Department of Agricultural Machinery and Mechanization Engineering, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran.
PLoS One. 2024 Nov 7;19(11):e0313129. doi: 10.1371/journal.pone.0313129. eCollection 2024.
The goal of this research was to analyze the energy and environmental impact of KCL and K2SO4 production and provide recommendations for enhancing energy efficiency and environmental practices. Data was collected through face-to-face interviews at two potash plants and the CML methodology was employed to assess impact categories. Inventory data for production inputs were sourced from the Ecoinvent, BUWAL 250, and LCA Food DK databases within the Simapro 8.03.14 software. The results showed that the production of one ton of K2O as KCL and K2SO4, required 7080.82 and 15691.5 MJ, respectively. Electricity accounted for 52.96% of energy input in KCL production, whereas fuel oil constituted 38.39% in K2SO4 production. Energy ratios, energy productivity and specific energy for K2SO4 was 0.40, 0.06 kgMJ-1, and 15.6 MJkg-1, while corresponding indices for KCL were 0.90, 0.14 kgMJ-1 and 7.08 MJkg-1, respectively. In KCL production, electricity had eight impact categories, while the use of KCL as a raw material in K2SO4 production had significant effects on seven impact categories. Considering the vast and unoccupied space available in Iran's great desert, where the KCL plant is situated, the installation of a photovoltaic power station near the plant could greatly enhance energy efficiency and reduce emissions.
本研究旨在分析 KCL 和 K2SO4 生产的能源和环境影响，并提出提高能源效率和环境实践的建议。通过在两家钾肥厂进行的面对面访谈收集了数据，并采用 CML 方法评估了影响类别。生产投入的清单数据来自 Simapro 8.03.14 软件中的 Ecoinvent、BUWAL 250 和 LCA Food DK 数据库。结果表明，生产一吨 K2O 作为 KCL 和 K2SO4，分别需要 7080.82 和 15691.5 MJ。电力在 KCL 生产中占能源投入的 52.96%，而燃料油在 K2SO4 生产中占 38.39%。K2SO4 的能源比、能源生产力和比能分别为 0.40、0.06 kgMJ-1 和 15.6 MJkg-1，而 KCL 的相应指标分别为 0.90、0.14 kgMJ-1 和 7.08 MJkg-1。在 KCL 生产中，电力有八个影响类别，而 KCL 作为 K2SO4 生产的原材料的使用对七个影响类别有重大影响。考虑到 KCL 工厂所在的伊朗大沙漠有广阔而未开发的空间，可以在工厂附近安装一个光伏电站，以大大提高能源效率并减少排放。
