富碳天然气甲烷及二氧化碳联合转化的研究

南海富碳天然气中含有较高浓度的二氧化碳，导致二氧化碳排放高且热值低，使得南海富碳天然气难以有效利用。.本项目针对南海富碳天然气CO2含量高的特点，通过与甲醇烷基化反应耦合解决甲烷无氧芳构化反应稳定运行问题，将甲烷直接高效转化为芳烃和氢气。并利用所产氢气，采用在微生物反应体系中添加固体催化剂大幅度提高微生物法转化效率，在常温常压下将富碳天然气中含有的CO2转化为乙酸、丁酸、己酸等化学品，实现甲烷及CO2联合直接转化制C2+化学品。同时，揭示稳定反应状态下的催化剂活性相的动态变化机理，深入研究活性相的表界面特性并解析其原子局域结构，并明确碳氢键活化及碳碳键生成机理，实现具有高效稳定活性相的催化剂的可控制备。同时明确微生物法CO2转化机制及调控规律，从本质上揭示催化剂添加对微生物转化CO2制备有机酸的促进机理与调控机制。为南海富碳天然气系统利用的实施提供依据。

The CO2-rich natural gas in the South China Sea contains high concentration of carbon dioxide, which leads to high emission of carbon dioxide and low calorific value, leading to difficult using this kind of natural gas effectively..Aiming at the high CO2 content of natural gas in the South China Sea, this project achieves excellent stability of methane dehydroaromatization (MDA) reaction by coupling with methanol alkylation reaction, and converts methane directly and efficiently into aromatics and hydrogen. In addition, Using the formed hydrogen by direct conversion of methane, the CO2, contained in nature gas, will be converted to C2+ chemicals such as acetate and butyric acid by catalyst promoted microorganism method under ambient temperature and pressure, to realize green reduction of CO2. Meanwhile, in order to realizing the controllable preparation of the catalyst with highly stable active phase, this project will reveal the dynamic change mechanism of the active phase of the catalyst under the stable state, and investigate the surface interface characteristics and the atomic local structure of the active phase. Furthermore, the mechanism of C-H bond activation and C-C bond formation will be clarified, At the same time, this project will also discover the mechanism of CO2 conversion to organic acids via catalyst addition microbial system. .This project would provide system solution for utilization of CO2 rich nature gas in the South China Sea.