炼焦煤副产品价值预测方法

焦化副产品价值与副产品热值间存在线性关系,可以通过建立炼焦煤性质与副产品热值的关系推测出每种炼焦煤的副产品价值和炼焦煤的净价格(煤炭价格—副产品价格)。这种炼焦煤副产品价值预测方法在实际优化配煤成本时可以综合考虑炼焦煤的价值,有助于选择净价格更低的炼焦煤。     

Polymer Electrolytes Based on Polymeric Ionic Liquid Poly(methyl 2-(3-vinylimidazolidin-1-yl)acetate bis(trifluoromethane sulfonyl)imide)

A new kind of ionic liquid monomer methyl 2-(3-vinylimidazolidin-1-yl)acetate bromide (MVIm-Br) and polymeric ionic liquid (PIL), poly(methyl 2-(3-vinylimidazolidin-1-yl)acetate bis(trifluoromethanesulfonyl)imide) (PMVIm-TFSI), were synthesized and characterized. Different compositions of polymer electrolytes were prepared by blending PMVIm-TFSI and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) with poly(methylmethacrylate-co-vinyl acetate) (P(MMA-VAc)). The thermal stability and ionic conductivity improved significantly when PMVIm-TFSI was added into P(MMA-VAc)/LiTFSI polymer. For the polymer electrolytes obtained, the highest ionic conductivity at 30 °C is 4.71 × 10⁻⁴ S cm⁻¹ and the corresponding decomposition temperature is ca. 308 °C. Moreover, P(MMA-VAc)/PMVIm-TFSI/LiTFSI electrolyte membrane (transmittance ≥90%) can be used as the ion-conductive layer material for electrochromic devices, which reveal excellent electrochromic performance.     

Separation of Monoester and Diester in the Esterification Product of Polyethylene Glycol and Acrylic Acid by the Weibull Method

In the extraction system of ethyl acetate and NaCl aqueous solution, partition coefficients of polyethylene glycol mono-acrylate (PEGmA) and polyethylene glycol di-acrylate (PEGdA) varied with temperature and concentration of NaCl solution were studied. The best separation condition of PEGmA and PEGdA was determined on that basis. Results of the testing showed that partition coefficients of PEGmA and PEGdA sharply increased with rising concentration of NaCl solution and temperature. Since the incremental degrees of PEGmA and PEGdA were different from each other, the ratio of partition coefficient (K _PEGdA/K _PEGmA) reached a maximum under the conditions of 20 °C and 5 mol L⁻¹ NaCl. The best separating condition was as follows: PEGdA was extracted out with ethyl acetate by adding 5 mol L⁻¹ NaCl at 20 °C. After three repetitions, the recovery rate of PEGdA reached 99.8%. The water phase was heated to 50 °C and PEGmA was extracted out with ethyl acetate. The recovery rate of PEGmA amounted to 68.8% by three repetitions. After washing and drying, the purity of PEGmA and PEGdA was 99.7 and 98.7% respectively.     

镁合金AZ61碱性阳极氧化工艺研究

文章用正交试验对镁合金AZ61的碱性阳极氧化工艺进行了优化研究,对优化条件下得到的氧化膜进行了耐蚀性能和物相分析。封孔氧化膜的主要成分是Mg（OH）2、MgSiO3、Mg0.36Al2.44O4,能够在镁合金表面形成致密膜,膜厚可达30μm,且实行封孔阻塞了腐蚀介质到达基体的通路,从而能保证氧化膜具有较强的防腐蚀性。     

橡胶低温粉碎技术综述

随着我国经济的发展和汽车工业的兴起,橡胶消耗量及废旧轮胎产量正逐年上升。我国每年70%以上的天然橡胶和40%以上的合成橡胶需依赖进口,回收废旧橡胶生产胶粉,既可以作为橡胶原料的补充,又可以缓解"黑色污染"引发的环境问题。介绍了废旧橡胶回收利用方式,提出低温粉碎法是生产精细胶粉的发展方向。通过对液氮冷冻粉碎法、空气冷冻粉碎法和LNG冷能低温粉碎法的比较,提出直接或间接利用LNG冷能低温粉碎生产胶粉,可以降低胶粉生产成本,带动废旧橡胶循环利用产业发展。     

