<small id="mxhh4"><thead id="mxhh4"></thead></small><tt id="mxhh4"><menu id="mxhh4"></menu></tt>
    1. <blockquote id="mxhh4"></blockquote>
    2. <blockquote id="mxhh4"></blockquote>

    3. 首頁 > dilute
      全部論文
      電力論文   |   建筑論文  |  機械論文  |  化工論文  |  石油論文  |  冶金論文  |  礦產論文  |  材料論文  |  電子論文  |  航空航天論文  |  通信論文  |  計算機論文  |  水利論文  |  地質論文  |  鐵道論文  |  汽車論文  |  管理論文  |  農業論文  |  食品論文  |  醫學論文  |  海洋論文  |  船舶論文
      • Sorghum as Dry Land Feedstock for Fuel Ethanol Production

        Dry land crops such as sorghums(grain sorghum,sweet sorghum and forage sorghum)have been identified aspromising feedstocks for fuel ethanol production.The major issue for using the sweet sorghum as feedstock is its stability at room temperature.At room temperature,the sweet sorghum juice could lose from 40%to50%of its fermentable sugars from 7to14 days.No significant sugar content and profile changes were observed in juice stored at refrigerator temperature in two weeks.Ethanolfermentation efficiencies of fresh and frozen juice were high(-93%).Concentrated juice(≥25%sugar)had significantly lower efficiencies and large amounts of fructose left in finished beer; however,winery yeast strains and novel fermentation techniques maysolve these problems.The ethanol yield from sorghum grain increased as starch content increased.No linear relationship betweenstarch content and fermentation efficiency was found.Key factors affecting the ethanol fermentation efficiency of sorghum includestarches and protein digestibility,amylose-lipid complexes,tannin content,and mash viscosity.Life cycle analysis showed a positivenet energy value(NEV)=25 500 Btu/gal ethanol.Fourier transform infrared(FTIR)spectroscopy and X-ray diffraction(XRD)were used to determine changes in the structure and chemical composition of sorghum biomasses.Dilute sulfuric acid pretreatment waseffective in removing the hemicellulose from biomasses and exposing the cellulose for enzymatic hydrolysis.Forage sorghum ligninhad a lower syringyl/guaiacyl ratio and its pretreated biomass was easier to hydrolyze.Up to 72% hexose yield and 94% pentoseyield were obtained by using a modified steam explosion with 2% sulfuric acid at 140"C for 30 min and enzymatic hydrolysis withcellulase....

        2020-10-22 17:35:41瀏覽:20 diluteacidpretreatmentdrylandfeedstockFTIRfuelethanolsorghumXRD

        查看
      • 玉米芯稀酸預處理和分步糖化與發酵工藝生產燃料乙醇的中試研究

        利用正交試驗在中試水平考察了玉米芯的稀硫酸預處理和分步糖化與水解生產乙醇的工藝。結果:最佳預處理工藝為稀硫酸濃度1.1%,溫度120℃,固液比1∶8,時間3 h;酶解糖化最佳工藝為:起始底物濃度180 g/L,濾紙酶活:纖維二糖酶活=20 IU/g底物:7 IU/g底物,pH=5.0,48 h;利用運動發酵單胞菌發酵酶解液,35℃,48 h,發酵液中乙醇濃度最高67.8 g/L。...

        2020-09-30 09:14:00瀏覽:37 燃料乙醇中試生產玉米芯稀酸預處理分步水解與發酵fuelethanolproductionPilotscalecorncobdilute

        查看
      • 燃料乙醇制備中稀酸預處理棉花秸稈條件優化

        為了高效利用棉花秸稈制備燃料乙醇,用稀酸法對棉花秸稈進行預處理.通過單因素試驗和二次正交旋轉組合設計分析,建立處理溫度、時間、硫酸體積分數試驗因素與木糖含量之間的回歸模型,優化工藝條件.結果表明,回歸模型高度顯著,R2 =0.9251,模型具有預測意義.各試驗因素影響主次順序為硫酸體積分數、處理時間、處理溫度,稀酸預處理棉花秸稈的優化條件為處理溫度133.5℃、時間2.0h、硫酸體積分數3.5%,此條件下濾液中木糖濃度達6.865g/L.通過對處理前后棉花秸稈纖維結構的SEM圖觀察,表明稀酸預處理可有效打破木質纖維素的結晶結構,降低木質素的束縛作用....

        2020-09-30 09:14:00瀏覽:15 棉花秸稈稀酸木糖二次正交旋轉組合設計cottonstalksdiluteacidxylosequadratic

        查看
      • 雙乙烯酮的環保生產

        以醋酸為原料經催化、裂解脫水是目前國內外制取雙乙烯酮、醋酐等產品的主要生產方法,由于醋酸裂解生成-分子的水致使生產過程中會有大量稀醋酸產生,為了回收利用稀醋酸,稀醋酸提濃將會產生較大量的廢水。目前國內雙乙烯酮產品收率基本上維持在80%左右(以醋酸計).損失的20%中約50%為雙乙烯酮精餾殘渣,另有50%為醋酸裂解的副反應生成一氧化碳、二氧化碳等氣體所消耗,科學合理地利用好雙乙烯酮生產過程中產生的廢水、廢氣、廢渣是雙乙烯酮環保生產的主要研究方向。...

        2020-09-25 09:10:57瀏覽:27 雙乙烯酮醋酸裂解稀酸提濃環保生產三廢利用Diketeneaceticacidcrackingconcentrationofdilute

        查看

      能化大數據平臺 ©2010-2022 All Rights Reserved.  
      滬ICP備14007155號-3 網站地圖 化工熱詞舊版本
      關于我們| 會員說明| 廣告合作| 聯系我們| 免責聲明| 投稿須知|

      能源化工大數據平臺-煤化工網二維碼
      在線客服
      服務郵箱

      服務郵箱

      cnmhg168@163.com

      微信咨詢
      微信
      返回頂部
      X我的網站名稱

      截屏,微信識別二維碼

      微信號:anquanhun

      (點擊微信號復制,添加好友)

        打開微信

      微信號已復制,請打開微信添加咨詢詳情!
      [!--page.stats--] 被公玩弄的年轻人妻

      <small id="mxhh4"><thead id="mxhh4"></thead></small><tt id="mxhh4"><menu id="mxhh4"></menu></tt>
        1. <blockquote id="mxhh4"></blockquote>
        2. <blockquote id="mxhh4"></blockquote>