範立 椿

Bio: 範立 椿 is an academic researcher. The author has contributed to research in topics: Catalysis & Carbon monoxide. The author has an hindex of 6, co-authored 12 publications receiving 233 citations.

Catalyst for synthesizing formate and methanol and method for producing formate and methanol

Abstract: PROBLEM TO BE SOLVED: To provide a catalyst of which the decline in activity caused by water and carbon dioxide is little and which can synthesize a formate and methanol at a low temperature under a low pressure; and a production method using the catalyst. SOLUTION: The catalyst synthesizes a formate and methanol via the formate from a raw material gas containing hydrogen and at least either of carbon monoxide and carbon dioxide in the presence of an alcohol as a solvent. The catalyst contains both Cu and Zn as the main components and at least one component selected from among elements of group IV, group VI, group VII, group XIII, and lanthanoids as a promotor. COPYRIGHT: (C)2005,JPO&NCIPI

Method for producing liquid fuel by using capsule catalyst

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a liquid fuel in which methane selectivity and CO 2 selectivity are decreased and isoparaffin yield is increased in one stage from a synthetic gas. SOLUTION: The method for producing the liquid fuel comprises carrying out conversion reaction of a synthetic gas containing hydrogen and carbon monoxide in the presence of a particulate solid catalyst filmed by β-zeolite. COPYRIGHT: (C)2007,JPO&INPIT

Catalyst having hetero bimodal structure

Abstract: PROBLEM TO BE SOLVED: To provide a catalyst having a hetero bimodal structure which can exhibit the intrinsic ability of the catalyst even in liquid phase FT synthesis, has excellent production efficiency and can easily be produced. SOLUTION: In a catalyst including a porous carrier and a metal component carried on the porous carrier, the catalyst having the bimodal structure comprises the porous carrier having a macro pore with a pore diameter of 10 to 300 nm and a micro pore with a pore diameter of 1 to 10 nm by the layer of the metal component formed inside the macro pore. COPYRIGHT: (C)2007,JPO&INPIT

Method for producing propylene

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing propylene, capable of efficiently producing the propylene from dimethyl ether, by using a catalyst which is formed by making zirconium oxide supported on pentasil-type aluminosilicate, while keeping high catalytic activity even at a high temperature. SOLUTION: In this method for producing the propylene, a catalyst which is formed by making the zirconium oxide supported on the pentasil-type aluminosilicate having an SiO 2 /Al 2 O 3 mol ratio of 20-250 and then treating the supported material with an aqueous phosphoric acid solution and/or an aqueous sulfuric acid solution is used as the catalyst, when the propylene is produced by contacting the dimethyl ether with the catalyst in a gas phase. COPYRIGHT: (C)2006,JPO&NCIPI

Progress and Perspectives of Electrochemical CO2 Reduction on Copper in Aqueous Electrolyte

Abstract: To date, copper is the only heterogeneous catalyst that has shown a propensity to produce valuable hydrocarbons and alcohols, such as ethylene and ethanol, from electrochemical CO2 reduction (CO2R). There are variety of factors that impact CO2R activity and selectivity, including the catalyst surface structure, morphology, composition, the choice of electrolyte ions and pH, and the electrochemical cell design. Many of these factors are often intertwined, which can complicate catalyst discovery and design efforts. Here we take a broad and historical view of these different aspects and their complex interplay in CO2R catalysis on Cu, with the purpose of providing new insights, critical evaluations, and guidance to the field with regard to research directions and best practices. First, we describe the various experimental probes and complementary theoretical methods that have been used to discern the mechanisms by which products are formed, and next we present our current understanding of the complex reaction networks for CO2R on Cu. We then analyze two key methods that have been used in attempts to alter the activity and selectivity of Cu: nanostructuring and the formation of bimetallic electrodes. Finally, we offer some perspectives on the future outlook for electrochemical CO2R.

Heterogeneous Catalyst Deactivation and Regeneration: A Review

Abstract: Deactivation of heterogeneous catalysts is a ubiquitous problem that causes loss of catalytic rate with time. This review on deactivation and regeneration of heterogeneous catalysts classifies deactivation by type (chemical, thermal, and mechanical) and by mechanism (poisoning, fouling, thermal degradation, vapor formation, vapor-solid and solid-solid reactions, and attrition/crushing). The key features and considerations for each of these deactivation types is reviewed in detail with reference to the latest literature reports in these areas. Two case studies on the deactivation mechanisms of catalysts used for cobalt Fischer-Tropsch and selective catalytic reduction are considered to provide additional depth in the topics of sintering, coking, poisoning, and fouling. Regeneration considerations and options are also briefly discussed for each deactivation mechanism.

Challenges in the Greener Production of Formates/Formic Acid, Methanol, and DME by Heterogeneously Catalyzed CO2 Hydrogenation Processes.

Abstract: The recent advances in the development of heterogeneous catalysts and processes for the direct hydrogenation of CO2 to formate/formic acid, methanol, and dimethyl ether are thoroughly reviewed, with special emphasis on thermodynamics and catalyst design considerations. After introducing the main motivation for the development of such processes, we first summarize the most important aspects of CO2 capture and green routes to produce H2. Once the scene in terms of feedstocks is introduced, we carefully summarize the state of the art in the development of heterogeneous catalysts for these important hydrogenation reactions. Finally, in an attempt to give an order of magnitude regarding CO2 valorization, we critically assess economical aspects of the production of methanol and DME and outline future research and development directions.

Discovery of a Ni-Ga catalyst for carbon dioxide reduction to methanol

Abstract: The use of methanol as a fuel and chemical feedstock could become very important in the development of a more sustainable society if methanol could be efficiently obtained from the direct reduction of CO2 using solar-generated hydrogen. If hydrogen production is to be decentralized, small-scale CO2 reduction devices are required that operate at low pressures. Here, we report the discovery of a Ni-Ga catalyst that reduces CO2 to methanol at ambient pressure. The catalyst was identified through a descriptor-based analysis of the process and the use of computational methods to identify Ni-Ga intermetallic compounds as stable candidates with good activity. We synthesized and tested a series of catalysts and found that Ni5Ga3 is particularly active and selective. Comparison with conventional Cu/ZnO/Al2O3 catalysts revealed the same or better methanol synthesis activity, as well as considerably lower production of CO. We suggest that this is a first step towards the development of small-scale low-pressure devices for CO2 reduction to methanol.