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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >SO_2 - an indirect source of energy
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SO_2 - an indirect source of energy

机译：SO_2-间接能源

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Global sulphur dioxide (SO_2) emissions peaked around the mid-1970s, after which they declined. However, with the growth of specifically China, emissions are on the rise again. In 2008, global anthropogenic SO_2 emissions totalled 127 Mt, with energy production accounting for 63.2 Mt and metal-related processes 12.8 Mt. As a well-known gaseous pollutant, SO_2 is not perse known as a source of energy. However, in the presence of water SO_2 can be electro-oxidized at the anode of an electrolyser to produce hydrogen ions, which in turn can be reduced at the cathode of the electrolyser to produce hydrogen gas. Gaseous emissions of SO_2 can therefore be cleaned up with the simultaneous production of hydrogen, an energy store or carrier, which provides an economic offset to the overall cost of this potential remediation process. This process forms part of the Hybrid Sulfur (HyS) cycle as well as the once-through HyS (OTHyS) cycle. Indications are that the greatest stride towards the development of an effective electrolyser for the electro-catalytic oxidation of SO_2 requires the development of an anode electrocatalyst exhibiting enhanced activity for the electro-oxidation of SO_2. A critical review will be presented on the research and development of such an anode electrocatalyst, and a strategy for a more effective research and development effort will be discussed. This will include theoretical studies on the electro-catalytic oxidation of SO_2 on different metal-based catalytic surfaces (for which some preliminary results are presented) in conjunction with combinatorial (simultaneous multi-metal multi-electrode) electrochemistry studies as well as single-electrode electrochemistry studies.
机译：全球二氧化硫（SO_2）排放在1970年代中期达到峰值，之后又下降。但是，随着特别是中国的增长，排放量再次上升。 2008年，全球人为排放的SO_2总量为127 Mt，其中能源生产占63.2 Mt，金属相关过程占12.8Mt。作为一种众所周知的气态污染物，SO_2本身并不是一种能源。然而，在水的存在下，SO 2可以在电解器的阳极被电氧化以产生氢离子，而氢离子又可以在电解器的阴极被还原以产生氢气。因此，可以通过同时生产氢气，储能器或载体来净化SO_2的气体排放，这可以经济地抵消这一潜在修复过程的总成本。此过程构成混合硫（HyS）循环以​​及一次过的HyS（OTHyS）循环的一部分。迹象表明，要想开发出一种有效的用于SO_2电催化氧化的电解槽，要取得最大进展，就需要开发出一种具有增强的SO_2电氧化活性的阳极电催化剂。将对这种阳极电催化剂的研究和开发进行严格的审查，并讨论更有效的研究和开发策略。这将包括有关在不同金属基催化表面上对SO_2进行电催化氧化的理论研究（已给出一些初步结果），以及组合（同时多金属多电极）电化学研究和单电极研究。电化学研究。

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