into liquid biofuels. , The thermochemical liquefaction in particular shows the most potential for producing petroleum-alternative liquid biofuels [such as bio-oil and biocrude oil (BO)]. Individual thermochemical liquefaction technologies can be categorized as dry routes, such as pyrolysis liquefaction (PL), and wet routes, such as hydrothermal liquefaction (HTL). − However, the tremendous amounts of water involved in these processes (process water) result in aqueous byproducts, including pyroligneous acid (PA, also named wood vinegar), the postpyrolysis water from PL, , and the hydrothermal aqueous phase (HAP) product, the posthydrothermal wastewater from HTL. , It is worth noting that PA and HAP waste products contain high concentrations of total organic carbon (TOC) and some environmentally toxic compounds, which represent energy losses and require additional treatment before their discharge into the environment. ,, HTL is widely used for treating wet biomass such as algae, sewage sludge, and swine manure due to the nature of its distinct process . Therefore, because the moisture of the naturally dried lignocellulosic materials (e.g., agricultural straw and stalk) is generally 10–13%, large amounts of additional water are required for HTL processing .…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Liquefaction of Cornstalk by Reusing Pyroligneous Acid: Synergistic Effects on Biocrude Oil Formation and Solid Residue Accumulation

Tian

Zhang

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

The reuse of process wastewater as a reaction medium in hydrothermal liquefaction (HTL) of biomass to enhance biocrude oil (BO) production has been investigated, but the interaction between the biomass and process wastewater has rarely been studied. In the present work, pyroligneous acid (PA) was used as the reaction medium and substrate during the HTL process of cornstalk (CS). Hydrothermal conversion of PA itself, HTL of CS with water, and coliquefaction of CS and PA were carried out in a high-temperature and high-pressure batch reactor. Effects of reaction temperature and PA on the yields and characteristics of products were investigated. The PA itself was hydrothermally converted into BO, solid residue (SR), an aqueous phase, and gases. Reaction temperature had a strong influence on the product distribution during the coliquefaction of CS and PA but little influence on products during PA hydrothermal conversion. The highest BO yield from PA hydrothermal conversion occurred at 300 °C (28.96 wt %). For the coliquefaction of CS and PA, the highest experimental BO yield was 31.29 wt % at 300 °C, exceeding its corresponding theoretical value by 3.28 wt %; the experimental SR yield at 350 °C was 13.01 wt %, with the highest increase of 3.34 wt % compared to its corresponding theoretical value. The synergistic effects of CS and PA occurred at high temperatures (300 and 350 °C), promoting BO formation and strengthening SR accumulation, possibly due to the interactions among the compounds dissolved in PA and the components of CS. The BOs obtained from CS and PA coliquefaction had similar C, H, and O contents and higher heating values (HHVs) than those of HTL of CS, suggesting that the reuse of PA in HTL did not compromise the oil quality. Compared with the HTL of CS with water, CS and PA coliquefaction resulted in reduced concentrations of phenols, N-containing compounds, and organic acids and higher concentrations of ketones, alcohols, and hydrocarbons. Hence, PA clearly affected the distribution of organic components in BOs. In addition, more carbonaceous SRs were produced from coliquefaction with C and O contents of 65.

show abstract

Valorization of Sargassum tenerrimum: Value addition using hydrothermal liquefaction

Cited by 47 publications

References 39 publications

Review of Studies on Joint Recovery of Macroalgae and Marine Debris by Hydrothermal Liquefaction

Review of Studies on Joint Recovery of Macroalgae and Marine Debris by Hydrothermal Liquefaction

Hydrothermal liquefaction of macroalgae for the production of renewable biofuels

Hydrothermal Liquefaction of Cornstalk by Reusing Pyroligneous Acid: Synergistic Effects on Biocrude Oil Formation and Solid Residue Accumulation

Contact Info

Product

Resources

About