Analytical Techniques and Methods for Biomass by Sílvio Vaz Jr. (eds.)

By Sílvio Vaz Jr. (eds.)

This booklet offers with the applying of recommendations and strategies of chemical research for the examine of biomass and its conversion tactics, aiming to fill the present hole within the publication literature at the subject.

The use of varied options and analytical equipment is gifted and mentioned in an easy demeanour, offering the reader with the potential for picking out the main acceptable methodologies for research of the key sessions of plant biomass and its products.

In the current quantity, a decide upon crew of foreign experts describes various ways to appreciate the biomass constitution, their actual and chemical homes, the parameters of conversion strategies, the goods and by-products formation and quantification, caliber parameters, etc.

Modern chemistry performs a powerful monetary function in business actions in response to biomass, with an expanding development of the significance of its program from the deployment of biorefineries and the rules of eco-friendly chemistry, which utilize the potential for biomass with reducing influence unfavorable environmental. during this context, analytical chemistry can give a contribution considerably to the availability chains of biomass, be it plant or animal starting place; despite the fact that, with the 1st delivering the best demanding situations and the best chance for technical, clinical and fiscal growth, given its different chemical structure. therefore, the chemical research can be utilized to envision the composition for characterizing physicochemical houses and to observe their conversion strategies, with a view to receive higher items and makes use of of biomass.

The caliber of the biomass used determines the product caliber. for this reason, trustworthy details is needed in regards to the chemical composition of the biomass to set up the easiest use (e.g., best suited conversion approach and its conditions), with a view to impact harvest and training steps. Conversion approaches will be monitored for his or her yield, integrity, safeguard, and environmental effect. Effluent or residues might be monitored and analyzed for environmental keep watch over. Co-products must be monitored to prevent interference with the product yield and product purity; although, co-products also are a very good chance so as to add worth to the biomass chain. ultimately, items have to be monitored and analyzed to figure out their yields and purity and to make sure their caliber. during this context, analytical chemistry can give a contribution considerably to the biomass offer chains, be it of plant or animal origin.

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Amongst other characterizations they used TGA to compare the DTG curves of untreated biomass and samples pretreated by hydrothermal processes. The Masse [%] 100 OBL_1 OBL_2 LigSteam 75 50 0 300 Temperatur [°C] Fig. 10 Thermograms of OBL_1, OBL_2 and LigSteam 600 B. El Khaldi-Hansen et al. 34 isolated beech wood lignin shows a DTGmax of 375 °C. Monteil-Rivera et al. (2013) performed thermal analysis on wheat straw lignins and flax lignins. They observed degradation temperatures of 375 °C. 4 Differential Scanning Calorimetry (DSC) DSC is the most common method to determine thermal behavior and glass transition temperatures (Tg) of polymers, also used for various lignins (Glasser 2000).

B. El Khaldi-Hansen et al. 36 curve of LigSteam. Detector Signal OBL_1 OBL_2 13 14 15 16 17 18 19 20 21 Elutions Time [min] Fig. 14 SEC Elugram of OBL_1 and OBL_2 LigSteam 40 35 Detector signal 30 25 20 15 10 5 0 -5 14 15 16 17 18 19 Elution Time [min] Fig. 15 SEC Elugram of LigSteam 20 21 22 2 Qualitative and Quantitative Analysis of Lignins from Different Sources… 37 Fig. 16 Chromatogram of OBL_1 As confirmed by solubility tests a previous acetylation was necessary for the LigSteam sample. 14 shows the chromatogram for the Organosolv-treated and steam-exploded lignin samples.

36 curve of LigSteam. Detector Signal OBL_1 OBL_2 13 14 15 16 17 18 19 20 21 Elutions Time [min] Fig. 14 SEC Elugram of OBL_1 and OBL_2 LigSteam 40 35 Detector signal 30 25 20 15 10 5 0 -5 14 15 16 17 18 19 Elution Time [min] Fig. 15 SEC Elugram of LigSteam 20 21 22 2 Qualitative and Quantitative Analysis of Lignins from Different Sources… 37 Fig. 16 Chromatogram of OBL_1 As confirmed by solubility tests a previous acetylation was necessary for the LigSteam sample. 14 shows the chromatogram for the Organosolv-treated and steam-exploded lignin samples.

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