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| 论文编号: |
122214O120110251 |
| 第一作者所在部门: |
904组 |
| 中文论文题目: |
Modifying petroleum paving asphalt by coal liquefaction residues
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| 英文论文题目: |
Modifying petroleum paving asphalt by coal liquefaction residues
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| 论文题目英文: |
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| 作者: |
杨建丽
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| 论文出处: |
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| 刊物名称: |
The 28th Annual International Pittsburgh Coal Conferenc
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| 年: |
2011
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| 卷: |
0 |
| 期: |
0 |
| 页: |
61 |
| 联系作者: |
杨建丽 |
| 收录类别: |
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| 影响因子: |
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| 摘要: |
Direct coal liquefaction (DCL) is one of the processes for the production of clean fuels from coal. While it also produces 25-30% residues. Better use of the coal liquefaction residue (CLR) is important to the overall economy of DCL process. Four coal liquefaction residues from the different coal or the different units, named as CLR1, CLR2, CLR3 and CLR4, were used in this study. The modified bitumens were prepared by blending the residue (7 wt %) with the base bitumen (BZ90) under the same conditions. The standard tests for the base and the modified bitumen were carried out following JTJ 052-2000 standard (Chinese standard), which is compatible with corresponding ASTM standard. The CLR1 appears with the highest hexane-soluble fraction (HS) content and the lowest tetrahydrofuran-insoluble fraction (THFIS). The CLR4 appears with the lowest content HS and the highest THFIS content. The CLR2 appears with the lowest toluene-insoluble/tetrahydrofuran-soluble fraction (PA) content. The CLR3 and CLR4 appear with the highest PA content. The CLR2 appears with the lowest PA content. Addition 7% of the residues in BZ90 led to the similar change with respect to the softening point and the penetration value but significant difference in the ductility. Addition of CLR2 and CLR4 resulted in the less decrease in the ductility than the addition of the other two CLRs. There is notable difference in the morphology of four modified bitumens, but the TFOT process seems make no notable change in the morphology of the same CLR-modified bitumen. The order of the ductility of the modified bitumen is agreed with uniformity of the modified bitumen and the size of the residual in the modified bitumen but not the size of the original CLR. During the blending process the size of the CLR decreased in some extent depending on the nature of the CLR. The etrahydrofuran-insoluble fraction (THFS) of CLR2 or CLR4 with less amount of higher molecular weight fraction may more easily dissolve into the base bitumen than that of CLR1 or CLR3, resulting in positive effect on the ductility of the modified bitumen. Considering all these facts, the moderate content of HS, PA and THFIS fractions, the higher content of hexane-insoluble/toluene-soluble fraction (A) and lower molecule weight of THFS made CLR2 is the best bitumen additive. |
| 英文摘要: |
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