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Guangxi Liuzhou Chemical Industry Co., Ltd. has successfully developed a groundbreaking "low-water/gas-to-sulfur conversion process for pulverized coal gasification," offering a new pathway for efficient production and energy-saving emission reduction in synthetic ammonia manufacturing. As of the press release date, this innovative technology has been implemented in the production of 300,000 tons/year of synthetic ammonia at the Liuhua pulverized coal gasification plant. The system is operating smoothly, with all equipment performance indicators within optimal ranges, and the quality of the ammonia produced remains consistently stable.
On the 12th, an expert panel from the China Petroleum and Chemical Industry Association conducted an evaluation of the new process and officially approved it. The experts recommended accelerating the industrial promotion of this technology and encouraging broader application of the coal gasification equipment. Their endorsement highlights the potential of this innovation to transform the industry.
The successful development of this process addresses long-standing challenges such as high carbon monoxide (CO) concentration and the risk of methanation side reactions when feedstock changes. It significantly reduces exhaust emissions, marking a major technological breakthrough. This advancement opens new possibilities for smoother operations, energy efficiency, and environmental protection in synthetic ammonia production via pulverized coal gasification.
The process leverages the low water content of the raw gas in the Shell waste-heat recovery gasification process. It employs an independently developed QDB-04 catalyst to precisely control the shift reaction in the first reactor by adjusting the water/gas ratio in the process gas. This allows for efficient conversion of high CO feed gas under low water/gas ratio conditions without triggering methanation side reactions, making the process both innovative and environmentally friendly.
After over a year of industrial application, monitoring data shows that the first-stage water/gas ratio remains below 0.3, while the maximum water/gas ratio across all stages does not exceed 0.5. The hot spot temperature stays under 400°C, ensuring mild operating conditions. The system runs smoothly, with no methanation side reactions occurring. This leads to significant reductions in steam consumption and lower equipment investment costs, resulting in substantial economic and social benefits. Overall, the technology is recognized as being at an international advanced level.
October 12, 2025