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针对传统煤制天然气过程存在的能量利用不合理、碳捕集能耗过高等技术瓶颈,本文探索了一种能实现CO_2零排放的基于化学链燃烧的生物质煤互补天然气动力联产系统。生物质与煤互补从气化源头调节了合成气中H2/CO比例,有利于甲烷化反应过程,化学链燃烧实现了零能耗的CO_2捕集。研究结果表明:系统总能效率(η_(en))为57.03%,效率(η_(ex))为54.65%,系统能源节约率高达18.6%,实现了系统CO_2零排放。分析了关键参数如氧气碳比(O/C)、蒸气碳比(S/C)、生物质煤互补比例和未反应气循环倍率对系统热力学性能的影响。),异辛烷与醇类(包括丙醇、戊醇、己醇、庚醇)的黏度进行了计算,计算结果表明,计算值与实验值之间的总体平均绝对偏差为1.00%,最大偏差为9.75%。
Aimed at the unreasonable energy utilization and the high energy consumption of carbon capture, the paper explores a natural gas cogeneration system based on chemical chain combustion which can realize CO 2 zero emission. The biomass and coal complementarity regulates the H2 / CO ratio in the syngas from the gasification source, which is favorable for the methanation reaction, and chemical chain combustion achieves zero-energy CO2 capture. The results show that the total energy efficiency (η_ (en)) is 57.03%, the efficiency (η_ (ex)) is 54.65%, and the system energy saving rate is as high as 18.6%. The effects of key parameters such as O / C ratio, steam / carbon ratio (S / C), biomass co-enrichment ratio and unreacted gas recirculation ratio on the thermodynamic performance of the system were analyzed. ), Isooctane and alcohols (including propanol, amyl alcohol, hexanol, heptanol) were calculated, the calculation results show that the calculated average value of the overall average deviation between the experimental values of 1.00%, the maximum deviation 9.75%.