双河油田黄草湾区长6油层组储层特征

双河油田黄草湾区长6油层组沉积期内发育三角洲前缘亚相,储集岩以水下分流河道和河口坝沉积的砂体为主.化验资料表明,该地区储层主要为长石砂岩和岩屑长石砂岩,储集空间主要为次生孔隙和原生粒间孔;储层物性具有低孔、低渗的特点;排驱压力和饱和度中值压力较高,孔喉半径小且分选性较差,溶蚀作用对改善喉道连通性的效果不佳,孔隙结构参数总体较差.结合地区沉积特征分析认为储层物性在水下分流河道砂体中较好,河口砂坝次之.     

靖边沙沟地区延9油层组沉积微相研究

沙沟地区位于鄂尔多斯盆地伊陕斜坡中部,延9油层是其主力油层.根据大量岩心及测井曲线分析,研究区为三角洲平原沉积相,可进一步识别出分流河道、分流间湾和决口扇微相,其中分流河道微相是重要的油气富集区,是今后勘探开发的重点.     

我国氯化钾生产工艺概述

分析我国钾肥现状和青海盐湖工业股份有限公司钾盐储量及生产现状;介绍青海盐湖股份采用冷分解浮选法、反浮选冷结晶法和兑卤冷结晶法生产氯化钾的工艺流程、生产方法和技术指标;提出我国需建立钾肥战略储备机制,引进国外钾盐先进技术,以增强钾肥的国际竞争力。     

纳米二氧化硅/凹土复合材料的制备以及吸附性能

以硅酸钠为主要原料,用硫酸调节pH,通过液相沉淀法在凹土单晶表面原位生成纳米粒状二氧化硅,制备纳米二氧化硅/凹土复合粉体。利用XRD、TEM、TG-DTG、氮气吸附脱附曲线等方法对复合粉体进行表征。XRD表明,二氧化硅以非晶态的形式包覆在凹土表面,防止了凹土的团聚。TEM照片显示,包覆后的纳米二氧化硅粒径减小,粒度分布均匀,表面光滑。     

Dispersed ZrO2 nanoparticles in MCM‐48 with high adsorption activity

A new two‐step synthesis of ZrO₂‐MCM nanocomposites using the gel combustion technique was accomplished; the resulting material had a high‐surface area and showed very high adsorption activity. The deposition of 2–5 nm ZrO₂ particles over MCM was achieved using gel combustion technique with glycine as a fuel, and the formation of nanocomposites was confirmed using transmission electron microscopy. The composites were also characterized by XRD, SEM, FTIR and N₂ adsorption‐desorption analysis. The nanocomposites were tested for the adsorption of cationic dyes. High rates of adsorption and large dye uptake were observed over the nanocomposites. The rate of adsorption over the nanocomposites was higher than that observed for physical ZrO₂‐MCM mixtures and commercial activated carbon. The nanocomposite with 10 wt % ZrO₂ showed the highest rate of adsorption owing to the synergistic effects of ZrO₂ surface groups, smaller particle size, fine dispersion and high‐surface area of the composite. © 2012 American Institute of Chemical Engineers AIChE J, 58: 2987–2996, 2012     

浅析鄱阳湖湖泊面积缩小成因及对策

2011年鄱阳湖面临严重干旱,湖面面积急剧下降,公众给予巨大关注。本文在数据分析与对比的基础上,从自然与社会经济因素等方面分析了造成这一现象的原因,并在此基础上提出对策及建议,为有关部门提供参考。     

Effect of Sonication in the Preparation of Activated Carbon Particles on Adsorption Performance

The impact of acid and base adsorption capacities of activated carbon (AC) particles with activation condition, contact time, specific surface area (SSA), particle size, concentration, and temperature was studied. AC was pre-treated by sonication to improve the surface characteristics and enhance its adsorption capacity. Sonication increased the SSA of AC. SEM imaging showed good dispersion and uniform AC particles with an average diameter of about 0.6 μm. The adsorption results demonstrated that AC surfaces possessed effective interactions with acids and bases, and the greatest adsorption capacity was achieved with CH₃COOH, where data were analyzed by Freundlich and Langmuir isotherms. It was found that the isotherm data correlated well with the Freundlich isotherm. Adsorption of raw AC particles increased under sonication conditions. The adsorption process with sonicated and unsonicated AC particles obeyed pseudo first-order kinetics.     

Study of Catechol and Resorcinol Adsorption Mechanism through Granular Activated Carbon Characterization,pH and Kinetic Study

The present article reports results of the studies on adsorptive removal of catechol and resorcinol from aqueous solution by granular activated carbon (GAC). Physico-chemical characterization including surface area, X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR) of the GAC before and after catechol and resorcinol adsorption have been done to understand the adsorption mechanism. Bulk density and heating value of GAC were found to be 725 kg/m³ and 8.26 MJ/kg, respectively. The BET surface area was 977.6 m²/g whereas the BET average pore diameter was 18.79 Å. Different experimental parameters like initial pH, initial dosage, contact time, and initial concentration were evaluated for their effect on the adsorption of catechol and resorcinol onto GAC. The kinetics of adsorption was found to be described by the pseudo-second order equation. Results of the intra-particle diffusion model show that the pore diffusion is not the only rate limiting step. The effective diffusion coefficient of catechol and resorcinol were of the order of 2.9 × 10^?10 and 2.2 × 10^?10 m²/s.     

天然气吸附存储用高比表面积活性炭研究进展

综述了物理法、化学法和化学-物理法制备高比表面积活性炭的研究进展,归纳了多粒径混装、粘结剂压制和无粘结剂压制成型3种降低空间体积,提高活性炭颗粒密度的成型方法,介绍了成型活性炭在天然气吸附存储中国内外研究进展,讨论了天然气吸附剂存在的问题、不足以及相应的解决方法。     

撞击流微反应器气液传质研究

在T型对撞反应器的基础上,对其结构进行改进,设计了旋流锥型对撞、T型旋撞和旋流锥型旋撞(二次旋转)3种撞击流反应器。用化学吸收法测量了这几种不同结构的微反应器在气液二相逆流接触条件下平均相界比表面积α及液相吸收传质系数kL;进而分析了反应器进口结构、尺寸和流体流量等条件对传质性能的影响。结果表明:旋撞比直撞的传质系数大,二次旋撞的比一次旋撞的传质系数要大;撞击区进口尺寸越小,气液流体的流量越大,反应器的传质系数越大;液相传质系数较常规气液接触设备的至少高1—2个数量级,其传质强化的原因主要源于微反应器内相界比表面积大幅度地增加。