4.7 Review

Reaction mechanism of H2S with Hg0 on CuFe2O4 oxygen carrier with oxygen vacancy structure during coal chemical looping gasification

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Energy & Fuels

Investigation on the oxygen-carrying performance and reaction kinetics of CaMnxFe1-xO3-δ perovskites prepared from red mud

Wenzheng Liang et al.

Summary: In this study, two Ca/Mn/Fe perovskite oxygen carriers derived from red mud and pure reagents were prepared for the chemical looping combustion of biomass. The perovskites derived from red mud exhibited better cycling stability, while the reagent-based perovskites showed higher total oxygen transport capacity. The addition of red mud did not affect the reactivity of perovskites.
Review Chemistry, Multidisciplinary

Descriptors for the Evaluation of Electrocatalytic Reactions: d-Band Theory and Beyond

Shilong Jiao et al.

Summary: Closing the carbon, hydrogen, and nitrogen cycle with renewable electricity offers potential solutions for the current environmental and energy crisis, while also supporting the continued prosperity of human society. Descriptors play a crucial role in bridging the gap between the physicochemical factors of electrocatalysts and their enhanced activity, providing guiding principles for the rational design process. By following indicators like d-band center, Delta G(H), E-O*, coordination number (CN), and bond length, it is possible to access the optimal adsorption strength of key intermediates.

ADVANCED FUNCTIONAL MATERIALS (2022)

Review Agricultural Engineering

Gasification of municipal solid waste (MSW) as a cleaner final disposal route: A mini-review

Duu-Jong Lee

Summary: This mini-review provides an overview of current research and development efforts in producing hydrogen-rich syngas from municipal solid waste (MSW) by pyrolysis/gasification. The focus is on syngas upgrades and novel gasification processes, with the goal of making MSW gasification a sustainable and affordable route for waste disposal. A graphical assessment protocol is proposed to aid in understanding the main reactions involved in MSW gasification, and future prospects are considered for reference in further studies.

BIORESOURCE TECHNOLOGY (2022)

Article Engineering, Environmental

Novel Counteraction Effect of H2O and SO2 toward HCl on the Chemical Adsorption of Gaseous Hg0 onto Sulfureted HPW/γ-Fe2O3 at Low Temperatures: Mechanism and Its Application in Hg0 Recovery from Coal-Fired Flue Gas

Chang Wang et al.

Summary: Sulfureted phosphotungstic acid-grafted gamma-Fe2O3 showed excellent performance in recovering gaseous Hg-0, but the presence of HCl, SO2, and H2O together could affect the chemical adsorption of Hg-0 due to competition among different species.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

Article Engineering, Environmental

Mercury/oxygen reaction mechanism over CuFe2O4 catalyst

Yingju Yang et al.

Summary: CuFe2O4 exhibits optimal catalytic activity towards mercury oxidation at 150 degrees C, with the reactivity difference of different lattice oxygen species affecting the catalytic activity. The inverse spinel structure is favorable for O-2 activation, and the energy barrier for mercury oxidation by chemisorbed oxygen is lower than that of lattice oxygen.

JOURNAL OF HAZARDOUS MATERIALS (2022)

Article Chemistry, Physical

Rationally Tailoring Catalysts for the CO Oxidation Reaction by Using DFT Calculations

Dengxin Yan et al.

Summary: Tailoring specific surface sites with different elements can help predict the catalytic behavior of more complex alloys, reducing the computational cost of identifying catalyst candidates for CO oxidation reaction.

ACS CATALYSIS (2022)

Article Energy & Fuels

Chemical looping gasification and sorption enhanced gasification of biomass: A perspective

Jinze Dai et al.

Summary: Chemical looping gasification (CLG) and sorption enhanced gasification (SEG) of biomass are promising technologies for improving energy efficiency and simplifying the production processes of renewable hydrogen, synthetic fuels, and chemicals. This paper reviews the state-of-the-art of CLG and SEG, summarizes the impact of key process parameters, and discusses research needs and outlook.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2022)

Article Chemistry, Applied

Removal of mercury from flue gas using coal gasification slag

Zhaoxin Wan et al.

Summary: Coal combustion emits mercury, which can be removed using coal gasification fine slag (FS) immobilized with ionic liquids (IL-T and IL-B). The efficiency of mercury removal increased when supported by the ILs. The presence of SO2 had negligible impact on Hg0 capture. The total mercury removal efficiencies exceeded 90% for FS-T and FS-B in a specific atmosphere. The effective adsorption time for FS-T and FS-B was longer than FS, and Hg-0 and Hg2+ were detected in exhaust gas and solid phase.

