Carbon dioxide (CO₂) and methane (CH₄) are major greenhouse gases, and the use of these C1 resources to produce high-value chemicals is significant for sustainable chemistry. Due to the high stability and C–C coupling barriers, simultaneous conversion of CO₂ and CH₄ to aromatics remains challenging. Herein, we report a sustainable strategy for utilizing greenhouse gases based on the conversion of CO₂ and CH₃Cl, an alternative of CH₄, that yields a high aromatics selectivity (71.3%) with ∼50% BTX selectivity using H–ZSM–5 as catalyst at 723 K and 3 MPa. In situ characterization and ¹³C isotope-labeling experiments demonstrate that CO₂ directly participates in the formation of aromatics via lactone species instead of undergoing a classical reverse water-gas shift reaction. Furthermore, a unique mechanism for CO₂ conversion is proposed, involving the formation and subsequent transformation of lactone and cyclopentenone species. This work expands high carbon utilization pathways for converting greenhouse gases into chemicals.

二氧化碳(CO ₂ )和甲烷(CH ₄ )是主要的温室气体，利用这些C1资源生产高价值化学品对于可持续化学具有重要意义。由于高稳定性和C-C耦合势垒，同时将CO ₂和CH ₄转化为芳烃仍然具有挑战性。_{在此，我们报告了一种基于 CO 2}和 CH _{3 Cl（CH 4}的替代品）转化的可持续利用温室气体的策略，该策略使用 H-ZSM-5 作为催化剂，在 723 K 和 3 MPa 下产生高芳烃选择性（71.3%）和 ~50% BTX 选择性。原位表征和¹³C同位素标记实验表明CO ₂通过内酯直接参与芳烃的形成，而不是经历经典的逆水煤气变换反应。此外，提出了一种独特的CO _{2转化机制，涉及内酯和环戊烯酮物质的形成和随后的转化。}这项工作扩展了将温室气体转化为化学品的高碳利用途径。