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1.
288 K下Li+,K+//CO2-3,B4O2-7-H2O四元体系的相平衡   总被引:1,自引:0,他引:1  
Solubilities and properties (density, conductivity and pH value) of solutions in the quaternary system Li+,K+//CO2-3,B4O2-7-H2O at 288 K were experimentally studied with the isothermal equilibrium method. The phase diagram of the system consisted of two invariant points E and F, five univariant curves, and four crystallization fields that belonged to K2CO3·3/2H2O,Li2B4O7·3H2O,K2B4O7·4H2O and Li2CO3. The composition of the solution corresponding to E was w(CO2-3)=2.27 %,w(B4O2-7)=6.05 %,w(K+ )=4.30%,w(Li+)=0.30 % and the equilibrium solids were Li2B4O7· 3H2O+K 2B4O7·4H2O+Li2CO3;The composition of the solution for F was w(CO2-3)=22.45%,w(B4O2-7)=1.88%,w(K+ )=29.96%,w(Li+ )=0.03% and the equilibrium solids were K2CO3·3/2H2O+K 2B4O7·4H2O+Li2CO3. K2CO3 possesses strong salting-out effect on K2B4O7,Li2CO3 and Li2B4O7.  相似文献   

2.
以纳米SiOx取代6109硅橡胶用料沉淀法白炭黑,采用传统的硅橡胶混炼方法进行纳米SiOx在其中的分散,可使6109硅橡胶在其他性能数据变化不大的情况下,拉伸强度由原来的4.5MPa提高到6.7MPa,即提高55%。  相似文献   

3.
负载型K2CO3/Al2O3二氧化碳吸收剂的碳酸化反应特性   总被引:2,自引:0,他引:2       下载免费PDF全文
赵传文  陈晓平  赵长遂 《化工学报》2009,60(4):1022-1027
The carbonation characteristics of K2CO3/Al2O3 supported sorbent for CO2 capture was investigated with thermogravimetric apparatus(TGA),X-ray diffraction(XRD),scanning electron microscopy analysis(SEM)and N2 adsorption.The results showed that the carbonation rate of K2CO3 before being loaded on Al2O3 was slow.However,the K2CO3/Al2O3 upported sorbent showed excellent carbonation performance.The difference in carbonation behavior between K2CO3 nd K2CO3/Al2O3 supported sorbent was analyzed from the microscopic view.The analytical reagent K2CO3 sample was of monoclinic crystal structure and could react quickly with H2O in the experimental carbonation environment to produce K2CO3•1.5H2O,which was unfavorable to carbonation reaction.When K2CO3was loaded on Al2O3,the surface area and porosity of the sorbent was improved greatly.So the carbonation properties of the K2CO3/Al2O3 supported sorbent was also improved.  相似文献   

4.
日前,由辛辛那提大学和依科技术有限公司申请的“硅涂料组合及其使用方法”专利是由W·J·范奥伊吉、K·苏里亚纳拉亚南、J·S·甘地、N·BV·西姆哈德里、C·希文,M·B·斯泰西和朱丹青共同发明。  相似文献   

5.
采用布管法连续扩胀装置加工了聚氯乙烯(PVC)环向扩胀管和双向自增强管。实验结果表明,直径从40 mm扩胀到50 mm的环向扩胀管的环向拉伸强度提高了23 %~25 %,环向弹性模量提高了12 %。双向自增强PVC管的环向拉伸强度提高了26 %~33 %,弹性模量提高了30 %~33 %。通过对不同轴向拉伸比的双向自增强管的拉伸强度比较发现,随着轴向拉伸比的增加,环向拉伸强度逐渐提高。,环向弹性模量提高12%。双向自增强PVC管的拉伸强度提高了26%-33%,弹性模量提高了30%-33%。通过对不同轴向拉伸比双向自增强管的拉伸强度比较发现,随着轴向拉伸比的增加,环向拉伸强度逐渐提高。  相似文献   

6.
产品名称单位2006年累计2006年10月同比增长(累计)/%同比增长(本月)/%合成橡胶万t153·4415·0313·004·30顺丁橡胶万t37·663·2815·80-16·80合成纤维万t1500·38156·7211·8011·30锦纶纤维万t68·507·0315·2013·90轮胎外胎万条35784·813730·9617·8014·10子午线轮胎外胎万条14629·881656·2029·0037·10胶鞋万双126930·4814881·5226·1021·30大中型拖拉机台182525·0014495·0029·20-0·70小型拖拉机万台167·5216·39-0·60-8·70汽车万辆620·6161·7925·1035·60载货汽车万辆171·2717·2110·0038·10公路客车万辆1…  相似文献   

