H2-rich gas production from gasification of oily sludge via supercritical water technology: Synergy effect of KOH, K2CO3, and reaction parameters

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-09-27 DOI:10.1016/j.cep.2024.110008

Jie Cheng , Seyyed Abbas Nouri Gehraz , Saadi Khodamoradi , Dunya Jani Qali , Dheyaa J. Jasim

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Abstract

Yielding H₂ as a sustainable gaseous fuel from oily sludge is of critical importance in mitigating the environmental effects linked with the usage of conventional fossil fuels. The deficiency in the drying of biomass has ensued to the exploration of supercritical water gasification (SCWG) as an effective method for harvesting H₂-rich gas. This study utilized a combination of two alkali catalysts (KOH and K₂CO₃) in supercritical water to generate a H₂-rich gas from a conventional oily sludge. The Box-Behnken design was utilized to assess the impact of different operational variables, including temperature (400–600 °C), feed concentration (FC) (between 5 and 25 wt.%), residence time (RT) (15–45 min), and catalyst to feed mass ratios (FMR) (0–0.50). The maximum production of H₂ at 3.22 mmolg-feed^-1 was achieved under optimal conditions of 600 °C, 32.76 min, and a KOH to FMR of 0.45 and K₂CO₃ to FMR of 0.28.

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通过超临界水技术气化含油污泥产生富含 H2- 的气体：KOH、K2CO3 和反应参数的协同效应

从含油污泥中提取 H2 作为可持续的气体燃料，对于减轻使用传统化石燃料对环境造成的影响至关重要。由于生物质干燥过程中存在的不足，人们开始探索超临界水气化（SCWG）这一获取富含 H2 气体的有效方法。本研究利用超临界水中两种碱催化剂（KOH 和 K2CO3）的组合，从传统的含油污泥中产生富含 H2- 的气体。采用盒式贝肯设计评估了不同操作变量的影响，包括温度（400-600 °C）、进料浓度（FC）（5-25 wt.%）、停留时间（RT）（15-45 分钟）和催化剂与进料的质量比（FMR）（0-0.50）。在 600 °C、32.76 分钟、KOH 与 FMR 之比为 0.45 和 K2CO3 与 FMR 之比为 0.28 的最佳条件下，H2 的最大产量为 3.22 mmolg-feed-1。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.