FUEL PROCESSING TECHNOLOGY (2022)

Article Materials Science, Multidisciplinary

Inhibited grain growth to strengthen the redox performance of CuFe2O4 via SiO2 as a support for the chemical looping gasification

Mei An et al.

Summary: In this study, the role of the inert component SiO2 in CuFe2O4/SiO2 oxygen carrier during multiple cycles was investigated through various characterization analyses. The results showed that SiO2, as a second-phase particle, inhibited the growth of CuFe2O4 grains and maintained the integrity of the microwave structure of the oxygen carrier, thereby enhancing the cycle stability in chemical looping gasification.

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T (2022)

Article Engineering, Environmental

Charge distribution modulation and morphology controlling of copper selenide for an enhanced elemental mercury adsorption activity in flue gas

Hailong Li et al.

Summary: This study developed a charge distribution modulation strategy to improve the adsorption capacity and adsorption rate of metal selenide ligands for elemental mercury (Hg0) remediation. The modulated copper selenide (Cu2Se) ligand exhibited environmentally stable immobilization of Hg0 as mercury selenide (HgSe) and showed higher adsorption capacity and faster adsorption rate compared to regular Cu2Se. Additionally, the modulation technique allowed for the construction of thinner and larger nanosheets, providing more active sites for binding Hg0. This newly designed method has significant implications for real-world applications.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Thermodynamics

Interaction mechanism among CO, H 2 S and CuO oxygen carrier in chemical looping combustion: A density functional theory calculation study

Chaohe Zheng et al.

Summary: This study used density functional theory (DFT) calculations to investigate the interaction among H2S, CO, and CuO in chemical looping combustion (CLC). The results show that CO inhibits the dissociation of H2S, while the presence of H2S dissociation products has a mixed impact on CO oxidation activity.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2021)

Article Energy & Fuels

Mercury removal by Co3O4@TiO2@Fe2O3 magnetic core-shell oxygen carrier in chemical-looping combustion

Kailong Xu et al.

Summary: Mercury pollution, primarily from coal combustion, poses a serious threat to both human health and ecosystems. A magnetic material, CTF, was developed to enhance the removal of elemental mercury (Hg-0) during chemical-looping combustion of coal (CLCC). Results showed that CTF promoted the conversion of Hg-0 to Hg2+/HgP in the presence of HCl, contributing to a higher mercury removal efficiency.
Review Chemistry, Applied

Removal of pollution from the chemical looping process: A mini review

Hongming Jiang et al.

Summary: The chemical looping process (CLP) technology has shown promise in reducing emissions and removing pollutants by achieving zero-CO2 emissions and utilizing cascade energy. Fe-based oxygen carriers are considered the most promising materials for practical application in pollutant removal, showing significant potential in environmental protection.

FUEL PROCESSING TECHNOLOGY (2021)

Article Engineering, Environmental

The adsorption mechanisms of Hg0 on marcasite-type metal selenides: The influences of metal-terminated site

Hailong Li et al.

Summary: This study systematically investigated the immobilization mechanisms of elemental mercury on marcasite-type metal selenides based on density functional theory, finding that the adsorptions of Hg-0 at metal sites are mainly influenced by the 4p orbitals of metal atoms, while interactions at Se sites are affected by both the 5s and 4p orbitals of Se atoms. The influences of metal-terminated sites on Hg-0 adsorptions at Se sites are relatively limited.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Multidisciplinary

Characteristic Evaluation and Process Simulation of CuFe2O4 as Oxygen Carriers in Coal Chemical Looping Gasification

Xiao Zhu et al.

Summary: CuFe2O4 is identified as a high-performance oxygen carrier with the ability to effectively relieve deep oxygen loss, enabling high carbon conversion and syngas productivity in the CLG process.

ACS OMEGA (2021)

Article Energy & Fuels

Mechanistic study of the effect of oxygen vacancy and sulfur poisoning on the reaction of copper ferrite spinel with CO during chemical-looping combustion

Yu Li et al.

Summary: The oxygen vacancy and sulfur poisoning significantly affect the CO adsorption and oxidation processes on the copper ferrite surface, with static sulfur and dynamic sulfur showing different reaction mechanisms in CO oxidation.
Article Chemistry, Applied

Behavior of mercury in chemical looping with oxygen uncoupling of coal

Jinchen Ma et al.

