scispace - formally typeset
Search or ask a question
Author

Shaoyin Zhang

Bio: Shaoyin Zhang is an academic researcher from Dalian Polytechnic University. The author has contributed to research in topics: Catalysis & Hydrogen production. The author has an hindex of 11, co-authored 18 publications receiving 500 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: A detailed analysis based on the spectroscopic technique revealed that reaction pathways proceeded along a mono-functional or bi-functional mechanism according to the types of active metal and support as mentioned in this paper.
Abstract: Hydrogen production from ethanol is regarded as a promising way for energy sustainable development, which is undergoing an explosive growth over the last decade. Besides operating conditions, hydrogen yield greatly dependent on the nature of metal and the support selected. To date, Rh based catalysts proved to be the most active systems due to the fact that Rh possessed the greatest capacity toward C–C bond cleavage. Support also played a critical role in terms of hydrogen selectivity and stability. MgO, CeO2 and La2O3 etc were evidenced as suitable supports because of their basic characteristic and/or redox capacity. A detailed analysis based on the spectroscopic technique revealed that reaction pathways proceeded along a mono-functional or bi-functional mechanism according to the types of active metal and support. Ethanol dehydrogenation and/or dehydration reaction mainly occurred on the support, and the diffusion/transformation of the intermediates took place at the metal–support interface. Meanwhile, active metal accelerated the decomposition reaction. The observed catalyst deactivation was normally assigned to the coke formation, active metal sintering and/or oxidation as well as the impurity in crude bio-ethanol. Hence, the scope of this review is to address the present progress in ethanol reforming for hydrogen production including catalyst development and the analysis of the reaction mechanism and kinetics in order to shed light on the design of high efficient catalyst systems and the fundamental understanding of ethanol conversion at the molecular level.

230 citations

Journal ArticleDOI
TL;DR: In this article, a stoichiometric feed composition for ethanol steam reforming over an Rh/CeO 2 catalyst was investigated with a stochastic feed composition, and it was shown that the strong interaction between Rh and ceria support efficiently inhibited Rh particles sintering and coke formation to guarantee catalyst stability.

77 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated syngas production from CO2 reforming of ethanol over an Ir/CeO2 catalyst and found that the Ir catalyst was more active and stable toward synggas formation.

43 citations

Journal ArticleDOI
TL;DR: In this paper, a supported Ir/CeO 2 catalyst was used in a micro-channel structured this paper to achieve high activity and hydrogen selectivity in the micro-structured reactor.

39 citations

Journal ArticleDOI
TL;DR: In this article, a porous zirconium phosphate (ZrP) catalyst was used for the dehydration of sorbitol to isosorbide under water-free conditions.
Abstract: A porous zirconium phosphate catalyst prepared by hydrothermal method was studied for the dehydration of sorbitol to isosorbide under water-free conditions. Various characterization techniques such as XRD, Raman, SEM, NH 3 -TPD and Pyridine adsorption etc were conducted to determine the textural and acidic properties of the catalyst so as to build the relationship between catalytic performance and catalyst structure. In screening tests with other solid acids, the as-prepared ZrP sample exhibited the promising catalytic behavior for isosorbide production probably assigned to its high surface area, porous structure and the adequate Bronsted acid sites. Full sorbitol conversion with as high as 73% isosorbide selectivity could be obtained at mild conditions (210 °C, 2 h). Noticeably, the ZrP catalyst could be repeatedly used without any obvious deactivation. Generally, the ZrP catalyst studied in this work possessed a great potentiality as an efficient heterogeneous solid acid catalyst for isosorbide production to diminish the application of homogeneous mineral acid.

37 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this paper, the authors present the current energy landscape, highlighting the hydrogen and the main characteristics of the technological routes for its production, as well as the prominent research on hydrogen technology, processes and their main characteristics.