玻璃行业窑炉余热利用与烟气环保治理一体化的研究与应用

随着国家"十二五"对节能减排的深入推进,玻璃作为高耗能、高污染的行业被国家纳入控制范围中,受玻璃生产特点和烟气特点的制约,一直以来,如何将窑炉的节能与减排有效地结合起来,是一项有利于国家、有利于社会,也有利于企业健康发展的重要课题。本文重点结合玻璃生产实际案例进行分析,提出有效的解决办法。结果表明,将窑炉的余热利用发电、窑炉烟气的脱除NO、脱除SO、除尘一体化的方案是未来玻璃行业的必然选择。X2     

Synthesis and characterization of MQ silicone resins

MQ silicone resins, which represent a broad range of hydrolytic condensation products of monofunctional silane (M) and tetrafunctional silane (Q), were synthesized by reaction of water glass with hexamethyldisiloxane. The optimum reaction time and the optimal reaction temperature is 30 min and 30–40°C, respectively. Concentrated hydrochloric acid is the best one among those catalysts tested. In large-scale experiments (420–1680 mL), the favorable feeding order is catalyst first, and then water glass, the mixture of hexamethyldisiloxane and ethanol last and most MQ silicone resin was observed. The structure of MQ silicone resin was characterized by FT-IR and GPC spectra. The MQ silicone resin shows narrow molecular weight distribution and the number average molecular weight of MQ silicone resin is 2917. The silicone pressure sensitive adhesive prepared from as-synthesized MQ resin has good tack (29#) and 180° peel adhesion (5.630N/20 mm). © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

Synthesis of nitrogen-doped porous graphitic carbons using nano-CaCO3 as template,graphitization catalyst,and activating agent

Nitrogen-doped porous graphitic carbons (NPGCs) with controlled structures were synthesized using cheap nano-CaCO₃ as template, melamine-formaldehyde resin as carbon precursor, and dilute HCl as template removing agent. In addition to its use as a template, the nano-CaCO₃ acted as an internal activating agent to produce micro- and mesopores, as an adsorbent to remove the released hazardous gases (i.e. HCN, NH₃), and as a mild graphitization catalyst. The obtained NPGCs with hierarchical nanopores contained as high as 20.9 wt% of nitrogen, had surface areas of up to 834 m² g^–1, and also exhibited high thermal stability with respect to oxidation. Using carbohydrate or phenolic resin as the carbon precursor, this simple approach was also capable of producing hierarchical porous graphitic carbons with high surface area (up to 1683 m² g^–1) and extremely large pore volumes (>6 cm³ g^–1). X-ray diffraction and infrared spectroscopy suggested that the intermediate CaCN₂ or CaC₂ generated during the carbonization plays a critical role in the formation of the graphitic structure.     

In situ measurement of the transport processes of corrosive species through a mortar layer by FTIR-MIR

Fourier Transform Infrared Spectroscopy with Multiple Internal Reflection mode (FTIR-MIR) has been applied for the first time to in situ follow the transport process of corrosive species through a mortar layer and their accumulation at the internal reflection element (IRE)/mortar interface. The kinetic processes of H₂O and SO₄^2? transport through the mortar specimens with different curing time were studied. The results indicated that H₂O and SO₄^2? presented different transport behavior through the mortar layer. Adding Na₂SO₄ into distilled water resulted in a slower transport rate of H₂O. And the curing time of mortar had a significant effect on its permeability. The in situ FTIR-MIR measurement was proved to be able to provide reliable information on the interface and the transport process through mortar.     

Preparation of Platinum‐Poly(O‐dihydroxybenzene) Composite Catalyst and Its Electrocatalytic Activity Toward Methanol and Formic Acid Oxidation

A composite catalyst has been successfully prepared by dispersing Pt nanoparticles on a poly(o‐dihydroxybenzene) (PoDHB) modified glassy carbon (GC) electrode and characterized by SEM, EDX, and electrochemical analysis. Compared with Pt nanoparticles deposited on the bare GC, the Pt/PoDHB/GC exhibits higher catalytic activity and stronger poisoning tolerance for electro‐oxidation of methanol and formic acid. The enhanced performance could be attributed to the increase of electrochemical active surface area (EASA) arisen from the PoDHB modification. Furthermore, performance limiting factors such as platinum loading, polymer mass, H₂SO₄, methanol, and formic acid concentrations have been evaluated for optimizing the electrocatalytic activities.