7.
The adsorption and mechanism of Re(VII) on resin D318 were studied using chemical methods and IR spectrometry. At pH 5.2, the static and dynamic saturation adsorption capacities were 351.4 and 366.5 mg&;#8226;g&;#61485;1, respectively. The adsorption behavior obeyed the Freundlich empirical equation and the adsorption rate constant k298 was 6.37×10&;#61485;4 s&;#61485;1. The desorption percentage was up to 99.7% when 2.0 mol&;#8226;L&;#61485;1 KSCN was used for dynamic desorption.  相似文献   

8.
微生物燃料电池(MFC)在处理含硝酸盐(NO3--N)废水时具有同时产电和脱氮的潜力,寻找成本低且改善其产电脱氮性能的阴极修饰材料是MFC在含氮废水处理领域应用的关键。氧化亚铜/还原氧化石墨烯(Cu2O/rGO)复合材料具有良好的电化学性能,在替代铂基材料提高MFC性能方面具有一定的应用前景。本研究通过还原法制备了Cu2O/rGO复合材料,并对材料的结构和氧还原性能进行表征;同时,将其负载于阴极碳布后分析其电化学性能,并通过MFC的输出电压、功率密度和NO3--N的去除率探究Cu2O/rGO阴极对MFC产电和脱氮性能的强化作用;通过对反硝化相关酶活性和胞外聚合物的测定,探究Cu2O/rGO阴极强化MFC性能的机理。结果表明:Cu2O/rGO复合材料具有大量的介孔结构,能够为电子传递提供更多的通道,并且Cu2O/rGO复合材料具有良好的氧化还原可逆性;与Pt/C阴极相比,Cu2O/rGO阴极的交换电流密度升高33.53%,电子转移阻力降低65.53%;Cu2O/rGO-MFC在处理NO3-N废水时获得的最大平均输出电压(662.54 mV)、最大功率密度(26.27 mW/cm2)、平均库伦效率(32.02%)和NO3--N去除速率(83.33 mg NO3--N L/h)均高于Pt/C-MFC(485.33 mV,16.98 mW/cm2,7.38%,41.67 mg NO3--N L/h);Cu2O/rGO复合材料通过提高MFC阴极反硝化关键酶活性和类蛋白组分含量,改善了MFC的产电和脱氮性能。  相似文献   

9.
孙攀  李静  解希铭  刘苹 《橡胶工业》2022,69(11):0841-0846
研究在硫黄硫化体系下炭黑N774、环烷油和增粘树脂用量对丁基橡胶(IIR)胶料动态力学性能的影响。结果表明:随着炭黑N774用量的增大,IIR混炼胶的剪切储能模量(G′)和损耗因子(tanδ)增大,硫化胶的损耗峰值[tanδ最大值(tanδmax)]减小,损耗峰值温度[tanδmax温度(Tp)]向高温方向移动;随着环烷油用量的增大,IIR混炼胶的G减小,tanδ增大,硫化胶的tanδmax增大,Tp向低温方向移动;随着增粘树脂用量的增大,IIR混炼胶的G′减小,tanδ增大,硫化胶的tanδ-温度曲线呈双峰形态,Tp向高温方向移动。  相似文献   

10.
The CuO/γ-Al2O3/cordierite catalyst, after being sulfated by sulfur dioxide (SO2) at 673 K, exhibits high activities for selective catalytic reduction (SCR) of nitrogen oxide (NO) with ammonia (NH3) at 573-723 K. The intrinsic kinetics of SCR of NO with NH3 over CuO/γ-Al2O3/cordierite catalyst has been measured in a fixed-bed reactor in the absence of internal and external diffusions. The experimental results show that the reaction rate can be quantified by a first-order expression with activation energy of 94.01 kJ•mol1 and the corresponding pre-exponential factor of 3.39×108 cm3•g1•s1 when NH3 is excessive. However, when NH3 is not enough, an Eley-Rideal kinetic model based on experimental data is derived with Ea of 105.79 kJ•mol1, the corresponding A of 2.94×109 cm3•g1•s1, heat of adsorption ΔHads of 87.90 kJ•mol1 and the corresponding Aads of 9.24 cm3•mol1. The intrinsic kinetic model obtained was incorporated in a 3D mathematical model of monolithic reactor, and the agreement of the prediction with experimental data indicates that the present kinetic model is adequate for the reactor design and engineering scale-up.  相似文献   

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