 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 649 | 回復(fù): 4 | ||
[求助]
翻譯到最后一段了，求助
|
|
XGa2O3-CeO2-ZrO2 (X=0, 1, 3, 5, 7, and 9) catalysts were prepared by a single-step sol-gel method with a variation of Ga2O3 content (X, wt%). Based on our previous work, the ratio of cerium oxide : zirconium oxide in the XGa2O3-CeO2-ZrO2 catalyst was fixed to be Ce0.6Zr0.4O2. The prepared catalysts were applied to the direct synthesis of DMC from methanol and carbon dioxide. XGa2O3-CeO2- ZrO2 (X=1, 3, 5, 7, and 9) showed a better catalytic performance than 0Ga2O3-CeO2-ZrO2 (Ce0.6Zr0.4O2) in the reaction due to the enhanced acidity and basicity provided by Ga2O3. Among the catalysts tested, 3Ga2O3-CeO2-ZrO2 catalyst showed the best catalytic performance in the direct synthesis of DMC from methanol and carbon dioxide. Furthermore, the amount of DMC produced over 3Ga2O3-CeO2-ZrO2 catalyst prepared by a single-step sol-gel method was larger than that over 5Ga2O3/Ce0.6Zr0.4O2 catalyst (the best catalyst in our previous work) prepared by an incipient wetness impregnation method. This indicates that a single-step sol-gel method was more efficient than an incipient wetness impregnation method in the preparation of Ga2O3-CeO2-ZrO2 mixed metal oxide catalyst for the reaction. NH3-TPD and CO2-TPD experiments were conducted to investigate the effect of acidity and basicity of the catalyst on the catalytic performance in the direct synthesis of DMC from methanol and carbon dioxide. Experimental results revealed that the catalytic performance of XGa2O3-CeO2-ZrO2 was closely related to both acidity and basicity of the catalyst in this reaction. The amount of DMC increased with increasing both acidity and basicity of the catalyst. It is concluded that both acidity and basicity of the catalyst played important roles in determining the catalytic performance in the direct synthesis of DMC from methanol and carbon dioxide. |
回復(fù)此樓» 猜你喜歡
材料科學(xué)與工程求調(diào)劑
已經(jīng)有5人回復(fù)
-
一志愿北京化工大學(xué)材料與化工（085600）296求調(diào)劑
已經(jīng)有17人回復(fù)
-
考研調(diào)劑
已經(jīng)有7人回復(fù)
-
343求調(diào)劑085601
已經(jīng)有3人回復(fù)
-
08工科求調(diào)劑286
已經(jīng)有3人回復(fù)
-
337求調(diào)劑
已經(jīng)有3人回復(fù)
-
329求調(diào)劑，一志愿西北工業(yè)大學(xué)，材料工程（085601）
已經(jīng)有10人回復(fù)
-
291求調(diào)劑
已經(jīng)有6人回復(fù)
-
299求調(diào)劑
已經(jīng)有10人回復(fù)
-
面上5B能上會嗎？
已經(jīng)有4人回復(fù)
sunliuqian
銀蟲 (小有名氣)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 14.3
- 散金: 175
- 紅花: 1
- 帖子: 165
- 在線: 100小時
- 蟲號: 1123738
- 注冊: 2010-10-16
- 性別: MM
- 專業(yè): 金屬功能材料
2樓2013-03-18 15:50:40
3樓2013-03-18 15:51:53
4樓2013-03-18 15:52:21
vigor_smile
金蟲 (職業(yè)作家)
- 翻譯EPI: 6
- 應(yīng)助: 73 (初中生)
- 金幣: 780
- 散金: 3612
- 紅花: 43
- 沙發(fā): 6
- 帖子: 4768
- 在線: 224小時
- 蟲號: 1889322
- 注冊: 2012-07-12
- 性別: GG
- 專業(yè): 畜牧學(xué)與草地科學(xué)
5樓2013-03-19 12:55:47
相關(guān)版塊跳轉(zhuǎn)
我要訂閱樓主 qiao_1989 的主題更新
| 5 | 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] 296求調(diào)劑 +5 | 彼岸t 2026-03-29 | 5/250 |
|
|---|---|---|---|---|
|
|
[考研] 085601材料工程找調(diào)劑 +13 | oatmealR 2026-03-29 | 14/700 |
|
|
[考研] 070305高分子化學(xué)與物理 304分求調(diào)劑 +12 | c297914 2026-03-28 | 12/600 |
|
|
|
[考研] 375求調(diào)劑 +4 | 雨夏整夜 2026-03-29 | 4/200 |
|
|
|
[考研] 343求調(diào)劑 +6 | 愛羈絆 2026-03-29 | 6/300 |
|
|
|
[考研]
 一志愿武漢理工，總分321，英一數(shù)二，求老師收留。
+10
|
nnnnnnn5 2026-03-25 | 10/500 |
|
|
|
[考研] 各位老師好，我的一志愿為北京科技大學(xué)085601材料專碩 +8 | Koxui 2026-03-28 | 8/400 |
|
|
|
[考研] 0703化學(xué) +11 | 妮妮ninicgb 2026-03-27 | 11/550 |
|
|
|
[考研] 083000學(xué)碩274求調(diào)劑 +8 | Li李魚 2026-03-26 | 8/400 |
|
|
|
[考研] 295材料工程專碩求調(diào)劑 +7 | 1428151015 2026-03-27 | 7/350 |
|
|
|
[考研] 一志愿北化085600材料專碩275|有文章專利｜求調(diào)劑 +7 | Micky11223 2026-03-25 | 7/350 |
|
|
|
[考研] 本科新能源科學(xué)與工程，一志愿華理能動285求調(diào)劑 +3 | AZMK 2026-03-27 | 5/250 |
|
|
|
[考研] 320分，材料與化工專業(yè)，求調(diào)劑 +9 | 一定上岸aaa 2026-03-27 | 13/650 |
|
|
|
[考研] 291求調(diào)劑 +15 | hhhhxn.. 2026-03-23 | 21/1050 |
|
|
|
[考研] 0703化學(xué)求調(diào)劑，各位老師看看我�。。� +5 | 祁祺祺 2026-03-25 | 5/250 |
|
|
|
[考研] 308求調(diào)劑 +7 | 墨墨漠 2026-03-25 | 7/350 |
|
|
|
[考研] 求調(diào)劑 +3 | 劉柯@ 2026-03-24 | 4/200 |
|
|
|
[考研] 調(diào)劑 +3 | 李嘉圖·S·路 2026-03-27 | 3/150 |
|
|
|
[考研] 求調(diào)劑 +3 | 李李不服輸 2026-03-25 | 3/150 |
|
|
|
[考研] 269求調(diào)劑 +4 | 我想讀研11 2026-03-23 | 4/200 |
|