462 citations

Journal ArticleDOI
TL;DR: A detailed discussion on the development of bimetallic Ni-based catalysts for DRM including nickel alloyed with noble metals (Pt, Ru, Ir etc.) and transition metals (Co, Fe, Cu) is presented.
Abstract: In recent years, CO2 reforming of methane (dry reforming of methane, DRM) has become an attractive research area because it converts two major greenhouse gasses into syngas (CO and H2 ), which can be directly used as fuel or feedstock for the chemical industry. Ni-based catalysts have been extensively used for DRM because of its low cost and good activity. A major concern with Ni-based catalysts in DRM is severe carbon deposition leading to catalyst deactivation, and a lot of effort has been put into the design and synthesis of stable Ni catalysts with high carbon resistance. One effective and practical strategy is to introduce a second metal to obtain bimetallic Ni-based catalysts. The synergistic effect between Ni and the second metal has been shown to increase the carbon resistance of the catalyst significantly. In this review, a detailed discussion on the development of bimetallic Ni-based catalysts for DRM including nickel alloyed with noble metals (Pt, Ru, Ir etc.) and transition metals (Co, Fe, Cu) is presented. Special emphasis has been provided on the underlying principles that lead to synergistic effects and enhance catalyst performance. Finally, an outlook is presented for the future development of Ni-based bimetallic catalysts.

368 citations

Journal ArticleDOI
TL;DR: In this paper, an overview of the current best performing catalysts for the reforming and partial oxidizing of liquid hydrocarbons for hydrogen production is summarized, along with a review of the recent progress in these areas of research.
Abstract: One of the most attractive routes for the production of hydrogen or syngas for use in fuel cell applications is the reforming and partial oxidation of hydrocarbons. The use of hydrocarbons in high temperature fuel cells is achieved through either external or internal reforming. Reforming and partial oxidation catalysis to convert hydrocarbons to hydrogen rich syngas plays an important role in fuel processing technology. The current research in the area of reforming and partial oxidation of methane, methanol and ethanol includes catalysts for reforming and oxidation, methods of catalyst synthesis, and the effective utilization of fuel for both external and internal reforming processes. In this paper the recent progress in these areas of research is reviewed along with the reforming of liquid hydrocarbons, from this an overview of the current best performing catalysts for the reforming and partial oxidizing of hydrocarbons for hydrogen production is summarized.

276 citations

Journal ArticleDOI
TL;DR: In this article, a review deals with the currently existing alternatives at the catalyst and reactor level to cope with catalyst deactivation and increase process stability, and then delves with the fundamental phenomena occurring during this catalysts deactivation.
Abstract: Undoubtedly, hydrogen (H2) is a clean feedstock and energy carrier whose sustainable production should be anticipated. The pyrolysis of biomass or waste plastics and the subsequent reforming over base (transition) or noble metals supported catalysts allows reaching elevated H2 yields. However, the catalyst used in the reforming step undergoes a rapid and severe deactivation by means of a series of physicochemical phenomena, including metal sintering, metallic phase oxidation, thermal degradation of the support and, more notoriously, coke deposition. This review deals with the currently existing alternatives at the catalyst and reactor level to cope with catalyst deactivation and increase process stability, and then delves with the fundamental phenomena occurring during this catalyst deactivation. An emphasis is placed on coke deposition and its influence on deactivation, which depends on its location, chemical nature, morphology, precursors or formation mechanism, among others. We also discuss the challenges for increasing the value of the carbon materials formed and therefore, enhance process viability.

248 citations

Journal ArticleDOI
TL;DR: In insights into the intrinsic mechanism involved in catalytic reforming are presented and guidance is provided to the development of novel catalysts and processes for the efficient utilization of oxygenates for energy and environmental purposes.
Abstract: This Review describes recent advances in the design, synthesis, reactivity, selectivity, structural, and electronic properties of the catalysts for reforming of a variety of oxygenates (e.g., from simple monoalcohols to higher polyols, then to sugars, phenols, and finally complicated mixtures like bio-oil). A comprehensive exploration of the structure–activity relationship in catalytic reforming of oxygenates is carried out, assisted by state-of-the-art characterization techniques and computational tools. Critical emphasis has been given on the mechanisms of these heterogeneous-catalyzed reactions and especially on the nature of the active catalytic sites and reaction pathways. Similarities and differences (reaction mechanisms, design and synthesis of catalysts, as well as catalytic systems) in the reforming process of these oxygenates will also be discussed. A critical overview is then provided regarding the challenges and opportunities for research in this area with a focus on the roles that systems of ...

237 citations