Co-hydrogenation behavior of Hami coal with Tahe residue
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摘要: 采用高压釜考察了哈密煤与塔河重油单独加氢反应性能和共加氢反应性能,探索了哈密煤与塔河渣油共加氢的可行性技术路线。实验结果表明,哈密煤具有良好的液化反应性能,合适的反应温度为445 ℃,在445 ℃、9 MPa时转化率达98.74%,油收率达68.54%;塔河渣油单独加氢在较低反应温度时表现出明显的结焦倾向,很难实现加氢轻质化,430 ℃时,转化率仅有66.38%,轻质油收率也仅有50.01%,结焦率却高达9.45%,随着反应温度升高,结焦速率加剧;哈密煤与塔河渣油共加氢时转化率较低,结焦明显,煤/油比为40∶60时转化率为97.79%,油收率为73.36%。在共加氢体系中引入具有供氢性能溶剂能够有效抑制生焦,提高转化率,实现共加氢轻质化,在煤粉添加量为45%时,塔河渣油合适的添加量为20%,原料的转化率达到98.38%,油收率为74.82%。Abstract: The hydrogenation and co-hydrogenation behaviors of Hami coal and Tahe residue were investigated in an autoclave, and the feasible technical route for co-hydrogenation was explored. The experimental results showed that Hami coal had good hydroliquefaction performance and the suitable reaction temperature was 445℃. At 445℃ and 9 MPa, the coal conversion rate reached 98.74%, and the oil yield reached 68.54%. The hydrogenation tests of Tahe residue showed obvious coking tendency at the lower temperature, and it was difficult to achieve lightening. At 430℃, the conversion rate of Tahe residue was only 66.38%, the light oil yield was only 50.01%, and its coking rate was as high as 9.45%. The coking rate increased with the reaction temperature. When the mixtures of Hami coal and Tahe residue were co-hydrogenated directly, the conversion rate of the raw materials was lower, and the coke phenomenon was obvious. At the coal/oil ratio was 40:60, the conversion rate was 97.79%, and oil yield was 73.36%. Adding hydrogen solvents into the co-hydrogenation system could effectively inhibit coke formation, increase the conversion rate, and lighten co-hydrogenation products. When the amount of coal was 45% and Tahe residue was 20%, the conversion rate of raw materials was 98.38% and the oil yield was 74.82%.
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Key words:
- oil-coal co-hydrogenation /
- coal hydroliquefaction /
- residual oil /
- hydrogen solvent
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表 1 哈密煤的性质分析
Table 1 Analysis of Hami coal
Proximate analysis w/% Ultimate analysis wdaf/% n(H)/n(C) Petrographic analysis φ/% Mad Ad Vdaf FCdaf C H O N S vitrinite inertinite exinite 2.34 6.86 46.77 53.23 75.44 5.57 17.91 0.87 0.21 0.89 60.00 25.60 8.00 表 2 BSU循环溶剂族组成分析
Table 2 Group composition of BSU recycle solvent
Saturate w/% Aromatics w/% Resin w/% paraffin naphthenic monocyclic aromatic bicyclic aromatic tricyclic aromatic tetracyclic aromatic pentacyclic aromatic thiophene other 10.00 12.20 33.60 21.40 8.70 4.10 0.30 4.50 1.00 4.20 表 3 塔河渣油的性质分析
Table 3 Analysis of Tahe residue
Ultimate analysis w/% n(H)/n(C) SARA composition w/% C H O N S saturate aromatics resin asphaltene 85.81 10.29 0.73 0.50 2.67 1.44 27.70 34.00 20.20 18.10 表 4 塔河渣油平均分子结构参数
Table 4 Average molecular structural parameters in the Tahe residue
Items Calculated value fA 0.32 fN 0.18 fP 0.50 CA 16.67 CN 9.73 CP 26.37 RT 7.47 RA 4.22 RN 3.24 CI 0.25 HAU/CA 0.53 σ 0.58 L 7.11 Average molecular formula C52.77H75.94S0.62N0.26O0.34 -
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