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J. Hefei Univ. Tech. (Nat. Sci.)

合肥工业大学学报(自然科学版)

JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY (NATURAL SCIENCE)

Competent Authorities: Ministry of Education of the People's Republic of China

Sponsor by: Hefei University of Technology

ISSN 1000-1646, CN 34-1001/N

Experimental study of hydrogen-rich combustible gas production from supercritical water gasification of herbal dregs

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中药渣超临界水催化气化制富氢可燃气实验研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Mar.2026, Vol.49 No.3: 352-359

DOI: 10.3969/j.issn.1003-5060.2026.03.011

Authors

HU Pengju, GONG Miao, CHU Hangyu

(School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: This paper takes herbal dregs as raw material and supercritical water gasification as the main method to investigate the effects of temperature, time, temperature increase rate and water content on the hydrogen production characteristics of supercritical water gasification of herbal dregs. Furthermore, it investigates the catalytic effects of four various kinds of catalysts and four different Lewis acid catalysts on the supercritical water gasification of herbal dregs for the production of hydrogen, and explores the catalytic mechanism of $ AlCl_{3} $ catalyst. The experimental results showed that the change of temperature among the reaction parameters had the greatest influence on the hydrogen production from supercritical water gasification of herbal dregs, and among the four various catalysts, Lewis acid catalysts showed the best catalytic hydrogen production characteristics, and among the four Lewis acid catalysts, $ AlCl_{3} $ had the best catalytic effect on the hydrogen production. The reason why $ AlCl_{3} $ could increase the gas yield and hydrogen production when it was used as an additive was that it not only promoted the C-C bond breaking to accelerate the decomposition of macromolecules into small molecules, but also effectively promoted the free radical reaction, so that small molecules were further gasified into hydrogen and other gas-phase products. In addition, $ AlCl_{3} $ demonstrated better performance in catalytic hydrogen production across four different types of herbal dregs. The results of the study can provide certain theoretical and experimental basis for the supercritical water gasification. tion of herbal dregs to produce hydrogen-rich combustible gas.

Keywords: supercritical water gasification; herbal dregs; hydrogen production; Lewis acid catalyst; $ AlCl_{3} $ catalyst

作者信息

胡鹏举，龚淼，储航宇

（合肥工业大学土木与水利工程学院，安徽合肥230009）

摘要和关键词

摘要: 文章以中药渣为原料, 以超临界水气化为主要方法, 研究温度、时间、升温速率及含水率对中药渣超临界水气化产氢特性的影响, 并考察4种不同类型催化剂和4种路易斯酸催化剂对中药渣超临界水气化产氢的催化效果, 探究 $ AlCl_{3} $催化剂的催化机理。实验结果表明: 反应参数中温度的变化对中药渣超临界水气化产氢影响最大; 4种不同类型催化剂中, 路易斯酸类催化剂表现出最佳的催化产氢特性, 4种路易斯酸催化剂中以 $ AlCl_{3} $的催化产氢效果最佳; $ AlCl_{3} $作为催化剂时能提高总气体产率和 $ H_{2} $产率, 是由于其不仅能促进C—C键断裂来加速大分子有机物分解成小分子有机物, 还能有效促进自由基反应, 使得小分子有机物进一步气化为 $ H_{2} $等气相产物, 此外 $ AlCl_{3} $对4种不同中药渣均表现出较好的催化产氢效果。研究结果可为中药渣超临界水气化制取富氢可燃气提供一定的理论和实验依据。

关键词: 超临界水气化；中药渣；产氢；路易斯酸催化剂； $ AlCl_{3} $ 催化剂

Funding

国家自然科学基金青年科学基金资助项目（52000056）；安徽省自然科学基金资助项目（2408085ME118）

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