Fundamental study on the fluid coking behavior of Dagang oil slurry and preparation of aromatic-rich oil

doi:10.11949/0438-1157.20201786

Abstract

Abstract:

Using Dagang oil slurry as the raw material and fluidized coking powder as the carrier, the investigation of its conversion reaction characteristics provides guidance for the development of high-value utilization technology of oil slurry. First, a thermogravimetric analyzer was used to study the thermal decomposition characteristics of Dagang slurry oil and fluid coke. Afterwards, quartz sand and fluid coke were used as heat carriers to explore the thermal conversion reaction law of Dagang slurry oil at different temperatures. When the temperature was about 500℃, the quartz sand cracked oil yield was 85.54%, and the gas yield was 1.24%. Correspondingly, the oil and gas yield over fluid coke was 84.02% and 1.77%, respectively, indicating that the fluid coke had the effect of promoting thermal conversion. Combining FTIR and GC-MS to analyze the slurry oil and its pyrolysis oil, the results show that fluidized thermal conversion had achieved the enrichment of the aromatics components of the oil slurry, and the pyrolysis oil obtained from fluid coke as the heat carrier was richer in aromatics than that of silica sand. Finally, the circulation characteristics of fluid coke were investigated and verified the feasibility of fluid coke as a heat carrier due to its catalytic stability.

Key words: oil slurry, fluid coke, heat carrier, fluid thermal conversion

摘要：

以大港油浆为原料，流化焦化焦粉为载体，考察其转化反应特性，为油浆高价值利用技术的开发提供指导。首先采用热重分析仪对大港油浆和焦粉的热分解特性进行研究，之后分别以石英砂和焦粉作为热载体，探究大港油浆流化热转化反应规律。温度为500℃时，石英砂裂解液体和气体收率分别为85.54%和1.24%，相应的焦粉裂解液体和气体收率分别为84.02%和1.77%，说明与石英砂相比，焦粉具有促进热转化的作用。综合红外及GC-MS对油浆及其液体产物的分析结果，流化热转化实现了油浆中芳烃组分的富集，且焦粉裂解液体中芳烃富集效果更好。最后焦粉循环利用实验结果表明，焦粉裂化效果的稳定性较好，验证了焦粉作为油浆改性接触剂的可行性。

关键词: 油浆, 流化焦化焦粉, 热载体, 流化热转化

CLC Number:

TQ 546

Yuming ZHANG, Lifeng WAN, Juntao GUAN, Haipeng SONG, Hang YANG, Shiqiu GAO. Fundamental study on the fluid coking behavior of Dagang oil slurry and preparation of aromatic-rich oil[J]. CIESC Journal, 2021, 72(8): 4325-4335.

张玉明, 万利锋, 管俊涛, 宋海朋, 杨行, 高士秋. 大港油浆流化焦化行为及其富芳烃油制备基础研究[J]. 化工学报, 2021, 72(8): 4325-4335.

Figures/Tables 17

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项目	大港油浆	项目	大港油浆
密度（20℃）/(g/cm³)	1.032	康氏残炭/%(质量)	18.61
运动黏度（80℃）/(mm²/s)	131.31	固含量/(μg/g)	3100
元素组成分析 /%(质量)		n(H)/n(C)	1.17
C	88.6	馏程分布/℃
H	8.62	初馏点	371
S	1.34	10%	416
N	0.25	30%	447
四组分分析/%(质量)		50%	473
饱和分	23.46	70%	500
芳香分	59.85	90%	538
胶质	14.20	终馏点	600
沥青质（正戊烷）	2.49

项目	大港油浆	项目	大港油浆
密度（20℃）/(g/cm³)	1.032	康氏残炭/%(质量)	18.61
运动黏度（80℃）/(mm²/s)	131.31	固含量/(μg/g)	3100
元素组成分析 /%(质量)		n(H)/n(C)	1.17
C	88.6	馏程分布/℃
H	8.62	初馏点	371
S	1.34	10%	416
N	0.25	30%	447
四组分分析/%(质量)		50%	473
饱和分	23.46	70%	500
芳香分	59.85	90%	538
胶质	14.20	终馏点	600
沥青质（正戊烷）	2.49

工业分析/%(质量)				元素分析/%(质量)					HHV/(MJ/kg)
M_ad	A_ad	V_ad	FC_ad	C_daf	H_daf	S_daf	N_daf	O_daf^①	HHV/(MJ/kg)
0.54	5.17	7.63	86.66	85.38	2.31	3.53	1.94	6.84	32.15

工业分析/%(质量)				元素分析/%(质量)					HHV/(MJ/kg)
M_ad	A_ad	V_ad	FC_ad	C_daf	H_daf	S_daf	N_daf	O_daf^①	HHV/(MJ/kg)
0.54	5.17	7.63	86.66	85.38	2.31	3.53	1.94	6.84	32.15

项目	500℃	550℃	600℃
收率
油收率/%(质量)	85.54	83.33	81.66
焦炭收率/%(质量)	12.52	13.03	14.51
气体收率/%(质量)	1.24	1.84	3.01
总产物收率/%(质量)	99.31	98.21	99.18
液体产物分布
汽油馏分/%(质量)	0.12	0.61	1.01
柴油馏分/%(质量)	4.41	5.24	7.22
VGO馏分/%(质量)	65.49	66.39	66.47
重油馏分/%(质量)	29.98	27.76	25.31
液体产物固含量
裂解油品固含量/(μg/g)	214	199	191
脱固率/%	93.10	93.58	93.84