基于生命周期的工业副产石膏制备胶凝材料碳足迹评价

摘要/Abstract

摘要： 在“两山”理论、“双碳”目标的新形势下,我国发布了一系列政策及优惠条件鼓励以工业副产石膏为原料制备石膏胶凝材料,包括建筑石膏、α型高强石膏、混合相石膏等。迄今为止,国内鲜有关于石膏胶凝材料的碳足迹核算报告。本文基于生命周期评价方法,针对工业副产石膏制备石膏胶凝材料建立碳足迹核算模型,并以磷石膏制备α型高强石膏为例进行验证。结果表明,α型高强石膏产品原料获取、生产、运输三个阶段的碳足迹分别为3.95、288.04、14.31 kg CO₂ eq/t,总量为306.3 kg CO₂ eq/t,其中生产阶段碳排放量最大,是降低能耗、减少碳排放、节约成本的重要环节。本文建立的碳足迹核算模型适用于建筑石膏、α型高强石膏、无水石膏、混合相石膏等产品碳足迹核算。

关键词: 工业副产石膏, 石膏胶凝材料, α型高强石膏, 生命周期评价, 碳足迹

Abstract: Under the new situation of “Two Mountains” theory and “Dual Carbon” goals, our country has issued a series of policies and preferential conditions to encourage the preparation of gypsum cementitious materials from industrial by-product gypsum, including calcined gypsum, α high-strength gypsum, mixed phase gypsum, et al. So far, there are few carbon footprint calculation reports on gypsum cementitious materials in China. In this paper, the carbon footprint calculation model of gypsum cementitious materials prepared from industrial by-product gypsum was established based on life cycle assessment method, which was demonstrated through the production of α high-strength gypsum from phosphogypsum. The results show that the carbon footprint in three stages of raw material acquisition, production and transportation of α high-strength gypsum product is 3.95, 288.04 and 14.31 kg CO₂ eq/t, respectively, and the total emission is 306.3 kg CO₂ eq/t. The carbon emission in production stage is the largest, which is an important segment to reduce energy consumption, reduce carbon emission and save costs. The carbon footprint calculation model established in this paper is applicable to the carbon footprint calculation for calcined gypsum, α high-strength gypsum, anhydrite, mixed phase gypsum, et al.

Key words: industrial by-product gypsum, gypsum cementitious material, α high-strength gypsum, life cycle assessment, carbon footprint

中图分类号:

TQ177.3

李莹, 段鹏选, 倪文, 张大江. 基于生命周期的工业副产石膏制备胶凝材料碳足迹评价[J]. 硅酸盐通报, 2023, 42(6): 1921-1930.

LI Ying, DUAN Pengxuan, NI Wen, ZHANG Dajiang. Carbon Footprint Assessment of Cementitious Materials Prepared from Industrial By-Product Gypsum Based on Life Cycle[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(6): 1921-1930.

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