一种新型宽温加氢转化催化剂的研发

以Co、Mo、Ni为活性组份,La为助剂,r-Al2O3为载体,通过沉淀法制备了NS-3型宽温加氢催化剂。考察了工艺条件对催化剂性能的影响并与工业催化剂JT-201-1进行了对比。进行了1000 h的寿命试验,并对新鲜催化剂和用后的催化剂进行了XRD和BET表征。结果表明:对于φ(乙硫醇)≈200×10-6,φ(C2H4)≈2.6%,φ(噻吩)≈50×10-6的焦炉煤气原料,在350℃~500℃,1.0MPa~2.0MPa,空速2000h-1~6000h-1的反应条件下,其乙硫醇转化率100%,噻吩转化率≥99%,烯烃转化率≥98%,明显优于对比催化剂。催化剂结构稳定,活性稳定性好。     

甲烷制苯Mo/HZSM-5催化剂失活的研究

用ＤＴＡ－ＴＧ研究了Ｍｏ／ＨＺＳＭ－５上甲烷直接制苯的积炭－烧炭特性。用ＸＰＳ、ＮＨ３－ＴＰＤ、比表面测定考察了催化剂在反应前后性质的变化。结果表明，积炭是一个动态过程，催化剂上的酸中心、表面积和孔体积在反应初期下降较快，而后下降趋缓，与积炭量的变化相一致，这初步说明了积炭是从催化剂上的酸中心和微孔中开始进行的；结焦是Ｍｏ／ＨＺＳＭ－５上甲烷直接制苯失活的主要原因。钼的价态变化以及钼组份在反应中流失也是催化剂失活的因素之一。     

Effect of catalyst deactivation on vacuum residue hydrocracking

Accelerated deactivation tests of the pre-sulfided Mo–W/SiO₂–Al₂O₃ commercial catalyst were performed using heavy vacuum petroleum feedstock. High reaction temperature employed in the accelerated catalyst aging resulted in large amounts of carbonaceous deposition with high aromaticity, which was found to be the principal deactivation cause. The effect of catalyst deactivation on hydrocracking of vacuum residue was studied. Experiments were carried out in a batch reactor at 60 bar, feed to catalyst ratio 10:1 and temperature 425 °C. The duration time for a cycle-run was 4 h. On increasing the interval duration times from 4 to 20 h (i.e. five cycles), the quality of the hydrocracked products was decreased. In each cycle-run, a fresh feedstock was used with the same sulfide catalyst. The quality of distillate products, such as hydrodesulfurization (HDS) was decreased from 61.50% to 39.52%, while asphaltene contents of the total liquid product were increased from 2.7% to 5.2% and their boiling ranges were increased during these duration times due to the successive catalyst deactivation during the 5 cycle-runs, caused by successive adsorption of coke formation.     

制备条件对催化剂MoP／HZSM-5临氢芳构化性能的影响

以催化裂化馏分油（50-100℃）为原料,在实验室小型固定床反应装置上考察了制备条件对临氢芳构化催化剂MoP／HZSM-5降烯烃性能的影响。结果表明,采用共浸渍法,优选还原氢气流速为120mL/min,升温速率小于5℃／min,还原终温为650℃,还原压力为1．0MPa时,催化剂MoP／HZSM-5具有较高的活性和稳定性,所得液相产物收率为61．04％,其中烯烃质量分数为7．420％,芳烃质量分数为65．430％。     

Catalytic cracking of vacuum distillate in the presence of oxygen

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 12, pp. 4–5, December, 1990.     

中低馏分油加氢精制催化剂研究进展

论述了中低馏分油加氢精制催化剂的活性组分、载体、制备、活化、再生及工艺操作条件,指出了催化剂的发展方向,提出了一种性能优良的加氢精制催化剂应具备的特征。     

Hydrorefining of distillate raffinates over the GM-85 catalyst

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 7, pp. 12–13, July, 1991.     

Catalytic cracking of heavy crude on a zeolite catalyst

Conclusions The authors study catalytic cracking of the 280–460°C fraction of Upper Cretaceous Chechen-Ingush oil on CaHX zeolite without a binder. The zeolite was 6.6–7.5% more active and 8.4–9.4% more selective than a commercial aluminosilicate catalyst under moderate cracking conditions.The catalytic cracking gases obtained on a zeolite catalyst contain 1.72–3.35 wt. % propylene, 1.76–3.50 wt. % butylenes, and 3.51–5.82 wt. % isobutane (all these contents being percentages of the feedstock).The naphtha fractions contain 45 wt. % of isoparaffins and 26 wt. % of aromatic hydrocarbons.The wide-cut 200–360°C diesel fractions contain (on average) 46.5 wt, % of methanic, 12.5 wt. % of naphthenic, 34 wt. % of aromatic, and 7 wt. % of unsaturated hydrocarbons.Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 7, pp. 9–11, July, 1969.