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1、www.XiYuS锡育软件 Four hundred parts per million: thats the approximate concentration of CO2 in the air today. 百万分之四百, 那是现今空气中, 二氧化碳的大约 浓度。00:12 What does this even mean?那到底是什么意思？00:20 For every 400 molecules of carbon dioxide, we have another million molecules of oxygen and nitrogen. 每 400 个二氧化碳的分子, 就会
2、有另外 100 万个 氧和氮的分子。00:21 In this room today, there are about 1,800 of us.现在在这间房间中, 我们大约有 1800 人,00:29 Imagine just one of us was wearing a green shirt, and youre asked to find that single person. 想像一下,我们当中 只有一人穿绿色上衣, 你被要 求去找到那一个人。00:33 Thats the challenge were facing when capturing CO2 directly out o
3、f the air. 那就是现今我们想要直接 捕获空气中的二氧化碳 时, 所遇到的问题。00:41 Sounds pretty easy, pulling CO2 out of the air.听起来挺简单的, 把二氧化碳从空气中去除。 00:47 Its actually really difficult.其实真的很困难。00:51 But Ill tell you what is easy: avoiding CO2 emissions to begin with. 但告诉各位什么很容易: 一开始就避免排放二氧化 碳。00:52 But were not doing that.但我们没有这
4、么做。00:58 So now what we have to think about is going back; pulling CO2 back out of the air. 所以现在我们必须回过头去; 把二氧化碳从空气中 抽出来。01:01 Even though its difficult, its actually possible to do this.即使很困难,还是有可能做到的。01:08 approximate: vt.近似;使接近;粗略估计/vi.接近于;近似于/adj.数近似的;大概的 molecules: n.化学分子,微粒;化学摩尔 (molecule的复数) d
5、ioxide: n.二氧化物 to begin with: 首先;本来 And Im going to share with you today where this technology is at and where it just may be heading in the near future. 今天我要和各位分享的是 这项技术的现况, 以及在 不远的将来, 它可能的发展方向。01:12 Now, the earth naturally removes CO2 from the air by seawater, soils, plants and even rocks. 地球本身自己
6、就会 把二氧化碳从空气中除去, 透过 海水、土壤、植物, 和甚至石头来做这件事。 01:19 And although engineers and scientists are doing the invaluable work to accelerate these natural processes, it simply wont be enough. 虽然工程师和科学家都投入在 加速这些自然过程 的无价工作上, 就是还不足够。01:29 The good news is, we have more.好消息是,我们还有其他方法。01:39 Thanks to human ingenuity
7、, we have the technology today to remove CO2 out of the air using a chemically manufactured approach. 靠着人类的足智多谋, 我们现在有技术 可以把空气 中的二氧化碳除去, 利用化学反应的方法。01:41 I like to think of this as a synthetic forest.我喜欢把它想成是一个合成森林。01:51 There are two basic approaches to growing or building such a forest. 要种出或建造出这样的森
8、林, 有两种基本的方 式:01:54 One is using CO2-grabbing chemicals dissolved in water.第一是使用溶解在水中且能够 抓取二氧化碳的化 学物质。02:00 removes: n.清除;印刷引语排版;迁移;差距(remove的复数)/v.除掉(remove的三单形式);搬开;迁移;脱掉 seawater: n.海水 invaluable: adj.无价的；非常贵重的 ingenuity: n.心灵手巧,独创性;精巧;精巧的装置 chemically: adv.用化学;以化学方法 manufactured: adj.制造的,已制成的/v.制
9、造,加工(manufacture的过去式) synthetic: adj.综合的;合成的,人造的/n.合成物 approaches: 处理 dissolved: adj.溶解的;溶化的/v.使溶解;使溶化(dissolve的过去分词) Another is using solid materials with CO2-grabbing chemicals. 第二是使用固态材料, 内含有能抓取二氧化碳的化 学物质。02:05 No matter which approach you choose, they basically look the same. 不论你选择哪一种方法, 基本上它们看起
10、来是一样 的。02:09 So what Im showing you here is what a system might look like to do just this. 我接着要给各位看,做这件事的系统 是什么样子 的。02:13 This is called an air contactor.这叫做空气接触器。02:18 You can see it has to be really, really wide in order to have a它必须要非常非常宽, 这样才能有足够大的表面积 来处理所有必要的空气, 因为,别忘了, 我们试着在 TED演讲者：Jennifer Wi
11、lcox | 珍妮佛 威尔考克斯 演讲标题：A new way to remove CO2 from the atmosphere | 从大气中除去二氧化碳的新方法 内容概要：Our planet has a carbon problem - if we dont start removing carbon dioxide from the atmosphere, well grow hotter, faster. Chemical engineer Jennifer Wilcox previews some amazing technology to scrub carbon from th
12、e air, using chemical reactions that capture and reuse CO2 in much the same way trees do . but at a vast scale. This detailed talk reviews both the promise and the pitfalls. 地球遇到了碳的问题，如果我们再不开始除去大气中的二氧化碳，气候变热的速度就会加快。化学工程师珍 妮佛 威尔考克斯带我们看这些了不起的科技，用化学反应的方式清除空气中的二氧化碳；其过程和树木很类 似，但规模更大。这场巨细靡遗的演说，探讨除碳的承诺和所面对
13、的困难。 You can see it has to be really, really wide in order to have a high enough surface area to process all of the air required, because remember, were trying to capture just 400 molecules out of a million. 来处理所有必要的空气, 因为,别忘了, 我们试着在 一百万个分子中 捕集四百个分子。02:21 Using the liquid-based approach to do this,
14、you take this high surface area packing material, you fill the contactor with the packing material, you use pumps to distribute liquid across the packing material, and you can use fans, as you can see in the front, to bubble the air through the liquid. 如果要用液体方法来捕集, 你就要用这大表面积的 包材, 把接触器用包材装满, 用幫浦将液体分布
15、至 包材的各处, 还可以用风扇,如图的前方所示, 让空 气通过液体产生泡泡。02:34 The CO2 in the air is separated from the liquid by reacting with the really strong-binding CO2 molecules in solution. 空气中的二氧化碳和液体分离, 因为它会和溶液中 结合力极强的 二氧化碳分子发生作用。02:52 And in order to capture a lot of CO2, you have to make this contactor deeper. 为了要捕集很多二氧化碳,
16、 这个接触器必须要做得 很深。03:03 contactor: n.开关;电流接触器 pumps: n.机泵;脉动(pump的复数);抽运器;无带轻便舞鞋/v.用泵送;抽动;汲取;盘问(pump的 三单形式) as you can see: 正如你所看到的;你是知道的 bubble: n.气泡,泡沫,泡状物;透明圆形罩,圆形顶/vi.沸腾,冒泡;发出气 泡声/vt.使冒泡;滔滔不绝地说 But theres an optimization, because the deeper you make that contactor, the more energy youre spending on bubbling all that air through. 但有个最佳化的点, 因为接触器越深, 你就要花更 多能源来把空气打过去。03:09 So air contactors for direct air capture have this unique characteristic design, where they have this huge surface area, b
