Article
Engineering, Chemical
Soo Youp Park, Pil -Sang Youn, Dong Hun Lee, Daewook Kim, Yooseob Won, Jeong-Hoo Choi, Ji Bong Joo, Sung-Ho Jo, Ho-Jung Ryu
Summary: This study investigates particle attrition induced by bubbles in a bubbling fluidized bed using CO2 adsorbent particles. The relationship between the rate of attrition by gas jets and the rate of attrition by bubbles is revealed, showing that the rate constant of attrition by bubbles is the product of the rate constant of attrition by gas jets and dimensionless particle diameter. The results show that the rate of attrition by bubbles is proportional to the energy given to the bed solids by bubbles, and the size of the fine particles formed by attrition increases with bed mass and gas velocity.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Hao Zhang, Tao Jiang, Hamzah A. S. M. Yaseen, Yujun Zhao, Shengping Wang, Xinbin Ma
Summary: By using pseudo-boehmite and nitric acid as binder and peptizer, the study successfully improved the chemical and mechanical properties of CaO-based adsorbent pellets. The optimal addition of 3% pseudo-boehmite and 15% nitric acid resulted in the best performance.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Hao Zhang, Tao Jiang, Hamzah A. S. M. Yaseen, Yujun Zhao, Shengping Wang, Xinbin Ma
Summary: The experimental results showed that longer time resulted in more severe breakage of particles, while larger particles exhibited better attrition resistance. Higher gas velocity increased the attrition rate, whereas larger orifice number and orifice diameter reduced the degree of attrition.
Article
Chemistry, Multidisciplinary
Silvera Scaccia, Livia Della Seta, Daniele Mirabile Gattia, Giuseppina Vanga
Summary: A novel Ni/CaO-Ca12Al14O33 catalyst was prepared by Ni wet impregnation on a mixed calcium-aluminum-oxide (CAO) support, which exhibited good stability and low carbon deposition during dry reforming of methane. In contrast to the reference catalyst Ni/gamma-Al2O3, the novel catalyst showed higher basicity and better performance in the reaction.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Environmental Sciences
Shu-Ling Hsieh, Fang-Yu Li, Pei-Ying Lin, David E. Beck, Rajendranath Kirankumar, Gan-Jie Wang, Shuchen Hsieh
Summary: This study synthesized CaO adsorbents with good CO2 adsorption capacity using eggshell waste, achieving 0.6 gCO2/g-sorbent. CaO modified with a dopamine-containing polymer showed an adsorption capacity of 0.62 gCO2/g-sorbent, maintaining excellent performance even after 10 cycles of adsorption. The use of eggshell waste to synthesize CaO-based adsorbents for effective CO2 adsorption not only reduces environmental waste, but also has the potential to capture greenhouse gas CO2 emissions, aligning with the principles of green chemistry.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Jialin Wu, Xuan Liu, Rumeng Zhang, Jianbin Zhang, Huayan Si, Zhaojun Wu
Summary: This study proposes a simultaneous titration-calcination strategy to synthesize a novel core-shell type composite adsorbent with strong stability for CO2 capture. By doping CeO2 as an inert dopant, the adsorption activity of the adsorbent is enhanced, and the ion migration during the carbonation process is promoted. The Ca/Ce doping ratio of 24:1 exhibits the best CO2 capture performance, and the adsorption amount remains stable after multiple cycles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Zaza Hazrina Hashim, Yasutaka Kuwahara, Abdul Rahman Mohamed, Hiromi Yamashita
Summary: Utilizing the reversible reaction between CaO and CO2, the calcium looping (CaL) process is a widely studied CO2 adsorption and sequestration technique. However, the CO2 capture capability of CaO-based sorbents during cyclic operation is a significant issue. In this study, a CaOCa12Al14O33 (BFS-CaO-CAO) composite was synthesized from blast furnace slag (BFS) using nitric acid and hydrochloric acid. The synthesized adsorbent showed better CO2 adsorption and regenerative ability compared to an analog synthesized with hydrochloric acid. The presence of mayenite effectively prevented sintering and agglomeration of CaO particles.
