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以食用型向日葵籽壳为原料,采用湿氧化预处理和同步糖化发酵法制备生物乙醇,并通过正交实验确定了二者最佳工艺条件。结果表明,前者最佳工艺条件为:反应温度190℃,氧气压强1.2 MPa,过筛干燥后的向日葵籽壳/混合溶液(质量体积比)1∶10,时间15 min;后者最佳工艺条件为:反应温度40℃,纤维素酶用量30 U/g,p H值4.8,酵母接种量8%。在此条件下,纤维素转化率为83.66%,光密度为0.995,含糖量为243.3 mg,生物乙醇收率为18.04%。 相似文献
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利用氢氧化钠对产自山东胶东丘陵地区的普通型丛生花生壳进行预处理,通过同步糖化发酵制备生物乙醇.通过四因素三水平正交实验获得氢氧化钠预处理的最佳条件:料液比(花生壳与水的质量体积比)为1:30,反应温度90℃,反应时间30 min,氢氧化钠用量2%,其含糖量为252.2 g;同步糖化发酵最佳工艺为:pH值5.2,反应温度... 相似文献
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煤层气属于非常规天然气,它的产能受多种因素影响,数值模拟过程复杂且资料难以获得。通过选取3种产量动态预测分析方法(Weibull模型法、广义翁氏模型法和H-C-Z模型法),并进行对比分析,结果认为:H-C-Z模型法由于模型中的线性关系与煤层气开采机理不吻合,预测误差较大;广义翁氏模型法虽然拟合峰值产量有较高准确度,但其拟合峰值产量时间误差较大,难以满足精度要求;Weibull模型法对峰值产量及其出现时间的拟合精度均较高。因此Weibull模型法更适合预测煤层气产量。 相似文献
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V. F. Tret’yakov R. M. Talyshinskii A. M. Ilolov A. D. Budnyak 《Petroleum Chemistry》2016,56(3):224-229
The catalytic process of two-stage conversion of ethanol into jet fuel, wherein the second step is the hydrogenation of aromatic hydrocarbons obtained in the first step, has been studied. It has been shown that at 400°C and an ethanol space velocity of LHSV = 2 h–1, aromatic hydrocarbons are produced, which are hydrogenated on a Pt/C catalyst in an autoclave at 80–100 atm and T = 200–250°C for 1.5 h with a final yield of naphthenic hydrocarbons on a fed ethanol basis of 15–20%. 相似文献
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M. G. Shalygin A. A. Kozlova A. I. Netrusov V. V. Teplyakov 《Petroleum Chemistry》2016,56(10):977-986
Pervaporation and vapor-phase membrane separation methods for the recovery of bioalcohols from dilute aqueous solutions have been critically compared. The importance of taking into account the liquid–vapor equilibrium diagram in studies on the separation of binary aqueous–alcoholic liquid media by these methods has been shown. Previously published experimental data on the transport of water, ethanol, and n-butanol vapors in hydrophobic membranes based on the glassy polymers poly(vinyltrimethylsilane) (PVTMS), poly(1-trimethylsilyl-1-propyne) (PTMSP), and poly(4-methyl-1-pentyne) (PMP) have been analyzed. Schemes of butanol and ethanol recovery by the vapor-phase membrane separation process from fermentation broths for the cases of application of water-selective and alcohol-selective membranes have been presented, as well as the results of mathematical simulation of the process and assessment of energy consumption. 相似文献
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胡尖山油田随着开发规模的扩大,优质储量不断动用,油田地面注水不能及时配套,使现代油藏管理工作很困难。本文从不同类型油藏特征分析入手,提出了油藏提高单井产能方法。 相似文献
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Xiangfeng Zhang Hongbin Yang Zhou Zhu Pengxiang Wang Xia Yin Changxiao Cao 《Petroleum Science and Technology》2013,31(19):1544-1551
AbstractAmphiphilic polymers applied in oil fields are polymer mixtures with different molecular weight. Stability of O/W emulsion prepared by amphiphilic polymers with different molecular weight was studied by stability analyzer. The difference in stability was clarified according to the external phase and interfacial properties. Results showed that PI(micro-molecular polymer) formed a tighter network structure in solution which exhibit higher viscoelasticity and more resistant to shear; and was more favorable to the emulsion stability than PII(macro-molecular polymer) due to higher surface activity. This work provides references for the molecular weight distribution optimization of amphiphilic polymer. 相似文献
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分别采用浸渍法,离子交换法,共沉淀法和蒸氨法制备相同铜硅比的Cu/SiO_2催化剂,在固定床上评价不同方法制备的催化剂对甲醇裂解制氢的影响。发现在260℃,2MPa,LHSV为0.9h~(-1)的最佳工艺条件下,蒸氨法制备的SAM催化剂甲醇转化率最高为93.3%,裂解气中氢气物质的量分数为74.81%。通过BET,XRD,H_2-TPR,NH_3-TPD手段进行表征,发现SAM催化剂上的Cu负载量最高、分散度最好,表面的总酸位点最少,Cu与载体之间的作用力合适,有利于甲醇的裂解。 相似文献
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载体对甲烷直接氧化制合成气的影响 总被引:12,自引:2,他引:12
研究了10%NiO担载在5种不同载体(α-Al_2O_3、ZrO_2、SrTiO_3、SiO_2、TiO_2)上制备的催化剂样品对甲烷直接氧化制合成气的影响。主要考察了催化剂的活性和抗积炭性能。程序升温还原(TPR)、X射线衍射(XRD)和CO_2程序升温脱附(TPD)实验结果表明该系列催化剂的活性顺序为:Ni/α-Al_2O_3>NiO/ZrO_2>NiO/SrTiO_3>NiO/SiO_2(?)NiO/TiO_2。TPR结果显示NiO与不同载体之间经800℃焙烧都有不同程度的相互作用,但是强相互作用(如NiO与TiO_2生成了新相NiTiO_3)对催化活性不利。TPD表明催化剂表面相对较强的碱中心有利于甲烷分子的活化,并能增加催化剂抗积炭性能。 相似文献
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