摘要
为使中国汽油达到欧V汽油的含硫标准,研究蒸馏脱硫工艺的可行性有实际意义。以甲基叔丁基硫醚为关键含硫组分,使用Aspen Hysys v 7.0模拟其与MTBE分离过程。按MTBE单塔蒸馏、双塔能量集成蒸馏和与分馏塔能量集成3种方案脱除硫化物,进料硫化物含量100μg/g的条件下,塔顶MTBE含硫化合物1μg/g,3种方案吨产品蒸汽消耗分别为0.233t、0.13t和0.08t。MTBE中含硫化合物与MTBE容易分离,简单精馏可以实现深度脱硫。双塔能量集成方案比单塔直接分离方案节水50%,节约蒸汽45%。MTBE脱硫塔与MTBE分馏塔或催化蒸馏塔进行能量集成,不增加冷却水,蒸汽消耗每吨MTBE增加小于0.1t。辅助塔可以使硫化物浓缩到99%(m/m),MTBE含硫化物30μg/g,可以混兑低硫产品中或循环回分离系统,MTBE几乎无损失。
To reach the Euro V fuel standard in terms of sulfur content,the study of the feasibility of desulfunzation process by distillation was of practical value in China.MTBE desulfurization by distillation was simulated by Aspen Hysys v 7.0,with tert-butyl methyl sulfide as the key sulfur containing compound.Three cases were simulated with regard to one-column simple distillation,two columns at different pressure with energy integration configuration,and high pressure distillation integrating energy with MTBE separation column or with catalytic distillation column.The heating steam consumptions of the three cases were 0.233 ton,0.131 ton and 0.08 ton for 1 ton of MTBE.Sulfide contents in MTBE could be lowered from 100μg/g to 1μg/g.Deep desulfurization could be achieved with simple distillation.The two-column energy integration method saved 50%water and 45%steam compared with one-column direct distillation.The amount of steam required for MTBE per ton increasing by less than 0.1 ton,the energy integration of MTBE desulfurization column with MTBE separation column or with the catalytic distillation column required no extra cooling water.A supplementary column could concentrate bottom sulfide to 99%,with top sulfide in MTBE at 30μg/g,which could be mixed with low-sulfur product or circulated into the separation system.Almost no MTBE was wasted.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2011年第8期991-994,共4页
Computers and Applied Chemistry
关键词
MTBE
脱硫
模拟
能量集成
MTBE
desulfurization
simulation
energy integration
