 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 3 | 1/1 | 返回列表 |
| 查看: 652 | 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(chóng) (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
303求調(diào)劑
已經(jīng)有8人回復(fù)
-
考研調(diào)劑
已經(jīng)有10人回復(fù)
-
0856材料化工調(diào)劑 總分330
已經(jīng)有8人回復(fù)
-
316求調(diào)劑
已經(jīng)有3人回復(fù)
-
317求調(diào)劑
已經(jīng)有3人回復(fù)
-
材料與化工（0856）304求B區(qū)調(diào)劑
已經(jīng)有4人回復(fù)
-
322求調(diào)劑
已經(jīng)有3人回復(fù)
-
085601 材料工程 313分 求調(diào)劑
已經(jīng)有4人回復(fù)
-
321求調(diào)劑
已經(jīng)有4人回復(fù)
-
329求調(diào)劑
已經(jīng)有3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(lái)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] 292求調(diào)劑 +12 | 鵝鵝鵝額額額額?/a> 2026-03-25 | 13/650 |
|
|---|---|---|---|---|
|
[考研] 0703化學(xué)338求調(diào)劑！ +6 | Zuhui0306 2026-03-26 | 7/350 |
|
|
|
[考研] 304求調(diào)劑 +3 | 曼殊2266 2026-03-27 | 3/150 |
|
|
|
[考研] 0856材料專碩353求調(diào)劑 +9 | NIFFFfff 2026-03-20 | 9/450 |
|
|
|
[考研] 327求調(diào)劑 +7 | prayer13 2026-03-23 | 7/350 |
|
|
|
[考研]
 一志愿廈門(mén)大學(xué)化學(xué)學(xué)碩307求調(diào)劑
+8
|
y7czhao 2026-03-26 | 8/400 |
|
|
|
[考研] 化學(xué)工程085602 305分求調(diào)劑 +17 | RichLi_ 2026-03-25 | 17/850 |
|
|
|
[考研] 材料科學(xué)與工程 317求調(diào)劑 +4 | JKSOIID 2026-03-26 | 4/200 |
|
|
|
[考研] 調(diào)劑310 +3 | 溫柔的晚安 2026-03-25 | 4/200 |
|
|
|
[考研] 334分 一志愿武理-080500 材料求調(diào)劑 +4 | 李李不服輸 2026-03-25 | 4/200 |
|
|
|
[考研] 機(jī)械學(xué)碩總分317求調(diào)劑�。。�！ +4 | Acaciad 2026-03-25 | 4/200 |
|
|
|
[考研] 一志愿北京化工大學(xué) 070300 學(xué)碩 336分 求調(diào)劑 +7 | vv迷 2026-03-22 | 7/350 |
|
|
|
[考研] 生物學(xué)一志愿985，分?jǐn)?shù)349求調(diào)劑 +6 | zxts12 2026-03-21 | 9/450 |
|
|
|
[考研] 工科0856求調(diào)劑 +5 | 沐析汀汀 2026-03-21 | 5/250 |
|
|
|
[考研] 石河子大學(xué)（211、雙一流）碩博研究生長(zhǎng)期招生公告 +3 | 李子目 2026-03-22 | 3/150 |
|
|
|
[考研] 求調(diào)劑 +5 | Zhangbod 2026-03-21 | 7/350 |
|
|
|
[考研] 一志愿南大，0703化學(xué)，分?jǐn)?shù)336，求調(diào)劑 +3 | 收到VS 2026-03-21 | 3/150 |
|
|
|
[考研] 一志愿深大，0703化學(xué)，總分302，求調(diào)劑 +4 | 七月-七七 2026-03-21 | 4/200 |
|
|
|
[考研] 材料與化工（0856）304求 B區(qū) 調(diào)劑 +3 | 邱gl 2026-03-21 | 3/150 |
|
|
|
[考研] 261求B區(qū)調(diào)劑，科研經(jīng)歷豐富 +3 | 牛奶很忙 2026-03-20 | 4/200 |
|