However, some problems, such as low electrocatalytic activity of the anodic catalyst restrict its practical use.

然而，陽極催化劑的低催化活性等問題限制了DMFC的實際應(yīng)用国产大学生A片三区在线。

Under the conditions of stir speeds 400 r·min~(-1) and distance between anode and cathode 1 mm, by using the orthogonal design, the optimum technological conditions were found that the current density was 0.3 A·cm~(-2), initial NaOH concentration in catholyte was 50 g·L~(-1), reaction times of two steps were all theoretical electrochemical reaction times. In the first electrosynthesis, initial Na_2CrO_4 concentration in anolyte was 650 g·L~(-1), and reaction temperature was 80℃. In the second electrosynthesis, initial Na_2Cr_2O_7 concentration in anolyte was 700 g·L~(-1), and reaction temperature was 85℃.

324全氟磺酸增強(qiáng)復(fù)合陽離子交換膜性屋视频在线、陰陽極液中攪拌速度均為400r·min~(-1)條件下色综合久久久久久久久五月，通過正交實驗得到優(yōu)化工藝條件為：電流密度0.3A·cm~(-2)色婷婷第一页，陰極液氫氧化鈉初始濃度50g·L~(-1)，兩步反應(yīng)時間均為理論電催化反應(yīng)時間日本在线观看视频网站，第一步陽極液鉻酸鈉初始濃度650g·L~(-1)一级啪啪啪免费视频，反應(yīng)溫度80℃，第二步陽極液重鉻酸鈉初始濃度700g·L~(-1)真实国产激情在线观看网站视频，反應(yīng)溫度85℃国产精品欧美在线极品。

Deuteration of anthracene using MoCl5 as a catalyst proceeded within 24 h at room temperature.

MoCl5催化的蒽的氫氘交換反應(yīng)在室溫下24小時完成。

In this thesis, an integrated process of epoxidation of propylene catalyzed by TS-1 and production of hydrogen peroxide by anthraquinone route was studied.

本文對TS-1催化丙烯環(huán)氧化與蒽醌法生產(chǎn)H〓O〓的過程集成進(jìn)行了研究欧美日本高清在线不卡视频。

To a certain extent, The governmental behavior of these two states also catalyzes the rise of French anti-Americanism.

此外亚洲色婷婷综合开心网，行為的視角揭示了冷戰(zhàn)后法國反美主義浪潮的內(nèi)外催化因素。

The cyclodextrin improves the catalytic reduction efficiency of yeast juice, increases the stereo selectivity for bottom object, improves evidently thepercent conversion of bottom object and the antipode excess value of outcome.

環(huán)糊精提高了酵母液的催化還原效率黄片AAAAA超黄片，同時增加了對底物的立體選擇性两性激情综合网，明顯提高了底物的轉(zhuǎn)化率和產(chǎn)物的對映體過量值。

Through analysis of the components of coking on different parts of desullfur system of single tower and the waste water containing sulfur , we find the cause of coking in the stripping desulur system from single tower is the polymerization reaction of carbohydrate and the separattion of varied solid powders, organic compounds, and all corrosive productions of metal out of waste water in high temperature, therefore,the solving method is how to decrease the oil content ,how to depolymerize form the carbohydrate and how to antisepticize by vapour of waste water.

對單塔脫硫系統(tǒng)中不同部位的垢物及現(xiàn)場催化含硫污水進(jìn)行了分析測定日老女人视频，結(jié)果表明：塔內(nèi)污垢成分及含量隨塔體部位的不同而不盡相同亚洲三级电影网站，單塔汽提脫硫系統(tǒng)中垢物的形成，主要是由于污水中所含各類粉塵亚洲,无码,乱伦、有機(jī)物免费无码又爽又刺激高潮男男、金屬腐蝕物等在高溫下因石油碳?xì)浠衔锏奈龀黾捌鋯误w的聚合反應(yīng)所致。如何降低污水中的含油成分亚洲加勒比黑人一区二区、減少聚合反應(yīng)的生成www18禁、防止污水蒸氣對塔體材料的腐蝕，是阻垢亚洲欧美理论一二区中文字幕、除垢和防垢應(yīng)解決的關(guān)鍵問題亚洲h成视频。

In this paper, the catalytical esterification of palmitic acid with 1 hexadecanol by lipase immobilized by microemulsion base organo gel that consisted of bis (2 ethylhexyl)sodium sulphsuccinate/heptane/water/gelatin in apolar organic solvent was studied.

研究了以AOT二(2 乙基已基琥珀酸酯磺酸鈉/正庚烷/水/明膠組成的反相微乳凝膠固定化脂肪酶，在有機(jī)溶劑中催化棕櫚酸和十六醇的酯化反應(yīng)高清日韩精品更新视频。

But in the process of ion exchange, xylose molecular is easily converted into arabinose because of catalytic isomerization, which results in the decrease of its purity and difficulty of crystal.

木糖是一種在化工欧美最新精品视频在线、食品等領(lǐng)域有著廣泛用途的五碳糖，工業(yè)生產(chǎn)是用稀強(qiáng)酸將玉米芯中含有的大量多縮戊糖分解為單個的木糖分子最近的日韩2019中文字幕在线，然后通過離子交換除鹽毛片最新网址、脫色，精制提取，但在強(qiáng)堿離子交換柱中欧美牲交A欧美牲交aⅴ一，木糖分子容易被部分催化異構(gòu)轉(zhuǎn)化為阿拉伯糖A片黄色免费网站，使得木糖純度下降，結(jié)晶困難拍自拍亚洲手机黄色视频在线观看。

Compared with traditional way,catalytic aromatization of isophorone has been proved to have many advantages.

與傳統(tǒng)工藝相比96sao国产成视频永久免费，異佛爾酮的催化芳構(gòu)化制備3，5-二甲基苯酚方法具有很多優(yōu)點欧美第一页激情视频。