迈特尔膜技术有限公司

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    天然气领域中脱除二氧化碳

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    从天然气中去除CO2 /CO2 REMOVAL FROM NATURAL GAS

    1. 详细信息

    问题

    很多地区的天然气气源中都存在CO2 CO2的存在会导致设备和管道的腐蚀,并且CO2含量过高会造成天然气热值降低。因此,天然气在通过长输管线输送前必须脱除其中的CO2以满足技术指标规定要求。同时,要求CO2脱除技术能够适应偏远、无人或海上等工作环境;并且应具有操作简单、启动快、高运转、低设备投资费用和操作费用。目前,天然气脱碳应用最广泛的是醇胺法。但醇胺法流程复杂,设备成本、操作费用和安装费用均较高;而且需要较高的燃料费用,二次污染也很难完全避免。


    Polaris™解决方案

    Polaris™膜能提供一种简单、低成本和结构紧凑的天然气脱碳方案。相比于常规膜,Polaris™膜对天然气中各种物质有独特的高分子化学特性。Polaris™膜仅需要极少的气体预处理,并且分离效率极高,对天然气中烃的回收率高达95%以上。Polaris™膜能脱除天然气中大部分的CO2以满足对CO2含量的技术指标规定要求。Polaris™膜工艺流程简单,装置结构紧凑,使海上平台安装所需加甲板的空间和重量最小化。


    优点

    ■ 降低二氧化碳含量到所需规格 (<2mol% 或最优水平)
    ■ 膜超强的化学性能,只需有限的预处理
    ■ 独特的工艺设计,最大限度地提高碳氢化合物的回收率
    ■ 高效的封装可以减少空间和重量,是海上应用的理想产品
    ■ 安装简单,低成本。 在许多情况下,单个撬装系统可以在几个小时内完成

    ■ 在二氧化碳含量过高的环境下,膜的性能稳健可靠

    ■ 无需定期维护,没有移动部件,专为远程无人操作设计
    ■ 运行时间长、收益最大化

    Problem

    CO2 is found in natural gas in many locations and must be removed to meet specifications before the gas can be delivered to the pipeline. Availability of a simple process technology that can be applied in remote, unattended, or offshore situations is highly desirable. Ease of operation, quick start-up, and high on-stream factors are needed in addition to competitive capital and operating costs. Amine systems are used frequently but are complex and have high capital, operating, and installation costs; a relatively high fuel cost and potential environmental issues.

    Polaris™ Solution

    Polaris™ membrane based systems provide a simple, low-cost, compact  solution for reducing CO2 content in natural gas. These novel membranes have a unique polymer chemistry that is far superior to conventional membranes in withstanding the various components in natural gas. The membranes require minimal gas pretreatment and offer very high efficiency separation, with more than 95% hydrocarbon recovery achievable.
    These membranes are used for achieving pipeline CO2 specifications of  4 mol% or less or for bulk CO2 removal. Due to the high fluxes of these membranes and efficient module packaging, using Polaris™ membrane process minimizes required deck space and weight in offshore installations.

    Benefits

    ■  CO2 content reduced to required specifications (<2 mol%  or optimal levels)

    ■  Limited pretreatment required  due to robust membrane chemistry

    ■  Unique process design to maximize total hydrocarbon recovery

    ■  High-efficiency packaging minimizes space and weight, making the units ideal for offshore applications

    ■  Easy, low-cost installations.  In many cases, single skid systems  can be installed in hours

    ■  Robust, proven membrane performance at high CO2 contents

    ■  No regular maintenance,  no moving parts, and designed for remote unmanned operation

    ■  High on-stream times  maximize revenues