硝石と水銀の共同コントロール用触媒とその製法

• Format: Patent
• Language: Japanese
• Published: 05.01.2017
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

本開示は硝石と水銀の共同コントロール用触媒とその製法を公表する。述べる触媒は以下の質量パーセンテージの成分で構成される：担体：TiO272-98.6%、活性成分：V2O50.1-5%、WO3l-10%、Cr2O30.1-5%と Nb2O50.1-5%、助触媒0.1-3%。本開示は排気ガスの酸窒化物の還元に使われると当時に、零価水銀を二価水銀に酸化しコントロールする。高い脱硝性能を持つとともに、高い水銀酸化性能もあるので、目下の商用SCR触媒に対して、触媒の水銀酸化率を大幅に上げられる。我が国の石炭火力発電所における脱水銀要求を満足し、SO2/SO3転化率が低く、且つ、良い中毒対抗力があるため、コストが低く、性能が高い新型触媒である。 Disclosed are a catalyst for synergistic control of oxynitride and mercury and a method for preparing the same. The catalyst includes the following components by mass percentage: a carrier: TiO2 72%-98.6%, active components: V2O5 0.1%-5%, WO3 1%-10%, Cr2O3 0.1%-5% and Nb2O5 0.1%-5%, and a co-catalyst of 0.1%-3%. The present invention can be used for reducing the oxynitrides in a flue gas, meanwhile oxidizing zero-valent mercury into bivalent mercury and then controlling the reactions, has relatively high denitration performance and also has high mercury oxidation performance; compared with current commercial SCR catalysts, the mercury oxidation rate of the catalyst is improved to a great extent, which can adapt to the requirements for mercury removal in China's coal-fired power plants, the conversion rate of SO2/SO3 is relatively low, and the catalyst has a better anti-poisoning ability, and is a new catalyst with a low cost and high performance.