alternativeАльтернативная энергетика и экология (ISJAEE)Alternative Energy and Ecology (ISJAEE)1608-8298Международный издательский дом научной периодики "Спейс10.15518/isjaee.2019.28-33.049-062alternative-1818Research ArticleВОДОРОДНАЯ ЭКОНОМИКАHYDROGEN ECONOMYПроизводство синтез-газа с помощью твердооксидного совместного электролиза с участием метанаMethane Assisted Solid Oxide Co-Electrolysis Process for Syngas ProductionВангЯ.WangYa.

Хубэй, 430072, Китай

Yao Wang

Wuhan, Hubei, 430072, China

pmewy@whu.edu.cnЛиуТ.LiuT.

Хубэй, 430072, Китай

Сучжоу, Цзянсу, 215123, Китай

Tong Liu

Wuhan, Hubei, 430072, China;Suzhou, Jiangsu 215123, China

ЛейЛ.LeiL.

Колумбия, SC, 29208, США

Libin Lei Department of Mechanical Engineering

Columbia, SC, 29208, USA

liu_tong@whu.edu.cnЧенФ.ChenF.

Фанглин Чен д-р наук, профессор кафедры машиностроения

Колумбия, SC, 29208, США

Ph.D., Professor, Department of Mechanical Engineering

Columbia, SC, 29208, USA

chenfa@cec.sc.eduИнститут энергетического машиностроения, Университет УханьКитайSchool of Power and Mechanical Engineering, Wuhan UniversityChinaИнститут энергетического машиностроения, Университет Ухань; Университет УханьКитайSchool of Power and Mechanical Engineering, Wuhan University; Suzhou Institute of Wuhan UniversityChinaУниверситет Южной КаролиныСоединённые Штаты АмерикиUniversity of South CarolinaUnited States201913122019028-334962Copyright © Международный издательский дом научной периодики "Спейс, 20192019Международный издательский дом научной периодики "СпейсМеждународный издательский дом научной периодики "Спейсhttps://www.isjaee.com/jour/about/submissions#copyrightNoticehttps://www.isjaee.com/jour/article/view/1818

В статье рассматривался процесс совместного высокотемпературного электролиза (ВТЭ) пара и CO2 с использованием метана, протекающий на симметричных SFM-SDC/LSGM/SFM-SDC ячейках с выделением высококачественного синтетического газа (синтез-газ – смесь H2 и CO). В режиме электролиза с участием метана был оценен потенциал Нернста для твердооксидных элементов, при этом его значение уменьшалось практически на порядок за счет замены воздуха на метан в анодной атмосфере. При 800 °C напряжение разомкнутой цепи (НРЦ) составило 0,06 В, а при 850 °C и 0,3 В значение плотности тока электролиза было равно 242 мА/см-2 . С помощью модели химического равновесия совместного электролиза и программного обеспечения HSC установлено влияние рабочих условий на химический состав продуктов. Так, обеспечивая соответствующие рабочие условия, на обеих сторонах электрода можно получить высококачественный синтез-газ высокой степени конверсии CO2 в CO и обладающий идеальным молярным соотношением H2/CO на уровне 2. В условиях 850 °C и –120 мА/см-2 отмечено незначительное колебание краткосрочного напряжения элемента ниже 0,05 В, при этом на аноде SFM-SDC вследствие низкого соотношения O2– /CH4 осаждается углерод.

In this study, methane assisted high temperature steam/CO2 co-electrolysis process is performed on symmetrical cells with a configuration of SFM-SDC/LSGM/SFM-SDC to produce high-quality synthesis gas (syngas, a mixture of H2 and CO). The Nernst potential has been evaluated for solid oxide cells in the methane assisted mode, which is reduced by nearly one order of magnitude through substituting the anode atmosphere from air to methane. The open circuit voltage (OCV) is –0.06 V at 800 °C, and an electrolysis current density of –242 mAcm–2 has been obtained at 850 °C and 0.3 V. Effects of operating conditions on products composition have been revealed by using the chemical equilibrium co-electrolysis model and HSC software. High-quality syngas with high conversion rate of CO2 to CO as well as ideal H2/CO molar ratio of 2 could be achieved in both electrode sides by adjusting appropriate operating conditions. The short-term cell voltage is slightly fluctuant less than 0.05 V at 850 °C and –120 mAcm–2 , in which condition carbon deposition has been observed in the SFM-SDC anode due to the low O2– /CH4 ratio.

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The authors declare that there are no conflicts of interest present.