Multi-lump Kinetic Parameter Estimation and Simulation of Trickle-bed Reactor for Ultra-deep Hydrodesulfurization of Diesel

A three-lumping Langmuir-Hinshelwood kinetic model was established based on the structures and reactivities of sulfur compounds.This model described the ultra-deep hydrodesulfurization(UDHDS)performance of diesel,reducing sulfur content from 10000μg/g to less than 10μg/g,with experimental and predicted data showing a discrepancy of less than 10%.The diesel UDHDS reaction was simulated by combining the mass transfer,reaction kinetics model,and physical properties of diesel.The results showed how the concentrations of H2S,hydrogen,and sulfur in the gas,liquid,and solid phases varied along the reactor length.Moreover,the study discussed the effects of each process parameter and impurity concentrations(H2S,basic nitrogen and,non-basic nitrogen)on diesel UDHDS.

全自动平板导热仪的研制与应用

简要介绍了中钢集团洛阳耐火材料研究院研制的全自动平板导热仪的原理、结构、特点和应用。该热导率测试仪的设计基于ASTM C201和GB/T 17911中对于热导率测试的要求,采用先进的测控技术,实现了循环水恒压恒温,测试过程自动控制,数据自动采集,避免了人工调节和测量带来的不确定性和人为误差,提高了控制精度和稳定性,在降低人工成本的同时提高了测试效率。单层试样多温度点测试和多层试样多温度点测试结果表明,本设备在测试过程中可对试样冷热面温度、量热器水温及中心量热器-保护量热器温差进行稳定控制,可实现温差调零的自动调节,极大地提高了测试的准确度。

自体脂肪颗粒与乳房硅胶假体联合治疗乳房过小的临床效果

目的探讨自体脂肪颗粒与乳房硅胶假体联合应用恢复乳房正常解剖体积,塑造乳房形态,预防假体包膜挛缩,创新丰乳手术新方法。方法自体脂肪颗粒提取、纯化后备用。腋下皱襞处切口,长3.0~4.0cm,经皮下隧道钝性分离至胸大肌后间隙,形成植入乳房硅胶假体腔穴。选择相应的规格、类型、体积的乳房硅胶假体,经皮下隧道植入到胸大肌后预制的腔穴内。同期在胸大肌筋膜前乳房各解剖层次进行自体脂肪颗粒移植。植入之自体脂肪颗粒形成伞状结构位于乳房假体浅层表面。结果12例患者经自体脂肪颗粒和乳房硅胶假体联合应用手术治疗后,乳房体积明显增大,形态得以重塑,乳房饱满,无明显包膜挛缩,触觉柔软。术后随诊6个月至3年,临床效果满意。结论植入的自体脂肪颗粒覆盖在硅胶假体表面,具有对乳房组织填充,即时增大乳房体积,促进乳房组织再生,减少或抑制机体对乳房硅胶假体的异物免疫反应,预防和防止乳房硅胶假体包膜硬化挛缩,乳房柔软自然,临床效果安全有效。