Adsorption Removal of Inhibiting Compounds by Modified Activated Carbon

Ma, Hao

doi:10.11648/j.jenr.20170602.12

Cited by 14 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other approaches for 5-HMF removal such as over-liming, activated carbon, zeolites and ion exchange resins selectively removed up to 85% of 5-HMF (Ezeji et al, 2007; Hodge et al, 2009; Jin et al, 2015; Ma et al, 2017). However, the recovery of 5-HMF from these extraction substrates is either difficult or unfavorable for downstream processing into 2,5-DMF due to high intramolecular attraction between 5-HMF and the extraction substrates or the regenerant/eluting agents containing water or water miscible organic solvents (Liu et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Upconversion of Cellulosic Waste Into a Potential “Drop in Fuel” via Novel Catalyst Generated Using Desulfovibrio desulfuricans and a Consortium of Acidophilic Sulfidogens

et al. 2019

View full text Add to dashboard Cite

Biogas-energy is marginally profitable against the “parasitic” energy demands of processing biomass. Biogas involves microbial fermentation of feedstock hydrolyzate generated enzymatically or thermochemically. The latter also produces 5-hydroxymethyl furfural (5-HMF) which can be catalytically upgraded to 2, 5-dimethyl furan (DMF), a “drop in fuel.” An integrated process is proposed with side-stream upgrading into DMF to mitigate the “parasitic” energy demand. 5-HMF was upgraded using bacterially-supported Pd/Ru catalysts. Purpose-growth of bacteria adds additional process costs; Pd/Ru catalysts biofabricated using the sulfate-reducing bacterium (SRB) Desulfovibrio desulfuricans were compared to those generated from a waste consortium of acidophilic sulfidogens (CAS). Methyl tetrahydrofuran (MTHF) was used as the extraction-reaction solvent to compare the use of bio-metallic Pd/Ru catalysts to upgrade 5-HMF to DMF from starch and cellulose hydrolyzates. MTHF extracted up to 65% of the 5-HMF, delivering solutions, respectively, containing 8.8 and 2.2 g 5-HMF/L MTHF. Commercial 5% (wt/wt) Ru-carbon catalyst upgraded 5-HMF from pure solution but it was ineffective against the hydrolyzates. Both types of bacterial catalyst (5wt%Pd/3-5wt% Ru) achieved this, bio-Pd/Ru on the CAS delivering the highest conversion yields. The yield of 5-HMF from starch-cellulose thermal treatment to 2,5 DMF was 224 and 127 g DMF/kg extracted 5-HMF, respectively, for CAS and D. desulfuricans catalysts, which would provide additional energy of 2.1 and 1.2 kWh/kg extracted 5-HMF. The CAS comprised a mixed population with three patterns of metallic nanoparticle (NP) deposition. Types I and II showed cell surface-localization of the Pd/Ru while type III localized NPs throughout the cell surface and cytoplasm. No metallic patterning in the NPs was shown via elemental mapping using energy dispersive X-ray microanalysis but co-localization with sulfur was observed. Analysis of the cell surfaces of the bulk populations by X-ray photoelectron spectroscopy confirmed the higher S content of the CAS bacteria as compared to D. desulfuricans and also the presence of Pd-S as well as Ru-S compounds and hence a mixed deposit of PdS, Pd(0), and Ru in the form of various +3, +4, and +6 oxidation states. The results are discussed in the context of recently-reported controlled palladium sulfide ensembles for an improved hydrogenation catalyst.

show abstract

Section: Resultsmentioning

confidence: 99%

Upconversion of Cellulosic Waste Into a Potential “Drop in Fuel” via Novel Catalyst Generated Using Desulfovibrio desulfuricans and a Consortium of Acidophilic Sulfidogens

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Figure (A) shows the chemical principle of this method, which is based on the functional groups present on the surface of the charcoal (carbonyls and carboxyl), which can form ionic bonds with the phenolic and furfural compounds present in the hydrolysates. However, this method depends on different variables, such as pH, temperature, contact time, and activated carbon . Hydrophobic resins and polymers, such as IRA‐400 (OH), XAD‐4, IRA‐400 (Cl) and IRA 958 (Cl), are also widely used for the removal of these compounds.…”

Section: Technologies For Inhibitor Removal From Hydrolysatesmentioning

confidence: 99%

Challenges in lipid production from lignocellulosic biomass using Rhodosporidium sp.; A look at the role of lignocellulosic inhibitors

Osorio‐González

Hegde

Brar

et al. 2018

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

The use of lignocellulosic biomass biofuels is an attractive alternative because they do not put food safety at risk, they are a renewable source, and their use is limited. The use of microorganisms has now become more widespread to take advantage of the carbohydrates present in this raw material (cellulose and hemicellulose) and the products of its hydrolysis (glucose, xylose, arabinose, galactose, and mannose). The fatty acids obtained from oleaginous microorganisms are potential sources for the production of drop‐in biofuels. Rhodosporidium sp. is an oleaginous yeast that accumulates up to 70% of its biomass in the form of lipids and is highly adaptable to different types of substrates. This review discusses the different factors and challenges (genetic modification of strains, pretreatments, and inhibitor effects) in obtaining lipid from lignocellulosic biomass using Rhodosporidium sp. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd

show abstract

“…A significant advantage of activated carbon is that its use does not significantly change the amount of fermenting sugars obtained during the pretreatment [27]. Ma et al [28] investigated the possibility of using modified activated carbon to limit the amount of carboxylic acids and phenolic compounds. Zhang et al [29] evaluated the effect of the use of adsorption on activated carbon on the effective purification of the hydrolyzate from toxic compounds.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Detoxification of Lignocellulosic Biomass for Enhanced Methane Production

2021

View full text Add to dashboard Cite

The aim of this research is to examine the effect of lignocellulosic biomass detoxification on the efficiency of the methane fermentation process. Both for corn straw and rye straw, the methane yield was expressed per volume of fermentation medium and per mass of volatile solids (VS) added. Lignocellulosic biomass was subjected of thermo-chemical and enzymatic sequential pretreatments. It was found that methane yield was higher by 22% when using the detoxification process. In these variants, CH4 yield was 18.86 L/L for corn straw and 17.69 L/L for rye straw; while methane yield expressed per mass of VS added was 0.31 m3/kg VS for corn straw and 0.29 m3/kg VS for rye straw. The inclusion of a detoxification step in pretreatments of biomass lignocellulosic increases the degree of organic substance decomposition and enhances methane yield. The results show that a two-step pretreatment, alkaline/enzymatic with a detoxification process, is necessary for the effective generation of high methane concentration biogas.

show abstract

Adsorption Removal of Inhibiting Compounds by Modified Activated Carbon

Cited by 14 publications

References 8 publications

Upconversion of Cellulosic Waste Into a Potential “Drop in Fuel” via Novel Catalyst Generated Using Desulfovibrio desulfuricans and a Consortium of Acidophilic Sulfidogens

Upconversion of Cellulosic Waste Into a Potential “Drop in Fuel” via Novel Catalyst Generated Using Desulfovibrio desulfuricans and a Consortium of Acidophilic Sulfidogens

Challenges in lipid production from lignocellulosic biomass using Rhodosporidium sp.; A look at the role of lignocellulosic inhibitors

The Effect of Detoxification of Lignocellulosic Biomass for Enhanced Methane Production

Contact Info

Product

Resources

About