137. Acidic surface oxides on carbon

Boehm, H. P.; Diehl, E.; Sappok, R.

doi:10.1016/0008-6223(64)90428-2

Cited by 2 publications

(2 citation statements)

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“…Table 4 lists the acid and base values of the chemically treated ACs. As for the lithium ion adsorption using the ACs from aqueous solution, it was announced in previous studies that the surface functionality is more important than even pore structure [31]. Table 4 indicates that the chemical treatments both H 3 PO 4 and KOH produce a considerable amount of acidic surface groups.…”

Section: Zeta Potential and Functional Groupsmentioning

confidence: 97%

Effect of chemical treatments on lithium recovery process of activated carbons

Jeong

Rhee

Park

2015

Journal of Industrial and Engineering Chemistry

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Section: Zeta Potential and Functional Groupsmentioning

confidence: 97%

Effect of chemical treatments on lithium recovery process of activated carbons

Jeong

Rhee

Park

2015

Journal of Industrial and Engineering Chemistry

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“…To understand the mass gain or loss of the post-hydrolysis residue (PHR), yields of proximate components were calculated using the data obtained from proximate analysis of the PHR and residual solids yield. Post hydrolsate residue samples were also analyzed for its total acid density adopting the procedure employed by Boehm et.al (Boehm et al, 1964). About 0.2 g of the sample was added with 50 mL (V B ) standardized 0.05 M NaOH solution and mixed thoroughly for 24 h at 200 rpm in an incubator shaker.…”

Section: Yields Of Proximate Components and Acid Sites In Phrmentioning

confidence: 99%

Acid Hydrolysis as a Method to Valorize Cellulosic Filter Cake From Industrial Carrageenan Processing

Gontiñas

Cabatingan

et al. 2019

Detritus

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Wastes generated from carrageenan processing industry include cellulosic filter cakes (CFC) which are mainly composed of structural sugar (0.25 w/w) and ash (0.75 w/w, primarily perlite). This study investigated the possible valorization of CFC by recovering the available sugars as glucose through direct acid hydrolysis. Five different sulfuric acid concentrations (5% v/v to 15% v/v) were used as catalyst for hydrolysis done at constant temperature and solvent-to-solid ratio of 95°C and 8 mL/g, respectively, over a reaction time of 5 to 300 minutes, to determine the effect of acid concentration on the hydrolysis yield. The maximum sugar yield achieved was only ~0.06 w/w, corresponding to a recovery of ~24%, for hydrolysis done with 10% v/v sulfuric acid for 120 minutes. Although the amount of sugar recovered was relatively low, hydrolysates obtained have a sugar concentration of ~7 g/L, a level considered adequate for substrates in some fermentation processes. In addition, none of the inhibitory compound, 5-hydroxymethylfurfural, was present in the hydrolysate. Drying of residual solids obtained after hydrolysis was found to result in the sulfonation of the remaining organic fraction, producing a sulfonated residue (with total acid density of 4 to 7 mmol H+/g) which may be used as solid acid catalyst.

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137. Acidic surface oxides on carbon

Cited by 2 publications

References 0 publications

Effect of chemical treatments on lithium recovery process of activated carbons

Effect of chemical treatments on lithium recovery process of activated carbons

Acid Hydrolysis as a Method to Valorize Cellulosic Filter Cake From Industrial Carrageenan Processing

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