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On-line Access: 2017-10-06

Received: 2017-07-10

Revision Accepted: 2017-08-31

Crosschecked: 2017-09-07

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Tao Wang


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Journal of Zhejiang University SCIENCE A 2017 Vol.18 No.10 P.819-830


Integrated direct air capture and CO2 utilization of gas fertilizer based on moisture swing adsorption

Author(s):  Cheng-long Hou, Yu-song Wu, You-zhou Jiao, Jie Huang, Tao Wang, Meng-xiang Fang, Hui Zhou

Affiliation(s):  State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   oatgnaw@zju.edu.cn

Key Words:  Direct air capture, Desorption kinetics, Greenhouse, CO2 fertilizer, Cost analysis

Cheng-long Hou, Yu-song Wu, You-zhou Jiao, Jie Huang, Tao Wang, Meng-xiang Fang, Hui Zhou. Integrated direct air capture and CO2 utilization of gas fertilizer based on moisture swing adsorption[J]. Journal of Zhejiang University Science A, 2017, 18(10): 819-830.

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author="Cheng-long Hou, Yu-song Wu, You-zhou Jiao, Jie Huang, Tao Wang, Meng-xiang Fang, Hui Zhou",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Integrated direct air capture and CO2 utilization of gas fertilizer based on moisture swing adsorption
%A Cheng-long Hou
%A Yu-song Wu
%A You-zhou Jiao
%A Jie Huang
%A Tao Wang
%A Meng-xiang Fang
%A Hui Zhou
%J Journal of Zhejiang University SCIENCE A
%V 18
%N 10
%P 819-830
%@ 1673-565X
%D 2017
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1700351

T1 - Integrated direct air capture and CO2 utilization of gas fertilizer based on moisture swing adsorption
A1 - Cheng-long Hou
A1 - Yu-song Wu
A1 - You-zhou Jiao
A1 - Jie Huang
A1 - Tao Wang
A1 - Meng-xiang Fang
A1 - Hui Zhou
J0 - Journal of Zhejiang University Science A
VL - 18
IS - 10
SP - 819
EP - 830
%@ 1673-565X
Y1 - 2017
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1700351

A new concept of low-cost direct air capture technology integrated with a fertilization system is proposed, as an alternative to the application of air derived CO2. A moisture swing sorbent can elevate the CO2 concentration from 400 parts per million (ppm) to several thousand ppm, and this can be used to cultivate plants. Desorption isotherms were determined and are described well by a Langmuir model. The adsorption rate constant and the desorption rate constant were gained at 25 °C, 35 °C, and 45 °C under 1000 ppm concentration of CO2. In accelerated cultivation experiments, the effects of CO2 concentration, light intensity, and spectrum on the CO2 uptake rate of the plants were investigated. A multi-bed desorption system which is capable of providing a continuous and stable CO2 supply for a greenhouse is demonstrated based on the desorption characteristic and CO2 uptake feature of plants. An energy and cost assessment for the integrated system was performed and the results indicated that minimum energy requirements and cost estimate of CO2 are 35.67 kJ/mol and 34.68 USD/t, respectively. This makes direct air capture a competitive and sustainable carbon source for agriculture.


创新点:1. 基于变湿吸附技术,探究了季铵型聚合物CO2解吸附过程的热力学及动力学特性;2. 获得了CO2作为气肥供给植物增产的关键影响参数; 3. 建立并优化了空气CO2捕集与植物利用的耦合模型。
方法:1. 通过CO2吸附平衡与动力学实验,获得季铵型聚合物CO2解吸附的平衡常数和动力学常数的影响参数;2. 通过植物CO2吸收实验,获得CO2供给植物增产过程中CO2浓度和光照强度对吸收速率的影响;3. 通过理论推导,构建解吸附CO2浓度与吸附剂质量、温度以及吹扫气流量等的关系,获得空气CO2捕集与植物增产的耦合模型并计算CO2捕集的能耗与成本。
结论:1. 季铵型聚合物材料吸附CO2的平衡常数随温度的升高而降低;吸附、解吸附动力学常数随温度的升高而升高。2. CO2供给植物增产的最佳浓度和光照强度为1000 ppm和8000 lux。3. 基于优化的空气捕集与植物利用的耦合算法,CO2的捕集能耗与成本分别为35.67 kJ/mol和34.68 USD/t。


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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