Yuandong Yang

• Lecturer at Shandong University

Thermochemical energy storage (TCES) is one of the key technologies facilitating the integration of renewable energy sources and mitigating the climate crisis. Recently, Li4SiO4 has been reported to be a promising heat carrier material for TCES applications, owing to its moderate operation temperature and stability. During the synthetic processes,...

Thermochemical energy storage has been considered as a promising technology for the future high-temperature solar thermal conversion and utilization in concentrated solar power plants. In this work, Li 4 SiO 4 /CO 2 ther-mochemical energy storage system was designed based on the reversible reaction Li 4 SiO 4 + CO 2 ↔Li 2 SiO 3 + Li 2 CO 3. The pro...

In recent years, biomass derived Li4SiO4 adsorbent has attracted increasing attentions in the field of post-combustion high-temperature CO2 capture. In this work, for the first time, industrial fly ash collected from the biomass boiler was employed to produce Li4SiO4 adsorbent. In addition, ash pretreatment methods including water-washing and acid-...

This review summarized the principles and processes of different granulation methods and analyzed the effects on the mechanical and CO2 uptake performances. The extrusion method, extrusion-spheronization method, and casting method with the external force can compact the structure of sorbent to improve the compressive strength but decrease the initi...

The bagasse, which is a typical agricultural and forestry waste, was employed as the silicon source to produce Li4SiO4-based ceramics with superior CO2 sorption performance. It is found that the presence of impurities elements in the bagasse ash will bring complex side reactions and form side products during the sorbent preparation process, which a...

Eutectic doping has been considered one of the most efficient and economic approaches to modify Li4SiO4-based CO2 adsorbents. Nevertheless, neither systematic screening nor selection criteria have been provided for the prediction of potential dopants. Hence, in this work, 12 kinds of molten salt dopants, including 5 unreported, were systematically...

ARTICLE INFO Keywords: Thermo chemical energy stor ag e Ca O-Based pellets TiO 2 incorpora tion Pore-form ing template Mechan ical strength ABSTRACT Calcium looping process (CaL) is a promising thermoch em ical energy storage tech nology for the application in the 3rd generation concentrated solar power plants (CSP). Henc e, it is necessary to deve...

High-temperature CO2 capture by using Li4SiO4-based adsorbent has been considered as an efficient approach to alleviate the global warming problem. However, the relatively low conversion and lake of suitable pelletization approach still limit the applications of Li4SiO4 in practical looping system. In this work, high-performance Nd-doped Li4SiO4-ba...

It has been widely acknowledged that the Li4SiO4-based adsorbents with smaller particle size and tailored structure will certainly exhibit superior CO2 capture performance. In this work, a novel two-phase synthesis method was proposed to produce tailored micro-scale Li4SiO4-based adsorbents with ultrafast CO2 capture rate. The effects of synthetic...

In the present study, a novel combustion method was proposed to synthesize nanomaterials, and nano-sized MnOx was prepared by this method as example. Being different from the traditional solution combustion synthesis method, a cigarette butt (CB, a typical municipal solid waste), rather than the pure soluble organics (e.g., glycine, urea, citric ac...

Granulation is an effective method to mitigate the issue of CaO-based sorbent elutriation in the calcium looping process. To further enhance CO2 capture performance of CaO-based pellets, pore-forming templates are usually added. In this work, rice straw, wheat straw and corn stalk, were adopted as the pore-forming templates. The effect of different...

Li4SiO4-based adsorbent is considered as a promising choice for the CO2 removal from power plants' flue gases. However, the relatively high raw materials cost still limits its industrial applications. In this work, aiming to reduce the cost of Si-source, three novel natural occurring minerals including the pumicestone, the montmorillonite and the a...

In recent years, high-temperature post-combustion carbon capture (PCC) using regenerable lithium orthosilicate ceramics has drawn extensive attention. However, the low conversion rate of Li4SiO4 is still one of the toughest obstacles limiting its practical applications. In this work, a mechanochemical activation method was used for the modification...

Rapid loss-incapacity of naturally occurring limestone for CO 2 capture is the most prominent issue in the calcium looping process. The synthesis of highly efficient sintering-resisting sorbents is a common solution to mitigate capacity decay. However, the long-term CO 2 looping cycles, particularly in the presence of SO 2 , still cause the generat...

