Quantitative Isolation of Hemicelluloses and Summative Analysis of Wood

Wise, Louis E.; Ratliff, Evelyn K.

doi:10.1021/ac60007a010

Cited by 52 publications

(22 citation statements)

References 13 publications

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“…The holocellulose contents were determined as described previously 19. Ash content was determined according to ASTM D1102‐84 standard test method.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the phytomass source for composite preparation

Simkovic

Šurina

Mikulášik

et al. 2012

J of Applied Polymer Sci

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The properties of lignocellulose materials from the trunk and bark of trees, and from agricultural sources were investigated by thermogravimetry (TG) and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The goal was to learn which of the phytomass sources is the most accessible to dehydration and aldol reactions, and in this way could be considered suitable for composite preparation by the thermal pressing treatment. The bagasse second differential thermal analysis peak in air is at the highest temperature acceptable for intermolecular dehydration/crosslinking, and therefore we consider bagasse to be the most suitable candidate for composite preparation. From the TG results in air at 250 C, it follows that willow wood and bagasse are the most thermally resistant sources. The data obtained by Py-GC/MS analysis showed glycolaldehyde and acetic acid as dominant markers related to adhesion properties via aldol condensation. The detected sum amount of glyceraldehyde and acetic acid decreases in the order: beech wood > bagasse > acacia wood > sugar beet pulp, whereas the remaining species produced much less of it. By comparing results run at above conditions with composite preparation using the pressing thermal treatment at a temperature of 150 C and pressures up to 800 kPa, the suggested evaluation was examined for application on sugar beet residue.

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“…The holocellulose contents were determined as described previously 19. Ash content was determined according to ASTM D1102‐84 standard test method.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the phytomass source for composite preparation

Simkovic

Šurina

Mikulášik

et al. 2012

J of Applied Polymer Sci

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“…Part of remaining material was treated with Na-chlorite and acetic acid at elevated temp. to give cellulose and holocellulose (Wise et al, 1946). Results will be discussed by Assarsson and Olsson.…”

Section: Acknowledgmentsmentioning

confidence: 95%

Uppsala Natural Radiocarbon Measurements IX

1969

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The following list covers some old measurements not included in previous lists and most of the samples measured at the Uppsala C14 laboratory since the last list (Radiocarbon, 1967, v. 9, p. 454-470); samples utilized for determining the increase of the C14/C12 ratio clue to explosion of nuclear devices are omitted.The technique used is mainly the same as previously described by Olsson (1958) with changes given in Radiocarbon, 1967, v. 9, p. 454. Pretreatment of samples is mainly that which has been used earlier (Radiocarbon: 1964, .v. 6, p. 291; 1967, v. 9, p. 454 where 8014 is the age-corrected C14 deviation from the reference sample in per mil in the year A.D. 1950, and 8013 is the deviation from PDB standard in per mil. Errors include standard deviation (Q) of counted particles and errors in corrections due to the C13/C12 ratio, filling pressure, temperature, working voltage, barometric pressure etc. as described by Olsson (1965, 1966). When measured activity is lower than zero, 2 Q has been used for calculation of minimum age. When it is between zero and 2 Q, net activity is increased by 2 for calculation of minimum age. Since the results are presented as physical measurements, no terms are included for the error in the half-life or previous C14/C12 variations.

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“…The chemical component analysis methods were conducted according to TAPPI Test Method T 264 cm-97 for moisture content [10], TAPPI Test Method T 211 om-02 for ash content [11], TAPPI Test Method T 204 cm-97 for extractive content [12], NREL LAP 003 for acid insoluble lignin [13], the Wise method for holocellulose [14], and the Rowell, et al method for α-cellulose [15]. The hemicellulose content was calculated by subtraction of α-cellulose from holocellulose.…”

Section: Chemical Component Analysis Of Opefbmentioning

confidence: 99%

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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Abstract. Developing an effective pretreatment for the conversion of lignocellulosic biomass to ethanol is an important effort in reducing the cost of this process. Microwave-assisted pretreatment is considered a green technology that can effectively break down lignocellulosic structures. The objective of this study was to investigate the most effective temperature for microwave-assisted oxalic acid pretreatment regarding the structural characteristic changes of oil palm empty fruit bunches (OPEFB) fibers. The fibers were subjected to microwave-assisted oxalic acid pretreatment at 160-200 °C with 2.5 minutes heating time and a liquid to solid ratio of 10. The effectiveness of the pretreatment was determined based on its delignification selectivity, morphological characteristics, and functional group changes. Microwave irradiation of OPEFB fibers at 180 ºC was effective in increasing the cellulose content by 24%. This pretreatment resulted in 1.82 delignification selectivity. More than 50% of the hemicellulose of the OPEFB was removed after this treatment, which was confirmed by a decrease of the absorption bands of functional groups at 1732 cm -1 . The increase of pretreatment temperature disrupted the morphological structure of the OPEFB and removed its hemicellulose but did not change its functional groups and lignin content.

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Quantitative Isolation of Hemicelluloses and Summative Analysis of Wood

Cited by 52 publications

References 13 publications

Evaluation of the phytomass source for composite preparation

Evaluation of the phytomass source for composite preparation

Uppsala Natural Radiocarbon Measurements IX

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

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