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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">probener</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. ПРОБЛЕМЫ ЭНЕРГЕТИКИ</journal-title><trans-title-group xml:lang="en"><trans-title>Power engineering: research, equipment, technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-9903</issn><issn pub-type="epub">2658-5456</issn><publisher><publisher-name>Kazan State Power Engineering  University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30724/1998-9903-2024-26-2-3-14</article-id><article-id custom-type="elpub" pub-id-type="custom">probener-3018</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ЭКОЛОГИЧЕСКАЯ БЕЗОПАСНОСТЬ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ECOLOGICAL SAFETY</subject></subj-group></article-categories><title-group><article-title>Снижение содержания диоксида углерода в выбросах при использовании метано-водородного топлива</article-title><trans-title-group xml:lang="en"><trans-title>Reducing carbon dioxide emissions when using methane-hydrogen fuel</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3658-7830</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Демин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Demin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Демин Алексей Владимирович – докт. техн. наук, профессор кафедры «Инженерная экология и безопасность труда»</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Alexey V. Demin</p><p>Kazan</p></bio><email xlink:type="simple">alexei_demin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Павлов</surname><given-names>Г. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Pavlov</surname><given-names>G. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Павлов Григорий Иванович – докт. техн. наук, профессор, заведующий кафедрой «Специальные технологии в образовании» КНИТУ-КАИ</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Grigory I. Pavlov</p><p>Kazan</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Накоряков</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nakoryakov</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Накоряков Павел Викторович – канд. техн. наук, доцент кафедры «Специальные технологии в образовании» КНИТУ-КАИ</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Pavel V. Nakoryakov</p><p>Kazan</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зайнутдинова</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zainutdinova</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зайнутдинова Динара Айдаровна – аспирант КНИТУ-КАИ</p><p>г. Казань</p></bio><bio xml:lang="en"><p>Dinara A. Zainutdinova</p><p>Kazan</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский государственный энергетический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Power Engineering University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Казанский национальный исследовательский технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan National Research Technical University named after A. N. Tupolev – KAI</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>03</day><month>06</month><year>2024</year></pub-date><volume>26</volume><issue>2</issue><fpage>3</fpage><lpage>14</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Демин А.В., Павлов Г.И., Накоряков П.В., Зайнутдинова Д.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Демин А.В., Павлов Г.И., Накоряков П.В., Зайнутдинова Д.А.</copyright-holder><copyright-holder xml:lang="en">Demin A.V., Pavlov G.I., Nakoryakov P.V., Zainutdinova D.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.energyret.ru/jour/article/view/3018">https://www.energyret.ru/jour/article/view/3018</self-uri><abstract><p>ЦЕЛЬ. Определение оптимальных режимов декарбонизации метана, а также оценка выбросов CO2 при последующем сжигании пиролизного газа, в том числе и совместно с природным газом в различных соотношениях.МЕТОДЫ. Рассматривались процессы термохимической конверсии метана в водород и конденсированный углерод в реакторе с внешним нагревом стенок. Тепловая энергия, необходимая для пиролиза газа, получается за счет сжигания смеси воздуха и части пиролизного газа, очищенного от частиц твердого углерода. При выполнении численных исследований процессов пиролиза была использована кинетическая модель одномерного течения реагирующей смеси при внешнем подводе тепловой энергии через стенки осесимметричного канала (трубчатый реактор).РЕЗУЛЬТАТЫ. Разработан механизм химического взаимодействия при термическом разложении метана, с учетом образования конденсированного углерода, в температурном диапазоне от 1000 до 1200 °С. Определены основные энергетические показатели и состав пиролизного газа при различных значениях температуры пиролиза и степени конверсии углерода.ЗАКЛЮЧЕНИЕ. Проведены оценки выбросов CO2 при сжигании пиролизного газа, в том числе совместно с природным газом. При разработке технологий пиролиза, и их применении в промышленных масштабах целесообразно использовать часть получаемого пиролизного газа с высоким содержанием водорода для обеспечения тепловой энергией процессов термического разложения исходного сырья. По результатам расчетов доля этой части достигает ≈ 35 % от общего количества пиролизного газа. Такой подход, в отличие от сжигания для этой цели природного газа, существенно снизит выбросы CO2. Сжигание получаемого пиролизного газа, даже без удаления остаточных углеводородов, характеризуется вполне приемлемыми в настоящее время коэффициентами выбросов CO2 ≈ 7-25 т CO2/ТДж.</p></abstract><trans-abstract xml:lang="en"><p>AIM. To determine optimal modes for methane decarbonization, as well as to assess CO2 emissions during subsequent combustion of the pyrolysis gas, including together with the natural gas in various ratios.METHODS. The processes of thermochemical conversion of methane into hydrogen and condensed carbon in a reactor with external heating of the walls were considered. The thermal energy required for gas pyrolysis is obtained by burning a mixture of air and part of the pyrolysis gas, which is free from solid carbon particles. When performing numerical studies of pyrolysis processes, a kinetic model of one-dimensional flow of the reacting mixture was used with an external supply of thermal energy through the walls of an axisymmetric channel (tubular reactor).RESULTS. The mechanism of chemical interaction during the thermal decomposition of methane was developed, taking into account the formation of condensed carbon in the temperature range from 1000 to 1200 °C. The main energy indicators and the composition of pyrolysis gas were determined at various values of the pyrolysis temperature and the degree of carbon conversion.CONCLUSION. Carbon dioxide emissions from the combustion of pyrolysis gas, including together with the natural gas, were assessed. When developing pyrolysis technologies and applying them on an industrial scale, it is advisable to use part of the resulting pyrolysis gas with a high hydrogen content to provide thermal energy for the processes of thermal decomposition of the feedstock. According to the calculations, the share of this part reaches ≈ 35% of the total amount of pyrolysis gas. This approach, as opposed to burning the natural gas for this purpose, significantly reduces CO2 emissions. The combustion of the resulting pyrolysis gas, even without removing residual hydrocarbons, is characterized by currently quite acceptable CO2 emission factors of ≈ 7-25 t CO2/TJ.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>природный газ</kwd><kwd>пиролиз</kwd><kwd>горение</kwd><kwd>выбросы парниковых газов</kwd><kwd>моделирование</kwd><kwd>численные исследования</kwd></kwd-group><kwd-group xml:lang="en"><kwd>natural gas</kwd><kwd>pyrolysis</kwd><kwd>combustion</kwd><kwd>greenhouse gas emissions</kwd><kwd>modeling</kwd><kwd>numerical research</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Weger L., Abánades A., Butler T. Methane cracking as a bridge technology to the hydrogen economy // International Journal of Hydrogen Energy. 2017. 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