Analytical pyrolysis (Py-GC/MS) on mg-scale of Norway spruce (Picea abies)-derived kraft lignin, ethanosolv and dried lignin-rich soda-anthraquinone (AQ) black liquors was studied at 500 °C to compare the valorization potential these materials, focusing type yield condensable products. Of particular interest relatively selective formation guaiacol (2-methoxyphenol) from soda-AQ in contrast comp...

Lignin is considered as nature's most abundant aromatic polymer co-generated during papermaking and biomass fractionation. There are different types of lignins depending on the source (hardwood, softwood, annual crops, etc.) and recovery process. Recently, an emerging class of lignin products, namely sulphur-free lignins, from biomass conversion processes, solvent pulping and soda pulping, have...

soda and soda-aq pulping of corn stalk applying different charges of active alkali and pulping time was studied. the average value of fiber length, diameter and cell wall thickness were measured as 1.03 mm, 23.64 µm and 5.26 µm, respectively. the content of alcohol-acetone extractives, cellulose, lignin, extractives soluble in 1% naoh and ash content of corn stalk were determined as 15%, 51.2%,...

Three selected alkali-based organosolv pulps (alkali-sulfite-anthraquinone-methanol (ASAM), alkali-anthraquinone-methanol (organocell) and ethanol-soda) from agrofibre crop giant reed (Arundo donax L.) were bleached by an ozone-based TCF (totally chlorine- free) bleaching sequence AZE(R)QP (where A is an acidic pulp pre-treatment, Z is an ozone stage, (E(R)) is an alkaline extraction in the pre...

The current study investigated to which extent phenol could be replaced by lignins produce lignin formaldehyde (LPF) resins, utilising soda and sodium lignosulphonate as by-products from the South African pulping industry. were characterised indicated highest reactivity. It was therefore utilised LPF resins at 60%, 80%, 100% substitution, using central composite designs maximise adhesive streng...

Determination of the chemical composition biomaterial is important for their valued utilization in biorefinery. In this study, seven wood species, i.e. lambu (Khaya anthotheca), raj-koroi (Albizia richardiana), jhau (Casuarina equisetifolia), sil-koroi procera), katbadam (Terminalia catappa), jolpai (Elaeocarpus robustus), and arjun arjuna) were examined. The characterization these species can ...