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Carbon dioxide separation and regeneration study from power plant flue gases with reclaimed magnesium hydroxide.

机译：用回收的氢氧化镁从电厂烟气中分离和再生二氧化碳的研究。

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摘要

A method of inexpensively and reliably separating CO2 from flue gases by means of using magnesium hydroxide (Mg(OH)2) has been studied. Mg(OH)2 may be easily and economically reclaimed from power plants using magnesium enhanced flue gas desulfurization systems (ME-FGD). The CO2 scrubbing system may be operated as either a once-through system which produces magnesium carbonate for sequestration of carbon, or as a regenerable system where a concentrated CO2 gas stream is created for further processing.; The results of experimental investigations and energy considerations are given. The experimental results indicate that CO2 is easily absorbed into solutions containing reclaimed Mg(OH)2.; In addition, a study was undertaken to determine the mass transfer characteristics of the bubble column reactor.{09}A model describing CO2 absorption into clear solutions from a bubble was developed assuming a known bubble size, solution equilibrium chemistry and overall mass transfer coefficients from the gas phase to the liquid. The overall mass transfer coefficients were found to vary from 6.05 x 10-6∼6.63 x 10-7 cm/s for the temperature range of 22°C∼60°C.; Next, this research also include the results of a study using a Turbulent Contact Reactor (TCA) to study the absorption characteristics of CO 2, from a simulated flue gas using sodium hydroxide (NaOH) and magnesium hydroxide (Mg(OH)2) slurries. The results indicated that a lower fluidized velocity, more CO2 absorption using a NaOH solution, but optimum fluidized velocity was required with Mg(OH)2 slurry using this system.; Finally, the energy requirements for CO2 separation were also evaluated for a regenerable system based on equilibrium data in the liquid phase.{09}A liquid solution equilibrium solver, MINEQL+, was used to determine the equilibrium values.{09}The economic evaluation is based on a 500-MW power plant burning a high sulfur coal. These calculations show that approximately 40 to 68 MW of energy are required to separate 7% of the CO2 from the flue gas stream. (Abstract shortened by UMI.)
机译：已经研究了通过使用氢氧化镁（Mg（OH）2）廉价且可靠地从烟道气中分离CO 2的方法。使用镁增强烟道气脱硫系统（ME-FGD）可以轻松而经济地从发电厂回收Mg（OH）2。 CO 2洗涤系统既可以作为生产碳酸镁以隔离碳的直流系统使用，也可以作为可再生系统运行，在该系统中可产生浓缩的CO2气流用于进一步处理。给出了实验研究的结果和能源方面的考虑。实验结果表明，CO2容易吸收到含有再生Mg（OH）2的溶液中。此外，还进行了一项研究来确定鼓泡塔反应器的传质特性。{09}假设已知的气泡大小，溶液平衡化学成分和总传质系数，开发了一个描述从气泡吸收到澄清溶液中的CO2的模型。气相变成液体。在22℃〜60℃的温度范围内，总传质系数为6.05×10-6〜6.63×10-7cm / s。接下来，这项研究还包括使用湍流接触反应器（TCA）研究使用氢氧化钠（NaOH）和氢氧化镁（Mg（OH）2）浆料从模拟烟道气中CO 2的吸收特性的研究结果。 。结果表明，较低的流化速度，使用NaOH溶液吸收更多的CO2，但使用此系统的Mg（OH）2浆料需要最佳的流化速度。最后，还根据液相中的平衡数据对可再生系统的CO2分离所需的能量进行了评估。{09}使用液相溶液平衡求解器MINEQL +来确定平衡值。{09}经济评估是基于一家燃烧高硫煤的500兆瓦发电厂。这些计算表明，从烟道气中分离出7％的CO2大约需要40至68兆瓦的能量。 （摘要由UMI缩短。）

著录项

  • 作者

    Jung, Kyung Sook.;

  • 作者单位

    University of Cincinnati.;

  • 授予单位 University of Cincinnati.;
  • 学科 Engineering Environmental.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 156 p.
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境污染及其防治;
  • 关键词

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