208 A review of comprehensive application of lignin from black liquor for high-added value product and energy

概要

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Black liquor produced during the pulping process is the main source of serious environmental pollution that pulp industry made. The three dominant components of black liquor are chemicals, lignin and hemicelluloses. In traditional processing method, black liquor is usually burnt to manufacture electricity supporting normal production and recovery alkali to reuse as pulping chemical. However, combustion efficiency of alkali recovery furnace was not high, resulting incomplete combustion of organic material and air pollution. For example, deleterious gas created during combustion bring secondary pollution. New cost-effective ways dealt with the black liquor are called to be found for the requirements of protecting environment and making profit. In this paper, the various situations for high-valued utilization of lignin from black liquor are reviewed, including the process of lignin oxidation into aromatic components and new gasification of black liquor to manufact DME.
2010-06-26