Adsorption and catalytic removal of hydrogen sulfide on active carbon (char) at low temperature
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摘要: 以活性炭、活性焦作为脱硫剂，并应用BET、XPS等测试手段对其进行分析表征。结果表明，活性炭（焦）的脱硫能力与其表面酸碱性有着密切的关系，增加表面上起碱性作用的π—π﹡键，羰基官能团（C—O和醚基官能团（C—O）的浓度，可增加其表面催化作用，特别是C—O官能团；反应温度对活性炭（焦）的脱硫性能有很大的影响，脱硫剂在150℃～180℃活性高，硫容大，副反应少；水蒸气对活性炭（焦）脱除H2S有促进作用。Abstract: The active carbon and active char were used as the desulfurizer and BET, XPS techniques were used to analyze and characterize the physical and chemical properties of the sorbent. The results show that the desulfurization ability of the active carbon (char) has a close relation with its surface chemical functional groups，especially with C—O group. The reaction temperature has a great impact on the desulfurization performance of the active carbon (char). The desulfurizer shows a high reactivity, high sulfur capacity and fewer side reactions at 150℃～180℃. Meanwhile, the steam can promote the removal of hydrogen sulfide.
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Key words:
- active carbon (char) /
- adsorption /
- catalytic removal /
- low temperature desulfurization
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