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    炼油与合成气领域中合成气H2/CO比例调节

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    合成气过程中的氢分离/HYDROGEN SEPARATIONS IN SYNGAS PROCESSES

    1. 详细信息

    问题
    合成气(H2+CO)可以生产各种产品。每种合成气衍生物的原料合成气都有一个特定的氢碳比使其生产达到最优。然而,合成气的氢碳比取决于合成气的生产工艺过程和原料烃的种类。这个比例不一定是下游产品的最优比例。因此,需要采取一些方法来降低合成气中氢气的含量。

    VaporSep-H2™ 方案

    VaporSep-H2TM提供了一种从合成气中分离氢气来调节氢碳比的简单方法。在一个传统的系统中,原料气首先冷凝以除去其中的可凝烃,然后加热进入膜分离系统。在膜分离系统,氢气优先渗透通过膜,产生净化氢气渗透相和贫氢的比例调节后的合成气。工艺需要时,该比例调节系统甚至可以生产高纯CO作为原料。

    优点

    ■ 合成气氢气回收率: 膜系统通常回收 90%到98% 的原料CO 和纯度 85到95 vol% 的H2
    ■ 经验证的性能: 许多H2 / CO 调整案例, 包括压力高达 130 bar 和使用寿命超过10年的系 统。
    ■ 使用寿命长

    ■ 简单,可靠,灵活; 易安装和操作
        *和现有系统对接时,改动很少
        *撬装结构使安装和操作变得简 单
        *不需化学品,不含运动部件
        *公用消耗最少: 低压蒸汽,仪表 风,仪表用电, N2用量都很小

    Problem
    Syngas Ratio Adjustment Syngas (H2 + CO) is required to make a variety of products. Each of these syngas derivatives has a specific ratio of H2 to CO in the feed syngas that is optimal for its production. However, the H2:CO ratio produced is a function of the syngas process and the hydrocarbon feed. This ratio will not necessarily be optimal for downstream products. Therefore, some method for reducing the amount of hydrogen in the syngas is needed.

    VaporSep-H2™ Solution

    VaporSep-H2™offers a simple method for separating H2 from syngas to adjust  the H2:CO ratio. In a typical system, the feed gas is first cooled to remove condensable hydrocarbons, and then heated before entering the membrane. Hydrogen preferentially permeates through the membrane, producing a purified hydrogen “permeate” stream and a hydrogen-depleted “ratio-adjusted syngas” stream. This ratio adjustment can even produce high-purity CO for processes requiring it as a feed.

    Benefits

    ■  Efficient syngas and hydrogen recovery: membrane systems typically recover 90% to 98% of feed CO and produce a hydrogen product at  85 to 95 vol% purity.

    ■  Proven performance:  many references for H2/CO adjustment, including pressures as high as 130 bar and operating lifetimes of more  than 10 years.

    ■  Long membrane life

    ■  Simple, reliable, and flexible unit; easy to install and operate: 

    * Integrates into existing operations with minimal modification

    * Simple installation and operation with compact skid-mounted construction

    * Requires no chemicals, contains no moving parts

    * Minimal utility usage: low pressure steam, instrument air, instrument power, N2