 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 3 | 1/1 | 返回列表 |
| 查看: 655 | 回復(fù): 2 | |||
| 本帖產(chǎn)生 1 個(gè) 翻譯EPI ，點(diǎn)擊這里進(jìn)行查看 | |||
yingxingwang銀蟲 (小有名氣)
|
[求助]
翻譯不會(huì)
|
||
|
3.3. Effect of specific surface area on the activity Generally, the specific surface area plays an important role in catalyst activity. Liu et al. and Schurz et al. reported that the activities of OMS-2 catalysts were correlated to their specific surface areas in the oxidation of cyclohexanol and benzyl alcohol.In our study, the specific surface area did not fit very well with the catalytic activity trend. For instance, the Fe-OMS-2 catalyst with the largest specific surface area (58 m /g) showed the lowest activity, while the Cu-OMS-2 catalyst with relatively smaller specific surface area (47 m /g) exhibited the best activity. Therefore,the specific reaction rates (Rs), namely, the amounts of DME consumed per unit of surface area and per second at 180 °C, were employed to eliminate the effect of specific surface area [32,33].According to our previous studies, the Rs could reflect the catalytic activity trend very well [21]. As shown in Table 1, the Rs values are in the following order: Cu-OMS-2 > Ni-OMS-2 > Co-OMS-2 > Fe-OMS-2 > Cr-OMS-2, which agrees well with the catalytic activity trend. For example, the Cu-OMS-2 catalyst with the highest Rs (1.50 lmol/(s m ).) has the best activity, and Cr-OMS-2 catalyst with the lowest Rs (0.072 lmol/(s m )) has the lowest activity. |
回復(fù)此樓» 猜你喜歡
復(fù)試調(diào)劑，一志愿南農(nóng)083200食品科學(xué)與工程
已經(jīng)有5人回復(fù)
-
一志愿南師大0703化學(xué) 275求調(diào)劑
已經(jīng)有3人回復(fù)
-
0703化學(xué)
已經(jīng)有3人回復(fù)
-
308求調(diào)劑
已經(jīng)有7人回復(fù)
-
289求調(diào)劑
已經(jīng)有4人回復(fù)
-
求調(diào)劑推薦 材料 304
已經(jīng)有12人回復(fù)
-
材料與化工085600，總分304，本科有兩篇sci參與，求調(diào)劑
已經(jīng)有11人回復(fù)
-
考研化學(xué)308分求調(diào)劑
已經(jīng)有12人回復(fù)
-
085600，材料與化工321分，求調(diào)劑
已經(jīng)有9人回復(fù)
-
265求調(diào)劑
已經(jīng)有4人回復(fù)
2樓2013-03-31 14:24:46
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
yingxingwang: 金幣+15, 翻譯EPI+1, ★★★很有幫助 2013-04-01 18:32:01
yingxingwang: 金幣+15, 翻譯EPI+1, ★★★很有幫助 2013-04-01 18:32:01
|
具體的單位格式你自己修改。 3.3 比表面積對(duì)活性的作用 通常，比表面積在催化活性中有重要作用。Liu等人和Schurz等人報(bào)道了在環(huán)己醇和芐醇的氧化作用中OMS-2催化劑與其比表面積相關(guān)。在我們的研究中，比表面積與催化活性趨勢(shì)并不很好地相符合。例如，有著最大比表面積(58 m /g)的Fe-OMS-2催化劑顯示最低活性，而具有相對(duì)更小的比表面積(47 m /g)的Cu-OMS-2催化劑展現(xiàn)出最好活性。因此，采用反應(yīng)比速（Rs），也就是180 °C每單位表面積每秒消耗的DME的量，來消除比表面積的作用[32,33]。根據(jù)我們以往的研究，值為下述順序：Cu-OMS-2 > Ni-OMS-2 > Co-OMS-2 > Fe-OMS-2 > Cr-OMS-2，其與催化活性趨勢(shì)相符。例如，具有最大Rs (1.50 lmol/(s m ).)的Cu-OMS-2催化劑有最高活性，且具有最小Rs (0.072 lmol/(s m ))的Cr-OMS-2催化劑有最低活性。 |
3樓2013-04-01 12:53:07
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 yingxingwang 的主題更新
| 3 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 0856材料化工調(diào)劑 總分330 +8 | zhubinhao 2026-03-27 | 8/400 |
|
|---|---|---|---|---|
|
[考研] 085600材料與化工306 +10 | z1z2z3879 2026-03-21 | 11/550 |
|
|
|
[考研] 334求調(diào)劑 +3 | 雨清天晴 2026-03-21 | 3/150 |
|
|
|
[考研] 311求調(diào)劑 +5 | 勇敢的小吳 2026-03-20 | 5/250 |
|
|
|
[論文投稿] Journal of Mechanical Science and Technology +3 | Russ_ss 2026-03-25 | 5/250 |
|
|
|
[考研] 304求調(diào)劑 +3 | 曼殊2266 2026-03-27 | 3/150 |
|
|
|
[考研]
 一志愿武漢理工，總分321，英一數(shù)二，求老師收留。
+5
|
nnnnnnn5 2026-03-25 | 5/250 |
|
|
|
[考研] 調(diào)劑 +4 | 柚柚yoyo 2026-03-26 | 4/200 |
|
|
|
[考研] 324求調(diào)劑 +4 | wysyjs25 2026-03-21 | 4/200 |
|
|
|
[考研] 340求調(diào)劑 +3 | Amber00 2026-03-26 | 3/150 |
|
|
|
[考研] 291 求調(diào)劑 +7 | 化工2026屆畢業(yè)?/a> 2026-03-21 | 8/400 |
|
|
|
[考研] 材料與化工304求B區(qū)調(diào)劑 +3 | 邱gl 2026-03-25 | 3/150 |
|
|
|
[考研] 289材料與化工（085600）B區(qū)求調(diào)劑 +4 | 這么名字咋樣 2026-03-22 | 5/250 |
|
|
|
[考研] 328求調(diào)劑 +4 | LHHL66 2026-03-23 | 4/200 |
|
|
|
[考研] 315分，誠求調(diào)劑，材料與化工085600 +3 | 13756423260 2026-03-22 | 3/150 |
|
|
|
[考研] 求調(diào)劑 +5 | Zhangbod 2026-03-21 | 7/350 |
|
|
|
[考研] 285求調(diào)劑 +6 | ytter 2026-03-22 | 6/300 |
|
|
|
[考研] 一志愿華中科技大學(xué)071000，求調(diào)劑 +4 | 沿岸有貝殼6 2026-03-21 | 4/200 |
|
|
|
[考研] 0703化學(xué)297求調(diào)劑 +3 | Daisy☆ 2026-03-20 | 3/150 |
|
|
|
[考研] 0805材料320求調(diào)劑 +3 | 深海物語 2026-03-20 | 3/150 |
|