HollySys Supports Successful Commissioning of World's Largest Integrated Green Hydrogen-Ammonia-Methanol Project

Recently, Hollysys supported the successful commissioning of Phase I of the China Energy Engineering Corporation (CEEC) Songyuan Hydrogen Energy Industrial Park Green Hydrogen-Ammonia-Methanol Integration Project.

Project Background

As the world's largest integrated green hydrogen-ammonia-methanol facility, the project is designed for an output of 45 KTA of green hydrogen and 200 KTA of green ammonia/methanol. It is equipped with 15 ground-mounted hydrogen storage tanks with a capacity of 2,000 m³ each, the largest single-unit storage capacity globally, and a hydrogen production array comprising 64 electrolyzers. The project has set four world records: the largest overall scale, the largest hydrogen storage capacity, the widest flexible operating load range, and the largest deployment of alkaline water electrolysis equipment.

It has obtained ISCC EU certification by applying a flexible ammonia synthesis technology capable of operating from 30% to 110% load, which effectively addresses the long-standing challenge of coupling volatile renewable energy with stable chemical production. The project has also completed the world's first overseas shipment of green ammonia for maritime transport, marking the transition of the green hydrogen sector from pilot exploration to large-scale commercial application.

Project Challenges

The project faced significant technical challenges arising from the inherent intermittency of wind and solar power and the strong coupling between hydrogen and ammonia production units. Traditional control strategies proved inadequate for coordinating multiple process units and maintaining plant-wide material and energy balance. The volatility of renewable power generation has long conflicted with the stringent stability requirements of water electrolysis, directly impacting hydrogen quality and downstream production reliability. Moreover, due to limited technological maturity, there had been no proven commercial-scale reference projects for integrated wind–solar–hydrogen–ammonia–methanol systems in China.

HollySys' Solution

Drawing on extensive cross-industry experience in intelligent solutions for the process industries, HollySys developed an innovative Wind-Solar-Storage-Hydrogen-Ammonia-Methanol Industrial Intelligent Agent tailored to the project’s specific needs. The solution integrates core control systems including Distributed Control System (DCS), Safety Instrumented System (SIS), and Gas Detection System (GDS), with digital twin technology and an intelligent optimization and control platform. It spans the entire process chain, from renewable power generation, electrochemical energy storage, and power transmission, to water electrolysis hydrogen production, hydrogen storage, air separation, and ammonia/methanol synthesis. At the heart of the solution is an Intelligent Control Brain, which delivers integrated capabilities of self-perception, self-diagnosis, self-decision-making, and self-execution, ensuring stable and efficient operation of the mega-facility even under extreme fluctuations in renewable energy input. Through this comprehensive architecture, the system achieves real-time, all-scenario dynamic balance of materials and energy across the entire plant, becoming a critical enabler in overcoming the deep coupling challenges between energy systems and chemical processes.

As hydrogen-based energy industries continue to gain momentum, HollySys has addressed the fundamental challenge between renewable energy volatility and chemical production stability. By pioneering large-scale autonomous operation of a green “Power–Hydrogen–Ammonia–Methanol” value chain, HollySys helps propel the green energy industry from automation toward intelligence, and contributs to the global pathway toward sustainable energy transformation.