A methane carbon dioxide reforming system and method
CN118062808BActive Publication Date: 2026-08-28WANHUA CHEM GRP CO LTD +1
Patent Information
- Application Number
- CN202211421407.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-11-14
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2042-11-14
AI Technical Summary
Technical Problem
一旦催化剂积碳则管内反应吸热量下降，而管外热辐射恒定，反应管温度将快速升高并烧毁，造成工艺难以进行工业化应用
Benefits of technology
[0016]通过本发明系统，甲烷与二氧化碳混合气进入壳体内部，沿着壳体与反应管之间的空间向上流动，对反应管外表面(例如隔热层外表面)进行冷却，之后混合气进入反应管内部并在高温下发生非催化重整，该非催化重整段内部吸收微波产生热量(由微波发生器提供)以保证适当的温度，通过高温抑制积碳产生并消耗甲烷。混合气再往下经过反应管过渡段降温(利用重整反应的吸热降低气体温度)，再进入反应管中部或中下部发生催化重整反应，该反应所需的热量由催化重整段外部的加热元件提供，利用催化剂提高甲烷转化率，反应完后混合气排至壳体外部。本发明所述方法利用相关反应的热力学特点抑制积碳，原料气中无需通入水蒸气，通过反应管内部非催化重整段、过渡段以及催化重整段的设置可将甲烷及二氧化碳转化为氢碳比<1的合成气，同时，本发明反应中的热量全部由外部提供(微波辐射及加热元件)，本发明壳体仅承受压力，而反应管仅承受高温，进一步地，壳体内部的反应管外部包裹有隔热层，隔热层可减少反应管内热量向壳体内部散失，降低壳体及其内部件的耐热要求；所述壳体温度较低，不存在甲烷在壳体内壁上被金属中的镍催化析碳的问题，且原料气进入可对壳体及反应管外壁进一步冷却。
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Figure HDA0003941293990000011
Abstract
The application discloses a methane carbon dioxide reforming system and method, which comprises a shell, an internal cavity for raw material gas to enter and to bear gas pressure, a reaction tube in the internal cavity of the shell, for the raw material gas to enter and to be discharged to the outside of the shell after sequentially passing through a non-catalytic reforming section in the internal cavity of the reaction tube for absorbing microwave heat, a transition section for gas temperature reduction and a catalytic reforming section for a reforming reaction, a heating element in the internal cavity of the shell, for providing heat to the catalytic reforming section, and a microwave generator in the internal cavity of the shell, for providing microwave heat. The application can convert methane and carbon dioxide into synthesis gas with a hydrogen-carbon ratio of less than 1, all the heat in the reaction is provided from the outside, and the problem of carbon deposition can be avoided.
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Citation Information
Patent Citations
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