Full
Outline
To address the efficiency bottlenecks in in‑tube methanol reforming for hydrogen production，a design method for structured catalyst supports based on 3D printing technology was proposed.Numerical simulations of heat transfer and fluid flow were conducted at a Reynolds number （Re） of 140 to compare three channel structures：straight channels，zigzag channels，and helical channels.Taking the straight channel as the reference model，the reaction performance was thoroughly investigated，and a numerical calculation model was established （with deviations of ≤5% for methanol conversion and ≤0.6% for CO selectivity）.Structural screening of the three configurations was completed via model predictions and experimental validation.Results indicate that the helical channel exhibits the highest Performance Evaluation Criterion （PEC） value of 14.7.Both methanol conversion and CO selectivity in the methanol reforming reaction increase with increasing temperature and decrease with rising volumetric flow rate.Both model predictions and subsequent screening experiments confirm that the helical channel maintains optimal performance.Specifically，experimental data show that the methanol conversion of the helical structure reaches 65.8%，which is 11.4% and 24.4% higher than that of the zigzag channel and straight channel，respectively.This study provides a theoretical basis for the design of 3D‑printed catalyst supports.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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