摘要
在５２４Ｋ、２．３１ＭＰａ、１８４５ｈ（－１）、Ｈ２／ＣＯ＝２．１的条件下考察了合成气中ＣＯＳ对ＦＴ合成催化剂活性及产物分布的影响。结果表明，随着催化剂中硫含量的增加，尾气中ＣＯ２、ＣＨ４含量减少，ＣＯ含量增加。催化剂中毒后，甲烷选择性明显提高，Ｃ５＋重量百分含过降低，气态Ｃ２～Ｃ４烃增加，产物向低碳烃方向移动。油相和水相的产物分析结果表明，催化剂中毒后，产物中含氧化合物增加，液态烃中烯烃减少，正构烷烃和异构烷烃增加。当硫含量达１１．３２ｍｇＳ／ｇＣａｔ．时，催化剂的活性为新鲜催化剂的一半。中毒后产物中ＣＯ２／Ｈ２Ｏ摩尔比和ＣＯ２选择性均降低，但Ｈ２／ＣＯ利用比几乎不变。
The effect of COS in synthesis gas on the activity in the Fischer-Trol:ssch (FT) synthesiswith an hourly space velocity of i 845 and the operating pressure of 2. 31 MPa at 524K in H,ICO feed ratioof 2. I containing 350. 8m8 of sulfur as COS was investisated. The results showed that the contents of COzand CH` in the exit gases decreased with increasing sulfur fed to catalyst ,and the content of CO increased.The selectivity to CH` significantly increased when the catalyst was poisoned by COS. The Cs+ weight content in preduct decreased , and the saseous Cz￣C` hydrocarbons increased. This trend indicates that prixluctdistribution shifts to the lishter hydrocarbons- The activity decreased to half when 1 1. 32m8 of s'ulfur pergrani of catalyst had been intreduced. The oxysenates formed in products incraseed ￣￣ the sulfur fed to thecatalyst was increased. The COzlHzO ratio and the selectivity to COz all decreased with increasing sulfur fedto catalyst.
出处
《合成化学》
CAS
CSCD
1995年第1期70-74,共5页
Chinese Journal of Synthetic Chemistry
关键词
FT合成
催化剂
硫中毒
羰基硫
煤气
Fischer-Trops'ch synthesis, CO+Hz , COS , Fe-Cu-K catalyst, Preduct distribution, Sul-fur poisoning.
