Solar hybrid photo-thermochemical sulfur-ammonia water-splitting cycle: Photocatalytic hydrogen production stage

被引：22
|
作者：
Vagia, Ekaterini Ch. [1 ]
Muradov, Nazim [3 ]
Kalyva, Agni [1 ]
T-Raissi, Ali [2 ]
Qin, Nan [2 ]
Srinivasa, Arun R. [3 ]
Kakosimos, Konstantinos E. [1 ]
机构：
[1] Texas A&M Univ Qatar, Chem Engn Dept, Sustainable Energy & Clean Air Res Lab, SECAReLab, POB 23874, Doha, Qatar
[2] Univ Cent Florida, Florida Solar Energy Ctr, Cocoa, FL 32922 USA
[3] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 32期
关键词：
Solar; Hydrogen; Water splitting cycle; Cadmium sulfide; Zinc sulfide; Cocatalyst; VISIBLE-LIGHT ILLUMINATION; CDS; NANOPARTICLES; GENERATION; EVOLUTION; HETEROSTRUCTURES; NANOCRYSTALS; ZNS;
D O I：
10.1016/j.ijhydene.2017.06.210
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
One of the main limitations of existing solar thermochemical water-splitting cycles (WSC) are that they utilize only thermal component of the solar irradiation neglecting its photonic component. A new hybrid photo-thermochemical sulfur ammonia (HySA) WSC developed at the Florida Solar Energy Center allows circumventing this shortcoming. In the HySA cycle, water splitting occurs by means of solar beam splitting which enables utilization of the quantum (UV-Vis) portion of the solar spectrum in the hydrogen production stage and the thermal (IR) portion in the oxygen production stage. Present work investigates the photocatalytic hydrogen production step using narrow band gap CdS and CdS-ZnS composite photocatalysts, and ammonium sulfite as an electron donor. The choice of the electron donor was determined by the considerations of its regenerability in the thermal stages of the HySA cycle. This article examines the impact of photocatalyst and cocatalystloading, temperature, and light intensity on hydrogen production rates. Photocatalysts, cocatalysts and photoreaction products were analyzed by a number of materials characterization (XRD, SEM, TEM, EDS) and analytical (GC and IC) methods. The experimental data obtained provide guidance for the improved solar photoreactor design. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：20608 / 20624
页数：17
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