Simulation of hydrogen production from black liquor and papermaking sludge through supercritical water co-gasification coupled with chemical looping

YI Dehao; WANG Qingxia; DAI Jinze; XIONG Qingang

doi:10.11949/0438-1157.20260288

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Simulation of hydrogen production from black liquor and papermaking sludge through supercritical water co-gasification coupled with chemical looping

更新时间：2026-04-24

- Simulation of hydrogen production from black liquor and papermaking sludge through supercritical water co-gasification coupled with chemical looping
- CIESC Journal (2026)
- 作者机构：
  
  1.华南理工大学轻工科学与工程学院，广东广州510641
  2.珠海科创环境资源有限公司，广东珠海519070
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260288
  CLC： TK 91
- Received：06 March 2026，
  
  Revised：2026-04-17，
  
  Accepted：20 April 2026，
- 稿件说明：
移动端阅览
YI Dehao, WANG Qingxia, DAI Jinze, et al. Simulation of hydrogen production from black liquor and papermaking sludge through supercritical water co-gasification coupled with chemical looping[J/OL]. CIESC Journal, 2026.
DOI：

YI Dehao, WANG Qingxia, DAI Jinze, et al. Simulation of hydrogen production from black liquor and papermaking sludge through supercritical water co-gasification coupled with chemical looping[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260288.

摘要

针对制浆造纸工业中黑液 (BL) 和污泥 (PMS)含水率高、常规热化学转化制氢工艺能效低的问题，本文创新提出一种集成超临界水气化与合成气化学链重整的耦合制氢系统，通过超临界水气化直接将高含水率原料转化为合成气，再结合化学链二氧化碳内分离的特性和上下游热流集成管理，在实现系统近自热运行的基础上制备高纯度氢气并捕集二氧化碳。使用Aspen plus构建了全流程热力学模型，探究了系统自热运行的操作窗口，评估了关键参数对氢气产率和系统能效的影响。模拟结果表明，黑液原料含水率为80 wt%时，若气化温度高于600 ℃，需引入辅助燃料供热；在较低的气化温度和原料含水率条件下，系统表现出更好的性能，在气化温度400 ℃且黑液含水率60 wt%的条件下，总能效和㶲效率达到最高，分别为73.96%和62.66%；针对共气化过程，向黑液掺混造纸污泥，掺混比由0提升至50%，研究发现掺混经脱水的造纸污泥可进一步提升系统能效，掺混含水率0 wt%、40 wt%、60 wt%的造纸污泥能效分别提升51.14%、36.86%、19.30%，而直接掺混未脱水的造纸污泥则会导致系统能效降低27.72%。本研究揭示了黑液与造纸污泥超临界水共气化-化学链重整制氢系统的热力学边界和能量分布特性，为其工艺设计和反应器开发提供理论依据。

Abstract

To address the challenges of high moisture content in black liquor (BL) and paper mill sludge (PMS) within the pulp and paper industry

as well as the low energy efficiency of conventional thermochemical hydrogen production processes

this paper innovatively proposes a coupled hydrogen production system integrating supercritical water gasification with syngas chemical looping reforming. This system directly converts high-moisture feedstock into syngas via SCWG and subsequently utilizes the in-situ CO₂ separation characteristics of CLR and upstream-downstream thermal integration to produce high-purity hydrogen and capture carbon dioxide

all while achieving near-autothermal operation. A comprehensive thermodynamic model of the entire process was established using Aspen Plus to investigate the operational windows for autothermal operation and evaluate the impact of key parameters on hydrogen yield and system energy efficiency. Simulation results indicate that with a black liquor moisture content of 80 wt%

the introduction of auxiliary fuel is required for heating if the gasification temperature exceeds 600°C. The system exhibits superior performance under conditions of lower gasification temperature and feedstock moisture content; the total energy efficiency and exergy efficiency reach their maximums of 73.96% and 62.66%

respectively

at a gasification temperature of 400°C and a black liquor moisture content of 60 wt%.Regarding the co-gasification process

increasing the blending ratio of paper mill sludge to black liquor from 0 to 50% revealed that blending dewatered PMS can further enhance system energy efficiency. Specifically

blending PMS with moisture contents of 0 wt%

40 wt%

and 60 wt% improved energy efficiency by 51.14%

36.86%

and 19.30%

respectively

whereas directly blending undewatered PMS resulted in a 27.72% reduction in system energy efficiency. This study elucidates the thermodynamic boundaries and energy distribution characteristics of the black liquor and paper mill sludge supercritical water co-gasification and chemical looping reforming system

providing a theoretical basis for process design and reactor development.

关键词

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references

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