煤基费托合成尾气流向变换自热式转化制合成气  

Conversion of the tail gas of coal-based Fischer-Tropsch synthesis into syngas by a novel reverse-flow autothermal reactor

作　　者：高军虎[1] 赵璐琦[1] 郝栩[1] 崔富梅[1] 董根全[1] 徐元源[1] 曹立仁[1] 李永旺[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室

出　　处：《天然气化工—C1化学与化工》2008年第3期1-7,共7页Natural Gas Chemical Industry

基　　金：中科院山西煤炭化学研究所知识创新项目(06SC7919C1);国家杰出青年科学基金项目(20625620)

摘　　要：提出了一种将热交换与反应相结合的流向变换自热反应器用于煤基费托合成尾气转化制合成气。反应器的进料分中间和旁路两处,采用蓄热式换热法回收高温重整气显热用于预热旁路进料。Aspen Plus拟稳态模拟结果表明:调整氧气与费托合成尾气流量比可以得到最大合成气收率,水蒸气从旁路加入能提高甲烷转化率与合成气收率;相比传统的自热重整反应器,它可以使氧耗降低约26%,同时合成气收率增加约9%。有效能分析发现该反应器可以减少反应过程的化学有效能损失。A novel reverse-flow autothermal （RFAT） reactor concept is brought out for the aim of converting tail gas（TG） of coalbased Fischer-Tropseh synthesis into syngas. The RFAT reactor, which has two feeding ports： center-feed and side-feed, can preheat its side-feed by recovering the sensible heat of hot product through high efficient regenerative heat exchange. The thermodynamic analysis results of RFAT reactor using Aspen Plus show that there is a maximum ratio between the side-feed flowrate and total feed flowrate of TG and this maximum ratio decreases with the increasing flowrate ratio of oxygen to TG. The yield of syngas has an optimal value for different flowrate ratios of oxygen to TG . Adding of steam into the side-feed can increase the yield of syngas without increasing oxygen consumption. Compared with conventional ATR reactor, RFAT reactor can reduce oxygen consumption for about 25 percent, and increase the syngas yield about 9 percent. Exergy analysis implies that RFAT reactor can efficiently reduce the chemical exergy loss.

关 键 词：费托合成 合成气 热力学 流向变换 自热重整 有效能分析 

分 类 号：O643[理学—物理化学]