Investigating reaction pathways for formic acid and lignin at HTL conditions using 13C-labeled formic acid and 13C NMR

Halleraker, Hilde Vik; Ghoreishi, Solmaz; Barth, Tanja

doi:10.1016/j.rechem.2019.100019

Cited by 10 publications

(13 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…edu.cn; liuyunprivate@sina.com; Fax: +86-10-64416428; Tel: +86-10-64421335 b Beijing Zest Bridge Medical Technology Inc., Beijing 100176, China lignin bio-oil to form carboxylic acids, not a result of a formylation reaction between lignin and FA. 12 The tailor-made lignin fractions from lignocellulose showed various practical applications related to their structural properties. Lignin fraction with high heating value could be applied for thermochemical conversion purposes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural properties and antioxidation activities of lignins isolated from sequential two-step formosolv fractionation

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…5,8,11 However, Halleraker and co-workers convinced that carbon from the FA incorporated in the carbonyl structures of the depolymerized lignin bio-oil to form carboxylic acids, not a result of a formylation reaction between lignin and FA. 12…”

Section: Introductionmentioning

confidence: 99%

Structural properties and antioxidation activities of lignins isolated from sequential two-step formosolv fractionation

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The oil yields are calculated by mass of oil produced relative to input mass of dry, organic feedstock. As formic acid does not contribute signi cantly to the oil yield [30], and ethanol only reacts with speci c hydroxyl substituents [31], those inputs were not included in the yield calculations.…”

Section: Methodsmentioning

confidence: 99%

“…1 as organic compound mass % relative to organic biomass input (on a dry, ash free mass basis). The formic acid is not included in the mass calculations, as previous work demonstrates that very small amounts of formic acid are incorporated into the oil phase product and the major part is converted into the gas product [30].…”

Section: Oil Yieldsmentioning

confidence: 99%

Exploring Hydrothermal Liquefaction (HTL) of Digested Sewage Sludge (DSS) at Laboratory Pilot Scale using Experimental Design

Hegdahl

Ghoreishi

Løhre

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

A common perspective within the prospect of a green future is utilising our waste materials. One waste material of which the world has abundant resources, and where we will keep having resources, is sewage sludge. This waste material is getting an increased focus, and is commonly utilised by anaerobic digestion processes for methane production. This leaves a bioresidue of digested sewage sludge (DSS). In this study, DSS is submitted to hydrothermal liquefaction (HTL) to produce bio-oil. The studied process includes upscaling as well as considering the effects of temperature, reaction medium of water or ethanol, degree of reactor filling and stirring rate. Promising results are found as high oil yields are obtained also after upscaling. The results reported here show that stirring reduces the need of high temperatures during HTL, providing energy savings that are promising for further upscaling. In addition, a total of 18 compounds are identified and semi-quantified, showing an abundance of fatty acids and fatty acid derivatives within the oil, encouraging further studies towards separation of said fatty acids for use as biodiesel.

show abstract

“…The presence of formic acid could either donate active hydrogen atom through decomposition or interact with lignin through a formylation reaction, while the formylation reaction was favored by longer contact time between the reactants during the heating and initial isothermal period. Nevertheless, the incorporation pathway of formic acid into the liquefaction products from lignin was investigated using 13 C-labeled formic acid and 13 C NMR method by Halleraker et al 76 The carbon from formic acid was detected in the carbonyl functional groups of bio-oil, which may not have resulted from the formylation reaction between formic acid and lignin structures. In addition, the amount of formic acid only exhibited a minor effect on the product compositions, whereas the reaction temperature significantly influenced the product compositions on a functional group level.…”

Section: Formic Acid As the In Situ Hydrogen Donormentioning

confidence: 99%

Recent Advances in Hydroliquefaction of Biomass for Bio-oil Production Using In Situ Hydrogen Donors

Zhao

Gao

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

With the rapid growth of energy demand and environmental concerns associated with traditional fossil fuels, renewable and sustainable energy sources have attracted intensive research attention in recent years. Biomass is considered as one of the most promising alternative energy resources due to its many advantages including abundance, renewability, carbon neutrality, and worldwide distribution. Liquefaction is an efficient thermochemical conversion route for the production of bioderived fuels and chemicals under mild reaction conditions. In addition, this process does not require energy-intensive drying as a preprocessing step of the wet biomass feedstocks. Nevertheless, subsequent hydrogenation and upgrading treatment of the bio-oil with high oxygen content are imperative for practical applications mainly for improving the calorific value of the bio-oil. The cost and safety issues of external hydrogen are main obstacles for the liquefaction-upgrading route, which can be somewhat offset by the use of in situ hydrogen. The research on in situ hydrogen generation and use for biomass liquefaction is nascent. Therefore, the latest research developments on hydroliquefaction of biomass feedstocks in the presence of various in situ hydrogen donors are reviewed in this article. Several commonly applied in situ hydrogen donors including formic acid, alcohols (isopropyl alcohol, methanol and ethanol), and zerovalent metals (zinc, aluminum, iron, etc.) are discussed in detail focusing mainly on their influence on the distribution of liquefied products and the mechanisms of hydrogen-donation/hydrogenation reactions. Moreover, future research directions toward the commercial applications of biomass liquefaction technology with in situ hydrogenation strategies are presented.

show abstract

Investigating reaction pathways for formic acid and lignin at HTL conditions using 13C-labeled formic acid and 13C NMR

Cited by 10 publications

References 19 publications

Structural properties and antioxidation activities of lignins isolated from sequential two-step formosolv fractionation

Structural properties and antioxidation activities of lignins isolated from sequential two-step formosolv fractionation

Exploring Hydrothermal Liquefaction (HTL) of Digested Sewage Sludge (DSS) at Laboratory Pilot Scale using Experimental Design

Recent Advances in Hydroliquefaction of Biomass for Bio-oil Production Using In Situ Hydrogen Donors

Contact Info

Product

Resources

About