Abstract
A new approach using reed pulping black liquor by hydrothermal reaction followed by fast carbonization at 350 degrees C in fluidized bed reactor for 5 minutes was proposed in this paper. The BET specific surface area generated at optimum conditions reached 390 m(2) g(-1). The CO2 selectivity over CH4 and N-2 comparable to commercial activated carbons was obtained. The isosteric enthalpies of adsorption for CO2, CH4 and N-2 on the resultant carbon sample prepared at optimum conditions show surface heterogeneity. The kinetic results indicate its potential for separation of carbon dioxide from carbon dioxide/methane mixture.
Highlights
With the growing demand for paper pulp in developing countries such as China, production of paper using reed as a resource is regarded as one of the most profitable approaches for high-value conversion of biomass due to the shortage of wood-derived resources in China.[1,2] the major technical hurdle of non-wood pulping is the severe environmental pollution caused by the black liquid due to poor performance of alkaline recovery.[3]
The specific surface area of carbons produced from black liquor increases slightly with an increase in hydrothermal temperature, and a maximum BET specific surface area of approximate 100 m2 g–1 was observed at 200 °C
Hydro-BL-200 was carbonized at different temperatures in fluidized bed reactor
Summary
With the growing demand for paper pulp in developing countries such as China, production of paper using reed as a resource is regarded as one of the most profitable approaches for high-value conversion of biomass due to the shortage of wood-derived resources in China.[1,2] the major technical hurdle of non-wood pulping is the severe environmental pollution caused by the black liquid due to poor performance of alkaline recovery.[3]. 2 – BET specific surface area as a function of activation temperature and N2 adsorption/desorption isotherms of different activated carbon samples In addition to the low-pressure adsorption, we measured the high-pressure adsorption equilibrium of methane, carbon dioxide, and nitrogen on RL-350.
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