浆态床FT合成／固定床ZSM－5改质的合成液体燃料工艺的研究和开发

THE SLURRYF FISCHER TROPSCH SYNTHESIS/FlXED-BED ZSM-5REFORMINGPROCESS FOR SYNTHESIS OF LIQUID FUEL

从合成气制取液体燃料的浆态床ＦＴ合成／固定床２ＳＭ－５改质的反应系统由Ⅰ段鼓泡浆液反应器（内径４０ｍｍ，高４５０Ｏｍｍ）和Ⅱ段固定床ＺＳＭ－５反应器（内径４０ｍｍ，高９００ｍｍ）组成，在温度２５０～２８０℃（Ⅰ段），３００～３４０℃（Ⅱ段），压力１．５～２．５ＭＰａ，空速２．０ＮＬ／ｇＦｅ·ｈ（Ⅰ段），５００～１０００ｈ￣－１（Ⅱ段），Ｈ＿２ＣＯ比０．５～１．５和气速１～２ｃｍ／ｓ范围内，考察了工艺参数对反应性能的影响，１０００ｈ以上的寿命试验的平均结果为：合成气单程转化率６５．１％，产率１００ｇ／Ｎｍ￣３（Ｃｏ＋Ｈ＿２），总烃生产达３５０ｇ／Ｆｅ。使用富ＣＯ合成气时，达１１０ｇ／Ｎｍ￣３（ＣＯ＋Ｈ＿２）。实测的ＦＴ合成反应热为２９３８；５ｋＪ／Ｎｍ￣３（ＣＯ＋Ｈ＿２）。长期运转试验表明，工艺流程合理，设备操作和温度控制可靠。采用的浆液循环回路方法可初步分离蜡中的催化剂。

The slurr Fischer-Tropschsynthesis/fixed-bed ZSM-5reforming processhas been developed for producing liquid fuel from syngas,The Bench-Scale Unit(BSU)was composed of purification of feed syngas,reactor system(a bubble column of 40 mm idand 4500 mm height,a fixed-bed of 40 mm id and 900 mm height)and products recovery。The effects of reaction temperature, pressure,space velocity and H_2/CO ratio in the range of250～280℃(lst-stage),300～340℃(2nd-stage),1.5～2.5 MPa,2.0 NL/gFe·h(lst-stage),500-1000h￣-1(2nd-stage),H_2/CO ratio 0.5～1.5 respectively on the reaction per-formance were examined. The duration test of more than 1000 h was successfully ended.The average resuIts of the test were as follows:syngas conversion(one through)65.1%,yield of C2100 g/Nm￣3(CO+H_2),total hydrocarbon production over 350 g/gFe. When CO-rich syngas was used,the yield of reached 110 g/Nm￣3(CO +H_2).Example of materialbalance was given,Heat of reaction for Fischer-Tropsch synthesis,obtained from the heatbalance in a bubble column slurry reactor was 2938.5KJ/Nm￣3(CO+H_2).Some engineeringinformation,such as profile of temperature and catalyst concentration in the bubble column,and change of slurry viscosity,were given,The long term test showed that the performanceof BSU was satisfactory in respect of flow system, operating reliability and temperature con-trol.The preliminary separation of catalvst from the reactor-wax was realized by a slurryrecirculation loop。