Summary: This study investigates the behavior of mercury and the role of oxygen carrier in the CLOU process of Pingdingshan anthracite, finding that the removal efficiency of Hg-0(g) by the oxygen carrier is 60.71% and the adsorption capacity of Hg(p) is 0.281 μg/g. The oxygen carrier promotes the oxidation of Hg-0(g) and reduces the mercury released in the air.

FUEL PROCESSING TECHNOLOGY (2021)

Article Engineering, Environmental

Engineering of crystal phase over porous MnO2 with 3D morphology for highly efficient elimination of H2S

Xiaohai Zheng et al.

Summary: In this study, alpha-, beta- and delta-MnO2 catalysts with hierarchically porous structure were prepared using a facile oxalate-derived hydrothermal method. The phase-dependent behavior for selective oxidation of H2S over MnO2 catalysts was studied, revealing that delta-MnO2 exhibited superior activity and stability with almost 100% H2S conversion and sulfur selectivity. The hierarchically porous structure of delta-MnO2 nanosphere suppressed the generation of by-products SO2 and sulfate, making Mn-based catalysts more suitable for industrial applications.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Chemistry, Physical

Different Reactivities of the (100) and (110) Surfaces of the NiFe2O4 Composite Oxygen Carrier in Chemical Looping Combustion: An Atomic Insight

Feng Liu et al.

Summary: Spinel NiFe2O4 is considered as a promising oxygen carrier for chemical looping combustion due to its improved reactivity, with Ni-O bridge sites identified as the most favorable for CO adsorption. The (110) surface, with lower oxygen saturation, exhibits higher adsorption activity for CO compared to the (100) surface. The coordination of oxygen with metal atoms significantly affects the reactivity, with oxygen bridged with Ni showing higher activity than with Fe atoms. These findings could guide the optimization of spinel NiFe2O4 for efficient CLC processes.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Energy & Fuels

Theoretical insights into H2S reaction mechanism over CuFe2O4 oxygen carrier

Yu Li et al.

Summary: CuFe2O4 is a promising oxygen carrier due to its high reactivity and resistance to sintering, but it may be poisoned by H2S in fuel gas during chemical-looping combustion. Investigating the reaction mechanism of H2S over CuFe2O4 revealed dehydrogenation, H2O production, and SO2 formation, with the presence of O vacancies affecting the adsorption energies of H2S and the energy barrier for H2O production.

JOURNAL OF THE ENERGY INSTITUTE (2021)

Review Energy & Fuels

Chemical looping-A perspective on the next-gen technology for efficient fossil fuel utilization

Anuj Joshi et al.

Summary: This article discusses the advances in chemical looping technology, including the fundamentals of formulation concepts on chemical looping carriers, rationale for reactor configurations, and system optimization through process simulation. It also elaborates on the carriers utilized for different chemical looping applications and reactor configurations applied for different systems, as well as describing the prospects of future development in chemical looping technology.

ADVANCES IN APPLIED ENERGY (2021)

Article Environmental Sciences

Release characteristics of mercury in chemical looping combustion of bituminous coal

Ling Ji et al.

JOURNAL OF ENVIRONMENTAL SCIENCES (2020)

Article Engineering, Environmental

Fate of Mercury in Volatiles and Char during in Situ Gasification Chemical-Looping Combustion of Coal

Jinchen Ma et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2019)

Article Engineering, Chemical

First-Principle Study on Heterofullerenes: Effective and Multifunctional in Hg Removal

Qingli Tang et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2019)

Article Engineering, Chemical

Transformation and Migration of Mercury during Chemical-Looping Gasification of Coal

Mei An et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2019)

Article Chemistry, Physical

Shear-Assisted Formation of Cation-Disordered Rocksalt NaMO2 (M = Fe or Mn)

Tan Shi et al.

CHEMISTRY OF MATERIALS (2018)

Article Engineering, Environmental

Mechanistic studies of mercury adsorption and oxidation by oxygen over spinel-type MnFe2O4

Yingju Yang et al.

JOURNAL OF HAZARDOUS MATERIALS (2017)

Article Engineering, Chemical

Application of Spent H2S Scavenger of Iron Oxide in Mercury Capture from Flue Gas

Lina Han et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2016)

Article Energy & Fuels

Study of Hg0 removal characteristics on Fe2O3 with H2S

Ting Liu et al.