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[交流]
求助翻译段落（英译汉，化学相关）
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| Coal conversion is dependent upon the reactor temperatures of each stage. The temperature coefficients of each stage are virtually the same; therefore, each is of equal importance. The interaction of the two stage temperatures is negative, which dampens the temperature effect of a single stage. According to the model, an increase in Temp1 and Temp2 from the lowest of the ranges (762 °F/679 °F) to the highest (834 °F/824 °F) would cause only a 4 wt % MAF increase in coal conversion. However, these specific combinations of reactor temperature have not been demonstrated at the pilot plant. In Figure 7, the first-stage temperature seems to be more significant. This is due to the interaction term with Temp2 and the fact that the average second stage temperature is higher that the first. The effect of 1/SpRate (nominal residence time) on coal conversion is small but significant. Much of the dissolution of Illinois No. 6 seam coal occurs in the initial time period. Thereafter, the conversion increase with longer residence time is only incremental, as observed in Figure 7. An increase in the process solvent resid (PSR) level causes only a minor increase in coal conversion, as shown in Figure 7. Over the entire range of PSR values (24-50 wt % MAF), the change in coal conversion is only _2 wt %. The hydrogen-donating properties of the residuum may help to prevent some retrogressive reactions and, thus, increase conversion of coal to cresolsolubles. Because of operability and pump ability problems, the PSR could not be increased beyond 50 wt %. |
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3楼2009-06-07 12:12:08
为什么没人回复呢？ 2楼2009-06-07 11:05:47
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xiao828(金币+1):谢谢参与
xiao828(金币+17,VIP+0): 6-7 21:49
xiao828(金币+1):谢谢参与
xiao828(金币+17,VIP+0): 6-7 21:49
| 煤转换依赖于反应堆各阶段的温度，因为各阶段的温度系数实际上是相同的，所以每个阶段都具有同等重要的地位。两阶段温度的相互干预是负相关的，会减弱单一阶段的温度效应。根据这一理论模型，将温度1（temp1）和温度2（temp2）分别从最低762华氏度、679华氏度升高至最高温度834 华氏度、824 华氏度仅仅能使煤转换后产物增加4%的重量，然而这些理论上特定的反应堆温度组合还未曾被小规模试验所证实。在图7中，第一阶段的温度看上去似乎更重要，这是因为它与temp2的交感项使得第二阶段平均温度高于第一阶段的温度。额定停留时间1/SpRate 对煤转换的影响虽然小但是很重要，从图7中可看到llinois 6号煤层的大部分分解发生在起始阶段，此后随着停留时间的增加煤转换递增，而增加处理溶剂残油水平时煤转换只有微量的增加。 |
4楼2009-06-07 12:30:37
5楼2009-06-07 12:44:44
