Life-cycle greenhouse gas emissions and cost of potassium extraction and CO<sub>2</sub> mineralization via K-feldspar—industrial solid waste calcination

MO Chun; LIAO Wenjie; LIANG Bin; LI Chun; YUE Hairong; XIE Heping

doi:10.11949/j.issn.0438-1157.20161754

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Life-cycle greenhouse gas emissions and cost of potassium extraction and CO₂ mineralization via K-feldspar—industrial solid waste calcination

更新时间：2025-12-10

- Life-cycle greenhouse gas emissions and cost of potassium extraction and CO₂ mineralization via K-feldspar—industrial solid waste calcination
- CIESC Journal Issue 6, Pages: 2501-2509(2017)
- 作者机构：
  
  1. 四川大学化学工程学院,四川,成都,610065
  2. 四川大学新能源与低碳技术研究院,四川,成都,610065
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161754
  CLC： Q044.3
- Online First：05 June 2017，
  
  Published：05 June 2017
- 稿件说明：
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MO Chun, LIAO Wenjie, LIANG Bin, et al. Life-cycle greenhouse gas emissions and cost of potassium extraction and CO₂ mineralization via K-feldspar—industrial solid waste calcination[J]. CIESC Journal, 2017, (6): 2501-2509. DOI: 10.11949/j.issn.0438-1157.20161754.
DOI：

MO Chun, LIAO Wenjie, LIANG Bin, et al. Life-cycle greenhouse gas emissions and cost of potassium extraction and CO₂ mineralization via K-feldspar—industrial solid waste calcination[J]. CIESC Journal, 2017, (6): 2501-2509. DOI: 10.11949/j.issn.0438-1157.20161754. DOI：

摘要

利用工业固废活化非水溶性钾长石矿，矿化固定二氧化碳（CO2）并提钾工艺，是同时处理工业固废、开发钾资源、减排CO2等一举多得的CCUS路线。采用生命周期评价（LCA）方法，以生产含1 t K2O的钾肥为功能单元，以传统的高炉冶炼钾长石制可溶性钾肥并联产白水泥工艺作为参照，对比评价了两种钾长石-工业固废体系矿化CO2联产钾肥工艺过程的碳减排潜力和经济性。对工艺从原料开采、运输到产品生产的生命周期的温室气体排放量（简称“碳排放”）和成本进行了全流程的核算，研究了更全面的产品碳排放和成本分配方法。结果表明，无论是碳排放还是经济性，钾长石-工业固废体系矿化CO2联产钾肥工艺均较传统工艺有很大提高，碳减排潜力分别可达81.16%和20.48%左右，成本可节约34.75%和45.11%左右。

Abstract

Using industrial solid waste to calcinate non-water-soluble natural K-feldspar for CO2 mineralization and potassium extraction is a multi-functional CO2 capture

utilization and storage (CCUS) technology that can treat industrial solid waste

utilize potassium resource and reduce greenhouse-gas (GHG) emissions. Life cycle assessment (LCA) was adopted based on a functional unit of the produced potash fertilizer containing 1 ton of K2O to compare two emerging technologies of simultaneous potash fertilizer production and CO2 mineralization from K-feldspar and industrial solid waste (CaCl2/phosphor-gypsum) with a traditional technology of potash fertilizer and white cement coproduction by smelting K-feldspar in blast furnace in terms of GHG-reduction potential and economic feasibility. The life-cycle (from raw material exploitation to transportation to production) GHG emissions and life-cycle cost of these technologies were accounted by using an improved allocation approach that considered the credit of avoided GHG emissions/cost from industrial solid waste treatment. The results showed that the two emerging technologies were preferred to the traditional technology in terms of both life-cycle GHG emissions and economic feasibility with GHG-reduction potential of about 81.16% and 20.48%

and cost savings of up to 34.75% and 45.11%

respectively.

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Life-cycle greenhouse gas emissions and cost of potassium extraction and CO2 mineralization via K-feldspar—industrial solid waste calcination

DOI：10.11949/j.issn.0438-1157.20161754

摘要

Abstract

关键词

Keywords

references

Life-cycle greenhouse gas emissions and cost of potassium extraction and CO₂ mineralization via K-feldspar—industrial solid waste calcination