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<p>In order to achieve the resource utilization of black liquor and white mud. The new method which the self-steam gasification of black liquor and catalyzed with calcium oxide process is proposed for effectively treating the black liquor and obtaining the syngas and alkali. As results, 1.0&#xa0;kg of SS can generate 0.714&#xa0;kg-0.892&#xa0;kg of syngas with its lower heating value ranging from 15.62&#xa0;MJ/Nm<sup>3</sup> to 10.10&#xa0;MJ/Nm<sup>3</sup>. The solid products produce the regenerated alkaline solution with the causticizing efficiencies in the range of 50.48% to 80.45% after dissolved in water. Meanwhile, this new method can simplify the traditional pulping process. Therefore, it not only enables the resource utilization of the by-products from the pulping production process, but also reduces the energy consumption of alkali recovery and CO<sub>2</sub> emissions.</p>

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Generation of syngas and sodium hydroxide by self-steam gasification of black liquor and catalyzed with calcium oxide derived from white mud

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月25日

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  • Tian Zhu,
  • Jinzhong Wang,
  • Yanan Li,
  • Ti Liang,
  • Guangzai Nong

摘要

In order to achieve the resource utilization of black liquor and white mud. The new method which the self-steam gasification of black liquor and catalyzed with calcium oxide process is proposed for effectively treating the black liquor and obtaining the syngas and alkali. As results, 1.0 kg of SS can generate 0.714 kg-0.892 kg of syngas with its lower heating value ranging from 15.62 MJ/Nm3 to 10.10 MJ/Nm3. The solid products produce the regenerated alkaline solution with the causticizing efficiencies in the range of 50.48% to 80.45% after dissolved in water. Meanwhile, this new method can simplify the traditional pulping process. Therefore, it not only enables the resource utilization of the by-products from the pulping production process, but also reduces the energy consumption of alkali recovery and CO2 emissions.