ISIJ INTERNATIONAL
(2023)
Article
Energy & Fuels
Yuning Chen, Yun Long, Jian Sun, Shengbin Bai, Yijie Chen, Zhanliang Chen, Chuanwen Zhao
Summary: By incorporating varying amounts of cellulose in the outer shell of calcium looping pellets, researchers were able to improve the mechanical properties of the pellets and enhance CO2 capture performance. The addition of cellulose reinforced the cement-based outer shell and promoted accessibility of CO2 to the highly reactive core, resulting in superior CO2 capture capacity.
Article
Chemistry, Applied
Yujie Zhang, Jiaofei Wang, Juntao Wei, Youming Yang, Peng Lv, Weiguang Su, Yonghui Bai, Xudong Song, Guangsuo Yu
Summary: Biomass catalytic pyrolysis is an effective method for clean and carbon-negative utilization of biomass. CaO-H microspheres were used to adsorb CO2 and catalyze the reforming of bio-oil in the pyrolysis process of rice straw. CaO-H showed stronger basic sites and better CO2 adsorption capacity, leading to increased yields of phenols and ketones and decreased CO2 emissions.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ren-Wei Chang, Chin-Jung Lin, Ya-Hsuan Liou
Summary: A CaTiO3-decorated CaO-based CO2 adsorbent with good crystalline structure and high thermal stability was prepared through a simple fabrication process. With the appropriate calcium and titanium ratio, the adsorbent exhibited excellent CO2 capture capacity. CaTiO3 induced uniform dispersion of CaO on its surface, leading to outstanding kinetics and stability.
Article
Chemistry, Multidisciplinary
Yasutaka Kuwahara, Aiko Hanaki, Hiromi Yamashita
Summary: This study presents a facile method to convert converter slag into a CaO-Fe3O4-SiO2 composite with high CO2 adsorption performance, which can be used as an efficient solid adsorbent for CO2 capture. It offers an alternative approach that may provide solutions to both recycling of waste slag and recovery of CO2 gas that the iron and steel-making industry is currently confronting.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Mohammad Heidari, Maryam Tahmasebpoor, Seyed Borhan Mousavi, Covadonga Pevida
Summary: The study focused on developing a novel synthetic adsorbent using the sol-gel autocombustion method, incorporating ZrO2, Al2O3, and CeO2 during the development of CaO adsorbent. The research found that the adsorbent with a molar ratio of 20/1 of calcium precursor to promoters showed the best performance, with the highest sorption capacity and CaO conversion rate. Additionally, the cyclic performance of modified adsorbents was found to be directly proportional to their morphological properties, with CN/20 demonstrating the best overall performance in capturing CO2.
JOURNAL OF CO2 UTILIZATION
(2021)
Review
Chemistry, Multidisciplinary
Vivek Polshettiwar
Summary: This article introduces the characteristics, synthesis methods, and applications of dendritic fibrous nanosilica (DFNS), as well as its tunability in particle size, surface area, pore volume, pore size, and fiber density.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Swati Mehta, Jitendra Bahadur, Debasis Sen, Divya Nechiyil, H. Bhatt, Naveen Kumar, Jyoti Prakash
Summary: This study presents a simple, cost-effective, and eco-friendly approach for producing polyethyleneimine (PEI)-assisted silver nanoparticle-supported silica microspheres. The microspheres exhibit good sensing properties and high sensitivity in detecting hydrogen peroxide and rhodamine 6G, demonstrating their potential use in biomedical and sensing technologies.
Article
Chemistry, Multidisciplinary
Khaled Baamran, Ali A. Rownaghi, Fateme Rezaei
Summary: In this study, bifunctional adsorbent/catalyst materials (BFMs) consisting of CaO adsorbent with Cr2O3-V2O5/ZSM-5 catalysts were synthesized and shaped through additive manufacturing. The physical and chemical properties of structured CaO/Cr2O3-V2O5/ZSM-5 adsorbent/catalyst monoliths were characterized and evaluated. The effects of operating conditions on CO2 capture and selective formation of ethylene and hydrogen were investigated. The best performance was observed for CaO/Cr1-V3/ZSM-5 with balanced reaction pathways, resulting in high CO2 capture capacity, CO2 conversion, and selectivity for ethylene and syngas.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
