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Steam methane reforming membrane reactor removes hydrogen through a hydrogen selective permeation membrane, which can promote the forward movement of the reaction, improve methane conversion rate with reduced reaction temperature, and achieve thermochemical storage under mediumtemperature of trough solar collector. However, the characteristics of multiphysical field coupling in the reactor are complex, and the influence of operating parameters on the performance of the reactor needs to be further investigated. The steam methane steam reforming reaction in the membrane reactor driven by solar at mid temperature was taken as the research object in this paper. The multiphysics coupling model of fluid flow, heat/mass transfer and chemical reactions in the reactor was established by using ANSYS FLUENT, and the effects of the key operating parameters (i.e., inlet mass flow rate, temperature, reaction pressure, water to carbon ratio and permeation pressure) on the reactor chemical and thermodynamic performances were studied. The results show that the methane conversion rate and energy efficiency are negatively correlated with the inlet flow rate. The conversion rate of methane is positively correlated with reaction temperature. The energy efficiency first increases and then decreases with the increase of temperature, existing a peak value. When the inlet flow rate is low, the methane conversion rate and energy efficiency increase with the increase of the reaction pressure, while the methane conversion rate and energy efficiency decrease with the increase of reaction pressure when the inlet flow rate is high. The increase of the water to carbon ratio can significantly improve the chemical reaction performance but reduce the energy efficiency. The lower the pressure on the permeation side, the better the reactor performance. The research results are of great significance for highgrade solar thermal utilization.
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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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