Work

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

Year: 2025

Type: article

Abstract: 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/Nm 3 to 10.10 MJ/Nm 3 . 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 2 emissions.

Source: Biotechnology for Biofuels and Bioproducts

DOI: 10.1186/s13068-025-02714-6

Authors: Tian Zhu, Jinzhong Wang, Yanan Li, Ti Liang, Guangzai Nong

Institutions: Guangxi University, Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control

Language: English

Topic: Thermochemical Biomass Conversion Processes

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Affordable and clean energy, Climate action

Open Access status: gold

Estimated APC paid: $2,440