Pilot production of China’s first 10,000-ton-scale project for producing carbon-negative building materials from CO2 mineralization using solid waste was a success

Thread Content

Pilot production successful for China’s first 10,000-ton-per-year project to produce carbon-negative building materials using mineralized CO2 from coal chemical industry waste. Author/Source: Coal Chemical Industry Journal. Date: April 6, 2022. Clicks: 86. Not long ago, the new building materials company affiliated with Zhongyan Anhui Hongsi Fang Co., Ltd., after extensive preparation and planning, collaborated with the Institute of Organic Functional Materials and Applied Technologies at the Yangtze River Delta **Technology Innovation Center, Tongji University, and Jiangsu Tongcui High-Tech Co., Ltd. to carry out the pilot operation of China’s first 10,000-ton-per-year project to produce carbon-negative building materials using mineralized CO2 derived from waste in the coal chemical industry. The pilot production results show that the technology for preparing fully solid-waste negative-carbon building materials through CO₂ mineralization combines advancement with engineering feasibility. Mineralized building materials are produced without the use of external heat sources or any cement, with strengths that meet current ** and industry standards. These materials also enable the effective sequestration of CO₂, achieving an average carbon fixation rate of over 15%, thus providing industrial proof of a solution that combines energy savings, waste utilization, and carbon reduction. The exploratory trials conducted this time have identified effective ways for the low-cost fixation of CO₂ in flue gases from coal chemical industries, achieving the optimal solution to the equation \"x waste materials + y carbon dioxide = negative-carbon building materials\". This has filled a gap in both international and domestic industry practices, setting a new precedent in this field. Building on the successful trial operation, the new building materials company is also actively planning the construction of technical renovation projects for carbon dioxide pipelines, in order to prepare for the production and operation of the entire CO2 capture and utilization project using solid waste mineralization. Upon completion of the project renovation, it will be able to effectively process nearly 1 million tons of various types of bulk solid waste each year. Simultaneously, it can capture and utilize at least 100,000 tons of CO₂ annually—an amount equivalent to the total CO₂ absorption capacity of 100,000 mu of forest per year. Upon completion, the project will serve as a benchmark demonstration project in the field of coal chemical industry nationwide. It will also pave an effective path for the low-carbon, circular, and green development of China’s coal chemical industry.