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求助翻译【有效期至2008年6月24日】
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我最近在忙毕业论文，但遇到了翻译问题，需要翻译一下的中文为英语，但由于我的英语不好，特请你帮忙翻译一下 醇类制氢、烃类制氢等制氢技术是当前燃料电池氢源技术开发研究的重点，近年的研究虽取得了可喜的进展，但产品气体中CO含量高，去除困难确直接影响了这些技术的广泛应用。 本文较为系统地研究了铜铈系催化剂的制备及在富氢气体气氛下CO的优先催化氧化过程。 考察了溶胶凝胶法、浸渍法、机械混合法及共沉淀法四种负载方法的适用性，并首次以复合沉淀剂制备铜铈催化剂；考察了Cu/Ce配比、负载量、焙烧温度等制备条件对催化活性的影响；通过活性评价筛选了催化剂；通过单因素实验、正交实验考察了反应温度、空速、氧碳比等工艺条件对CO优先氧化的影响，优化了工艺条件；利用X射线衍射仪（XRD），扫描电子显微镜（SEM），比表面积测试（BET）等手段对催化剂进行了表征。 研究结果表明：共沉淀法更适合铜铈催化剂的制备；采用水合肼、氢氧化钠双沉淀剂制备的CuO/CeO2催化剂较其他方法制备的催化剂的催化活性高，制备工艺简单，易于放大；采用双沉淀剂，CuO的负载量为10%，焙烧温度500℃时催化剂表现出最佳的活性；在空速为1200h-1和反应温度为95℃时，O2/CO比为1：1时，CO转化率和选择性分别达到了99.98%和94.90%。 本文首次采用双沉淀剂制备的铜铈催化剂在富氢气气氛下对CO优先氧化的催化活性和选择性高于文献报道的贵金属催化剂以及其他铜铈催化剂。在上述最优条件下，CO含量可降至10ppm以下，最低可降至 0 ppm以下。完全符合质子交换膜燃料电池对氢源的要求。 谢谢你们了 [ Last edited by woommoow on 2008-6-19 at 22:58 ] |
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zhanglizhi
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woommoow(金币+2,VIP+0):xiexiele
woommoow(金币+2,VIP+0):xiexiele
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金山快译，虽然错误很多很多，但是发给楼主希望能有一点点用： The 醇 system hydrogen,the hydrocarbon system hydrogen etc. system hydrogen technique is the point of the current fuel cell hydrogen source technique development research, although the research of the recent years obtain can pleased progress, the CO content in the product air is high, cleaning a difficulty to influence these indeed and directly technical extensively applied. This text compared to study the copper 铈 to fasten the making of the catalyst systematically and the CO have the initiative a catalyst to oxidize process under the rich hydrogen body atmosphere. Investigated to dissolve a gum gel method,immerse a 渍 method,the machine mixture method and precipitate a method four kinds of applicabilities of load methods totally, and the first time precipitate a making copper 铈 catalyst by compound;Investigated Cu/Ce to go together with a ratio,load quantity and bake to burn temperature etc. the making condition to catalyst activity of influence;The evaluation of pass the activity sieved catalyst;Pass a single factor experiment and was hand over an experiment to investigate to respond the craft conditions, such as temperature,airspeed and the oxygen carbon ratio...etc. to the influence that the CO has the initiative to oxidize, excellent turn a craft condition;Make use of the X shoots the line 衍 to shoot an instrument(XRD), scanning electronic microscope(SEM), comparing surface to accumulate a test(BET) etc. the means carried on token to the catalyst. Study the result enunciation  recipitates the making that the method suits the copper 铈 catalyst more totally;Adopt the water matches the catalyst activity of the catalyst that the 肼 ,hydrogen oxidizes other method makings of the 钠 double CuO/CeO2 catalysts that precipitates a makings high, make a craft simple, be easy to enlarge;Adopt the double precipitates, the CuO load measures to 10%, the catalyst expresses a best activity while baking to burn temperature 500 ℃s;At the airspeed is the 1200 hs-1s and the reaction temperature for 95 ℃s, the O2/CO compares to 1:1:00, the CO conversion rate and selectivity come to a 99.98% and 94.90% respectively. This text first time adoption double copper 铈 catalyst that precipitate a making has the initiative to oxidize to the CO under the rich hydrogen atmosphere of the catalyst activity and selectivity is high in the precious metal catalyst and other copper 铈 catalysts of the cultural heritage report way.Under above-mentioned superior condition, the CO content can decline to a 10 ppm following, lowest can decline to a 0 ppm as follows.Meet the proton commutation film fuel cell's request for the hydrogen source completely. |
5楼2008-06-20 02:06:14
方丈911
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2楼2008-06-19 23:07:01
lm_nudt
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3楼2008-06-19 23:08:31
4楼2008-06-20 00:27:30
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