Potential value added applications of black liquor generated at paper manufacturing industry using recycled fibers. (15th April 2017) - Al-Kaabi, Zainab
Abstract: Characterization of neutral sulphite semi-chemical black liquor (NSSCBL), sampled from paper manufacturing process that uses recycled fibers as primary feedstock, was carried out for potential bioenergy and biomaterial applications. Physico-chemical characteristics including inorganic elements content, thermogravimetric analysis, GC/MS, and FT-IR are presented. The black liquor of the recycled fibers in the manufacturing process revealed unique characteristics in terms of chemical composition profile compared to the black liquor originating from regular pulp and paper industries. The major findings include the presence of chemical compounds, from a non-plant origin, such as derivatives of hexanedioic acid in significant quantities. The favorable biofuel characteristics of this black liquor are: neutral pH, a higher volatile content, and HHV. The recycled paper NSSCBL can be a good candidate for biomaterial and biofuel applications. Highlights: Black liquor generated using recycled fiber as feedstock are different. Non plant origin component hexanedioic acid derivatives were identified. This material can be processed for extractions and source of bioenergy. Potential for enhancement as fuel by removal of mainly sodium component.