生物质气催化合成甲醇的研究
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摘要: 在高压微型反应装置上进行了生物质气合成甲醇的研究。利用组成为H2/CO/CO2/N2(体积比)=52.5/21.5/22.8/3.2 的富CO2原料气考察了不同温度、压力和空速条件时甲醇的时空产率和质量分数。结果表明，在所考察的范围内，甲醇的产率和质量分数在260 ℃达到最大。产率和质量分数随反应压力升高而增大，空速增加使产率增大，甲醇的质量分数降低。当p=4 MPa，t=260 ℃，WHSV=5 280 h-1时, 甲醇的时空产率为0.79 g·（mL·h）－１,质量分数为96.2%,与工业合成气相比，分别下降25.8％和1.64％。Abstract: The synthesis of methanol from CO2- rich syngas derived from biomass was carried out in a high pressure micro-reactor system. The effect of temperature, pressure and space velocity on space time yield (STY) and concentration of methanol was studied using a feed gas with H2 (52.5%), CO (21.5%), CO2 (22.8%) and N2 (3.2%). The results show that both STY and concentration of methanol increase with temperature and reaches maximum at 260 ℃, and then decreases. Higher pressure results in higher STY and concentration of methanol. STY increases and methanol concentration decreases under higher space velocity. The STY is 0.79 g·mL-1h-1 and methanol concentration is 96.2% under the conditions of 4 MPa, 260 ℃ and 5 280 h-1. Compared with the results of methanol synthesis using CO-rich industrial syngas, the STY and concentration of methanol decreases by 25.8% and 1.64% respectively. In order to improve efficiency of the whole system, off-gas can be used to produce electricity.
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Key words:
- biomass /
- syngas /
- methanol synthesis
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