[1]刘淼a,于浩a,郭靖b.铁中毒催化剂的表征及其对催化裂化装置的影响[J].石化技术与应用,2024,6:436-440.
LIU Miaoa,YU Haoa,GUO Jingb.Characterization of iron-poisoning catalyst and its influence on fluid catalytic cracking unit[J].Petrochemical technology & application,2024,6:436-440.
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铁中毒催化剂的表征及其对催化裂化装置的影响(PDF)
《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]
- 期数:
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2024年6期
- 页码:
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436-440
- 栏目:
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- 出版日期:
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2024-11-10
文章信息/Info
- Title:
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Characterization of iron-poisoning catalyst and its influence on fluid catalytic cracking unit
- 文章编号:
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1009-0045(2024)06-0436-05
- 作者:
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刘淼a; 于浩a; 郭靖b
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中国石油辽阳石化公司 a.油化部; b.研究院,辽宁 辽阳 113001
- Author(s):
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LIU Miaoa; YU Haoa; GUO Jingb
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a. Petrochemical Department; b. Research Institute,Liaoyang Petrochemical Company,PetroChina,Liaoyang 113001,China
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- 关键词:
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催化裂化; 催化剂; 铁中毒; 粒径分布; 产品收率
- Keywords:
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fluid catalytic cracking; catalyst; iron-poisoning; particle size distribution; product yield
- 分类号:
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TE 624.9+1
- DOI:
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10.19909/j.cnki.ISSN1009-0045.2024.06.0436
- 文献标识码:
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B
- 摘要:
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针对某石化公司2.2 Mt/a催化裂化(FCC)装置催化剂(型号为CGP-LY)铁中毒现象,采用扫描电子显微镜、能谱仪、激光粒度仪等表征手段,结合催化剂微反活性、装置产品分布等评价方法,分析了催化剂铁中毒对该FCC装置的影响和危害。结果表明:当催化剂遭受铁污染中毒时,其表面形成瘤状凸起,表面孔道被瘤状物堵塞,催化剂球形度变差;当催化剂含铁质量分数为0.65%时,其表面凹槽处、瘤状凸起处含铁质量分数分别高达6.07%,2.55%;随着催化剂含铁质量分数由正常运行工况下的0.34%增至铁中毒工况下的0.65%,催化剂的堆密度由0.90 g/cm3降至0.82 g/cm3,表观密度由0.87 g/mL降至0.77 g/mL,孔体积由0.17 cm3/g降至0.14 cm3/g,比表面积由128 m2/g降至102 m2/g,微反活性(800 ℃×17 h)由76%降至62%,而催化剂中位粒径(D50)从66.61 μm增至90.93 μm;当催化剂含铁质量分数从0.34%增至≥0.60%(即铁中毒发生)时,原料油转化率由77%降至73%,液化气、汽油收率均降低约2个百分点,而干气中的氢/甲烷质量比由0.8增至1.0,柴油、油浆收率均提高约2个百分点。
- Abstract:
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Aiming at the iron-poisoning phenomenon of CGP-LY type catalyst in 2.2 Mt/a fluid catalytic cracking(FCC) unit at a petrochemical company,the influences and hazards of iron-poisoning on this FCC unit were analyzed by the scanning electron microscopy,energy spectrometer,laser particle size analyzer and other evaluation methods,and combining with evaluation methods such as catalyst micro-reactivity and unit products distribution. The results showed that when the catalyst suffered from iron-poisoning, the nodular bulges formed on the surface of the iron-poisoning catalyst,the surface pores were blocked by nodules,and the sphericity of catalyst got worse. When Fe mass fraction of the catalyst was 0.65%,the Fe mass fraction of the grooves and nodules on the surface reached 6.07%, 2.55%,respectively. As Fe mass fraction in the catalyst increased from 0.34% of normal operating condition to 0.65% of iron-poisoning condition,the corresponding bulk density of catalysts decreased from 0.90 g/cm3 to 0.82 g/cm3,the apparent density decreased from 0.87 g/mL to 0.77 g/mL,and the pore volume decreased from 0.17 cm3/g to 0.14 cm3/g,the specific surface area decreased from 128 m2/g to 102 m2/g,and the micro-reactivity (800 ℃×17 h) decreased from 76% to 62%,however,the median diameter(D50)of particle size distribution increased from 66.61 μm to 90.93 μm. When Fe mass fraction of catalyst increased from 0.34% to ≥0.60%(i.e. iron-poisoning occurred),then the feedstock oil conversion decreased from 77% to 73%,the yield of liquefied gas and gasoline both decreased by about 2 percentage points,and yet the mass ratio of hydrogen to methane of dry gas increased from 0.8 to 1.0, the yield of diesel and oil slurry both increased by about 2 percentage points.
参考文献/References
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更新日期/Last Update:
2024-11-10