PERFORMANCE OF NICKEL RESISTANCE OF IN SITU CRYSTALLIZATION CATALYST MODIFIED BY MAGNESIUM

Abstract

Abstract: The effects of magnesium on nickel resistance of the in-situ crystallization catalysts were investigated. The magnesium-modified samples were prepared by impregnation of Mg and characterized by N2 adsorption-desorption isotherm method, IR, XRD and MAT techniques. The nickel resistance tests were conducted in a fixed fluidized reactor. The results showed that under the condition of nickel pollution, when the magnesium loading on the catalyst is 1.0%, the micro-reaction activity of the catalyst is reduced by 19 percentage points compared with the catalyst sample without magnesium,the dry gas yield and coke yield decreased by 0.81 and 4.36 percentage points, respectively, and the heavy oil conversion rate and C5+ gasoline yield changed slightly,which indicated that the proper amount of magnesium supported on the in-situ crystallization catalyst can improve the nickel resistance of the catalyst to some extent.

Key words: magnesium, in situ crystallization catalyst, nickel resistance

CLC Number:

References

[1]孙书红, 雷孝荣, 庞新梅, 等.抗重金属重油催化裂化催化剂的研制[J].石化技术与应用, 2001, 19(1):28-31
[2]程远坤, 钱东, 郑淑琴, 等.以高岭土和硅藻土为原料原位晶化合成分子筛[J].硅酸盐学报, 2012, 40(8):1204-1209
[3]周宝龙, 姜洪文, 聂英斌.原位晶化材料的发展现状及应用前景[J].化学与粘合, 2013, 35(1):75-77
[4]Willis M J, Folmar K W.Heavy metals trapping co-catalyst for FCC processes: US, US 8372269 B2[P]. 2013.
[5]Wallenstein D, Farmer D, Knoell J, et al. Progress in the deactivation of metals contaminated FCC catalysts by a novel catalyst metallation method[J]. Applied Catalysis A General, 2013, 462(27):91-99.
[6]范啸, 樊继利, 张洁, 等.一种炼厂催化装置用多金属钝化剂及其制备方法: 中国, CN107159315A [P]. 2017-09-15.
[7]庞新梅, 孙书红, 丁伟.具有抗镍性能的催化剂基质[J].工业催化, 2002, 10(2):50-53
[8]庞新梅, 常晓平, 丁伟, 等.改善催化剂抗镍性的机理研究[J].石化技术与应用, 2003, 21(2):107-109
[9]Brown.Fluid catalytic cracking catalyst comprising microspheres containing more than about 40 percent by weight Y – faujasite and methods for making [P]. US4493902.1985.
[10]叶天旭, 潘惠芳.硼酸铵型催化裂化钝镍剂的工业应用及其钝化机理[J].应用化学, 2002, 19(1):34-37
[11]叶天旭, 高永灿, 陈恒芳, 等.硼的钝镍作用及机理研究[J].石化技术, 2000, 7(1):18-20
[12]Myrstad T, Engan H, Seljestokken B, et al. Sulphur reduction of fluid catalytic cracking (FCC) naphtha by an in situ Zn/Mg(Al)O FCC additive[J]. Applied Catalysis A General, 1999, 187(2):207-212.
[13]孙雪芹, 王林, 张爱萍, 等.含量对分子筛酸性和焦炭选择性的影响研究[J].应用化工, 2012, 41(10):75-78
[14]Ferenc Lonyi, Jozsef Valyon.A TPD and IR study of the surface species formed from ammonia on zeolite H-ZSM-5,H-mordenite and H-beta[J].Thermochimica Acta, 2001, 373(1):53-57
[15]刘晓飒, 陈淑俊, 赵铁英, 等.吡啶-热脱附-红外法确定催化剂酸性[J].工业催化, 2015, 23(10):817-820
[16]苏琼, 陈辉, 陆善祥.催化裂化催化剂的酸性调变方法[J].现代化工, 2011, 31(1):43-46