The coal-to-olefins upgrading demonstration project of Sinopec Great Wall Energy Chemical (Inner Mongolia) Co., Ltd., with a total investment of around 22.1 billion yuan, has been approved for implementation
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Recently, the Ministry of Ecology and Environment issued a public announcement regarding the status of acceptance of environmental impact assessment documents for construction projects from December 26, 2025, to December 31, 2025. The projects under consideration include the coal-to-olefins upgrading demonstration project of Sinopec Great Wall Energy Chemical (Inner Mongolia) Co., Ltd. Sinopec Great Wall Energy Chemical Co., Ltd. (hereinafter referred to as Great Wall Energy Chemical) is a wholly-owned subsidiary of Sinopec Corporation (hereinafter referred to as Sinopec). It was officially established on September 28, 2012. As a specialized company in the field of coal chemical industry, it was set up by Sinopec to implement its development strategy for this sector and to accelerate the growth of its coal chemical business; it serves as a platform for Sinopec’s investments in the coal chemical industry. The total investment in the project is approximately 22.1 billion yuan. The project plans to build a coal-to-methanol plant with an annual capacity of 2.26 million tons (including units for gasification, purification, methanol synthesis, and sulfur recovery), an MTO plant with an annual capacity of 2.26 million tons (including OCC), as well as polyolefin plants: a polypropylene plant with an annual capacity of 250,000 tons (loop-type), a polypropylene plant with an annual capacity of 200,000 tons (gas-phase), a polyethylene plant with an annual capacity of 350,000 tons, and an EVA/LDPE plant with an annual capacity of 100,000 tons. This also includes the air separation units and IGCC power plants that support the process equipment, as well as other supporting utility systems and auxiliary production facilities. The key processes of this project employ advanced and mature technological methods, along with extensive experience in operation and management. The gasification unit employs the SE coal semi-waste boiler gasification technology developed through a collaboration between Sinopec and East China University of Science and Technology ； Acid gas removal uses Sinopec’s own CO. Full recovery acidic gas removal technology ； Olefin catalytic cracking utilizes second-generation OCC technology to further increase the total yield of dienes (ethylene and propylene in the crude propylene product >65% wt) ； The OCC process is deeply integrated with MTO technology; by utilizing the light hydrocarbon recovery section of MTO, it is possible to increase the production of ethylene and propylene further, thereby reducing the energy consumption of the facility. Optimal coupling of new coal chemical industry and new energy. In the coal chemical sector, the rooftops of the dipolymer packaging plants and the flare stack area utilize photovoltaic power generation, which is connected to the medium and low voltage distribution networks for self-use. This project aims to combine separately operated photovoltaic and wind power systems for hydrogen production via electrolysis, or purchased green electricity, in order to produce high-quality green chemical materials. The hydrogen produced by electrolyzing water is used in the methanol synthesis units of the Da Lu coal-to-olefins project; it supplies green hydrogen and green electricity to these coal chemical plants, reducing their coal and energy consumption, and thereby lowering the overall carbon dioxide emissions of the facility.
Project optimization adjustments: 1) Further optimize the project’s energy consumption levels, resulting in a significant reduction in both energy and water usage. The comprehensive energy consumption estimated by the original environmental impact assessment for this project was 3.74 tce per ton of polyolefin, with water consumption of 9.47 tons per ton of polyolefin. With the localization of key technologies in this project and the upgrading of critical processes throughout the production process, the comprehensive energy consumption has dropped to 3.29 tce per ton of polyolefin, and water consumption to 8.71 tons per ton of polyolefin – values that are better than those indicated in the original environmental impact assessment, representing a significant reduction in both energy and water usage. 2) Implement the **\"dual carbon\" goals by conducting an overall optimization of the project construction plan. Under the new development circumstances, and in line with **the requirements regarding modern coal chemical processing technologies, the implementation of the \"dual carbon\" goals, and the autonomous region’s efforts to strengthen control over energy consumption, the project plan has been comprehensively optimized and adjusted. After calculation, the CO2 under the base operating conditions for this project is as follows. The total emissions amount to 5.580969 million tons per year, with the carbon emission per unit of product being 6.25 tons of CO2 per ton of olefins produced ； The total CO2 emissions under the scenario of coupling green hydrogen amount to 5.05598 million tons per year. With the integration of green electricity and green hydrogen, the carbon emission per unit of product is 5.66 tons, which reaches the first-class advanced level specified in the \"Carbon Emission Benchmarks for the Modern Coal Chemical Industry\" (T/CCECTA0104-2023)
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