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摘要: 在固定床反应器上开展模拟生物油温和加氢实验,确定300℃/4 MPa为最佳工况,此条件下反应物除苯酚和愈创木酚外完全转化,液体产物选择性为85.0%,有效氢碳比从1.266提高到1.554,液体产物组成优化,酚类和酸类含量明显下降,反应活性明显改善,有利于后续催化裂化反应。Abstract: A mild hydrogenation of simulated bio-oil was carried out in a fixed-bed reactor. Based on the experimental results, 300℃/4 MPa was chosen as an optimum condition for the mild hydrogenation, the simulated bio-oil was nearly completely converted. Besides, the liquid product selectivity achieved 85.0% and its (H/C)eff was significantly promoted from 1.266 to 1.554. The liquid composition was greatly improved and a notable decrease of phenols and acids contents was observed. In this case, the product activity was significantly enhanced and then the subsequent catalytic cracking was favored.
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Key words:
- bio-oil /
- model compounds /
- mild hydrogenation /
- effective hydrogen to carbon ratio
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表 1 反应后催化剂的积炭
Table 1 Coke deposition of spent catalysts
Conditions(℃/MPa) Coke/Catalyst(g/g) 200/2 0.073 250/2 0.063 300/2 0.055 200/3 0.075 250/3 0.061 300/3 0.057 200/4 0.071 250/4 0.059 300/4 0.055 表 2 不同工况下产物的选择性
Table 2 Product selectivities under different conditions
Conditions(℃/MPa) Product selectivity s/% liquid products CO CH4 C2H6 C3H8 C4H10 200/2 89.3 0 0 0 0 0.43 250/2 92.3 0 0.03 0.04 0.43 0.37 300/2 88.7 2.01 0.09 0.37 0.51 0.22 200/3 88.8 0 0 0 0 0.29 250/3 91.9 0 0.02 0.03 0.42 0.26 300/3 87.1 2.27 0.11 0.39 0.51 0.33 200/4 88.0 0 0 0 0 0.30 250/4 91.9 0 0 0.03 0.50 0.26 300/4 85.0 3.00 0.28 0.78 0.50 0.28 -
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