While CaO has exhibited promising prospects and been identified as one of the best candidates for high-temperature CO2 capture, it suffers a well-known problem of loss-in-capacity; that is, its sorption capacity decays quickly with the increase of cycle numbers. In the last decade, extensive work has been conducted on the incorporation of CaO into...

The rapid loss-incapacity and severe attrition are easily encountered for CaO-based sorbent during multiple CO 2 capture cycles. It is necessary to prepare the CaO-based CO 2 capture sorbent with high capability for CO 2 uptake and attrition resisting. In this work, the TiO 2-decorated CaO-based sorbent pellets were prepared via extrusion-spheroniz...

The highly efficient CuO-based oxygen carrier is prospectively applied in chemical-looping combustion process. The metal precursors and synthetic methods greatly affect the performance of the synthetic CuO-based oxygen carriers. The inorganic precursors are commonly used to synthesize CuO-based oxygen carriers, while the organometallic precursors a...

Li4SiO4-based ceramic has been considered as one of the most promising candidates for high-temperature CO2 capture owing to its relatively high sorption capacity and desirable cyclic stability. Si-source is one of the most important factors affecting the cost as well as the CO2 capture performance of Li4SiO4 sorbent. In this work, naturally occurri...

A semi-industrial preparation procedure of CaO-based sorbent pellets was developed for the calcium looping process. First, Ca12Al14O33 , was incorporated into CaO-based sorbents to enhance the cyclic stability via a wet mixing method. Then, spray-drying technology, was chosen to obtain well-mixed precursor powders quickly and efficiently in an indu...

This study proposes the use of multi-acidification to reactivate CaO-based sorbents and investigates the feasibility of this process under N2 or oxy-fuel (with and without SO2) calcination conditions. The multi-acidification process involves the repeated modifications of CaO-based sorbents using acid, such as the waste acid from industrial chemical...

Granulation of CaO sorbents is the prerequisite for the practical application of the calcium looping system for CO2 capture at high temperatures. This work, for the first time, proposed a simple and facile graphite-casting granulation technique to achieve the one-step pelletization of CaO-based sorbent pellets. The as-prepared pellets exhibited goo...

The sharp loss‐in‐capacity in CO2 capture as a result of sintering is a prominent drawback for CaO‐based sorbents used in the calcium looping process. The decoration of inert supports is effective to stabilize the cyclic CO2 capture performance of CaO‐based sorbents via sintering mitigation. Therefore, a range of Al‐decorated and Al/Mg co‐decorated...

In this study, a novel one-step graphite moulding pelletization method was used to produce porous Li4SiO4 adsorbent pellets conveniently. The produced pellets were primarily composed of Li4SiO4 phase from X-ray diffraction analysis. The as-prepared adsorbent pellets exhibited good sphericity and a uniform diameter distribution of 2–2.5 mm. The dete...

The rapid loss-in-capacity in CO2 capture is the major barrier to the application of abundantly available CaO-based natural minerals in calcium looping process. In this work, the mechanically activated method of wet ball-milling was tried to prepare highly efficient CO2 sorbents from naturally occurring dolomite. Two major operation parameters, bal...

Li4SiO4 sorbents for high-temperature CO2 removal have drawn extensive attention owing to their potential application in carbon capture and storage (CCS). The major challenge in the application lies in the poor CO2 capture performance under realistic conditions of low CO2 concentrations, owing to the dense structure and poor porosity. In this work,...

Although inert supports have been proved effective to enhance CO2 capture performance of CaO sorbents, more commonly used supports are derived from expensive raw materials (such as nitrates and organometallic precursors). This work utilized cheap waste sludge from the steel plant, which is of a high daily output and has not received effective reuse...

For practical application in calcium looping, the CaO-based sorbents need to be pelletized. However, the pelleting process, particularly the extrusion process will lead to the loss of specific surface area, hence weakening CO2 sorption performance of sorbent pellets. In previous studies, only limited modification methods were developed for CO2 sorp...

The traditional development of CaO-based sorbents to be used in calcium looping process (CLP) consists of two steps: producing powders with improved cyclic performance by sorbent modification, followed by the subsequent granulation. However, this traditional routine is complicated and energy-consuming. Moreover, the improved performance would be we...