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Varieties of non-noble metal catalysts were prepared and screened by hydrothermal deoxidation of stearic acid for the purpose of efficiently catalyzing the conversion of waste oil into green diesel. The experimental results demonstrated that the nano-Ni-Cu alloy exhibited a significant catalytic effect on stearic acid, with its catalytic performance and product distribution being the most comparable to those of the Pt/C catalyst. Furthermore, the optimization of reaction conditions, stability analysis, catalyst characterization, reaction mechanism exploration and broad-spectrum analysis were carried out for nano Ni-Cu alloy. The characterization results revealed that the structure of nano-Ni-Cu alloy remained stable, and no significant structural changes were observed after continuous cyclic use. Under the optimum reaction conditions of 330℃, 120min, with the addition of 20µL methanol,30mg catalyst and 80µL water in a 1.67ml micro reactor, stearic acid was primarily converted into heptadecane through catalytic hydrodeoxygenation and decarbonylation. Additionally, the broad-spectrum analysis indicated that the yield of C8-C18 alkanes from various fatty acids and fatty acid esters catalyzed by nano-Ni-Cu alloy could exceed 95%, conforming its excellent catalytic performance.
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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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