SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2016, Vol. 24 ›› Issue (11): 1541-1551.DOI: 10.1016/j.cjche.2016.04.001

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An efficient methodology for utilization of K-feldspar and phosphogypsum with reduced energy consumption and CO2 emissions

Zhixi Gan1, Zheng Cui1, Hairong Yue1, Siyang Tang1, Changjun Liu1, Chun Li1, Bin Liang1, Heping Xie2   

  1. 1 Multi-phases Mass Transfer and Reaction Engineering Laboratory, College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2 Center of CCUS and CO2 Mineralization and Utilization, Sichuan University, Chengdu 610065, China
  • Received:2016-02-05 Revised:2016-04-03 Online:2016-12-06 Published:2016-11-28
  • Contact: Hairong Yue
  • Supported by:

    Supported by the National Natural Science Foundation of China (21336004) and the State Key Research Plan of the Ministry of Science and Technology (2013BAC12B03).

An efficient methodology for utilization of K-feldspar and phosphogypsum with reduced energy consumption and CO2 emissions

Zhixi Gan1, Zheng Cui1, Hairong Yue1, Siyang Tang1, Changjun Liu1, Chun Li1, Bin Liang1, Heping Xie2   

  1. 1 Multi-phases Mass Transfer and Reaction Engineering Laboratory, College of Chemical Engineering, Sichuan University, Chengdu 610065, China;
    2 Center of CCUS and CO2 Mineralization and Utilization, Sichuan University, Chengdu 610065, China
  • 通讯作者: Hairong Yue
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21336004) and the State Key Research Plan of the Ministry of Science and Technology (2013BAC12B03).

Abstract: The issues of reducing CO2 emissions, sustainably utilizing naturalmineral resources, and dealing with industrial waste offer challenges for sustainable development in energy and the environment. We propose an efficient methodology via the co-reaction of K-feldspar and phosphogypsum for the extraction of soluble potassium salts and recovery of SO2 with reduced CO2 emission and energy consumption. The results of characterization and reactivity evaluation indicated that the partial melting of K-feldspar and phosphogypsum in the hightemperature co-reaction significantly facilitated the reduction of phosphogypsum to SO2 and the exchange of K+ (K-feldspar) with Ca2+ (CaSO4 in phosphogypsum). The reaction parameters were systematically investigated with the highest sulfur recovery ratio of ~60% and K extraction ratio of ~87.7%. This novel methodology possesses an energy consumption reduction of ~28% and CO2 emission reduction of ~55% comparing with the present typical commercial technologies for utilization of K-feldspar and the treatment of phosphogypsum.

Key words: Waste treatment, Reactivity, Mineralization, K-feldspar, CO2 emission reduction

摘要: The issues of reducing CO2 emissions, sustainably utilizing naturalmineral resources, and dealing with industrial waste offer challenges for sustainable development in energy and the environment. We propose an efficient methodology via the co-reaction of K-feldspar and phosphogypsum for the extraction of soluble potassium salts and recovery of SO2 with reduced CO2 emission and energy consumption. The results of characterization and reactivity evaluation indicated that the partial melting of K-feldspar and phosphogypsum in the hightemperature co-reaction significantly facilitated the reduction of phosphogypsum to SO2 and the exchange of K+ (K-feldspar) with Ca2+ (CaSO4 in phosphogypsum). The reaction parameters were systematically investigated with the highest sulfur recovery ratio of ~60% and K extraction ratio of ~87.7%. This novel methodology possesses an energy consumption reduction of ~28% and CO2 emission reduction of ~55% comparing with the present typical commercial technologies for utilization of K-feldspar and the treatment of phosphogypsum.

关键词: Waste treatment, Reactivity, Mineralization, K-feldspar, CO2 emission reduction