| 查看: 5730 | 回复: 144 | |||||||||
| 【奖励】 本帖被评价132次，作者dwma增加金币 103.6 个 | |||||||||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||||||||
[资源]
Angew. Chem. Int. Ed.---催化转化CO2
|
|||||||||
|
二氧化碳是重要的温室气体。许多工业过程以及汽车废气都要排放CO2.对CO2的催化反应处理，一种将其还原直接转变成燃料；另一种是将其功能化，以进一步用于合成其他化合物。这篇文章提出了一种结合二者的新方法。 相关新闻报道： Carbon dioxide is a nontoxic, abundant C1 building block,” says Cantat. “Only a handful of processes using this starting material have been developed, because carbon dioxide is a very stable molecule that can not easily be made to react.” To date, there have been two different approaches for the use of carbon dioxide. According to Cantat, “In the ‘vertical’ approach, the carbon dioxide is reduced, which means that the oxidation state of the carbon atom is reduced by the formal replacement of oxygen with hydrogen. This results in molecules such as methanol or formic acid, which can be converted into fuels.” These products have a higher energy content than carbon dioxide, but only a handful of chemicals can be produced this way. “In the ‘horizontal’ approach, the carbon atom is functionalized, which means that it forms new bonds to oxygen, nitrogen, or other carbon atoms”, continues Cantat. “The oxidation state stays the same, the energy content is not increased.” This does not produce fuels, but chemicals that are useful building blocks for chemical syntheses, such as urea. The French team thus tried a compromise approach, a combination of both methods to make a “diagonal” approach. By their method, the carbon dioxide is both reduced and functionalized in one step. This allows the synthesis of a much greater number of chemicals, directly from CO2. This reaction requires three things: a reducing agent (e.g. a silane), an organic molecule to be attached to the carbon atom of the carbon dioxide (e.g. an amine), and a special catalyst that catalyzes both the reduction and the functionalization. The successful catalyst is a special organic base consisting of a nitrogen-containing ring system. “Variation of the reaction partners should allow us to make a whole series of chemical compounds that are normally obtained from petrochemical feedstocks,” says Cantat, “for example, formamide derivatives, which are important intermediates for both chemical and pharmaceutical industries.”  Figure . Approaches to recycling transformations of CO2 as alternatives |
回复此楼» 收录本帖的淘帖专辑推荐
 半导体光催化与纳米TiO2 | 催化资料 | 好资料 | 催化剂 |
| 值得一看 | 重要文献 | 文献收入 |
» 猜你喜欢
湖南大学招收锂离子电池、离子液体、高分子与凝胶材料、电催化方向博士生多名
已经有5人回复
-
关于五水硝酸铋还原得到单质铋的问题
已经有1人回复
-
化学工程及工业化学论文润色/翻译怎么收费?
已经有189人回复
-
山东省青年基金什么时候拨款
已经有34人回复
-
T/FSI 177-2024 氟化工企业安全生产规范
已经有0人回复
-
CES投稿
已经有2人回复
-
如何掌握一门外语？
已经有0人回复
-
企业为什么一定要做“专精特新”认定？如何成为专精特新企业？
已经有5人回复
-
求助ASIQwin新版本的软件
已经有0人回复
-
求全国高速分析学术交流会论文集
已经有1人回复
» 本主题相关价值贴推荐，对您同样有帮助:
- 微米纳米版2011年7月--12月资源帖汇总
已经有9人回复
- Angew. Chem. Int. Ed.最新上转换纳米粒子综述
已经有25人回复
- 光催化的展望
已经有27人回复
- 重奖征集国内国外做理论计算课题组的信息
已经有44人回复
3楼2011-11-09 21:34:53
6楼2011-11-09 22:17:31
7楼2011-11-10 01:09:58
简单回复
2011-11-09 20:36
回复
五星好评 顶一下，感谢分享！
dwma4楼
2011-11-09 21:40
回复
顶一下，感谢分享！
具茨学人5楼
2011-11-09 21:43
回复
五星好评 顶一下，感谢分享！
2011-11-10 07:49
回复
五星好评 顶一下，感谢分享！
liujy1219楼
2011-11-10 08:00
回复
五星好评 顶一下，感谢分享！
gq86122010楼
2011-11-10 08:02
回复
五星好评 顶一下，感谢分享！
apaqiye11楼
2011-11-10 08:11
回复
五星好评 顶一下，感谢分享！
ljc05051212楼
2011-11-10 08:13
回复
五星好评 顶一下，感谢分享！
liuying102813楼
2011-11-10 08:55
回复
五星好评 顶一下，感谢分享！
qianqianliu14楼
2011-11-10 09:06
回复
五星好评 顶一下，感谢分享！