Current status and challenges in technology development for methanol pipeline transmission

<b>[Objective]</b> Methanol, a renewable and green fuel, holds significant potential for broad applications. However, its long-distance pipeline transmission technology remains underutilized in practical scenarios. <b>[Methods]</b> This study investigated the feasibility and existing challenges of long-distance methanol pipeline transmission technology. Through a comprehensive examination of cases involving methanol transmission pipelines in China and abroad, this research reviewed process and equipment requirements, while analyzing potential safety risks during transmission. The study also assessed the current development status of industrial standards and specifications in this field and highlighted the challenges hindering the widespread adoption of this technology. Additionally, future development trends were anticipated based on the study results. <b>[Results]</b> This study not only highlighted the promising application prospects of methanol as a green fuel in long-distance pipeline transmission but also unveiled the challenges faced in its implementation. Specific focus was given to system design requirements to accommodate the unique physical and chemical characteristics of methanol, such as flow rate control and equipment selection. Safety risks, including corrosion, swelling, leakage, and explosion, were also emphasized. Moreover, the study stressed the need for overall improvement in technology standards and specifications due to the limited number of practical methanol transmission cases. <b>[Conclusion]</b> To achieve the commercialization and large-scale implementation of methanol pipeline transmission technology, it is essential to tackle technical and safety challenges systematically. Key considerations include enhancing methanol purity, optimizing the transmission process,and selecting suitable corrosion-resistant and swelling-resistant materials.Besides,it is also imperative to establish comprehensive safety standards and emergency response strategies.This study recommends strengthening fundamental scientific research,fostering technological innovation,and establishing robust management systems and policy frameworks to ensure safe operations,economic benefits,and environmental sustainability in methanol transportation technology applications.