Mitsubishi Heavy Industries Limited

National Institute of Advanced Industrial Science and Technology

Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd

Masatoshi Katsuki

Masazumi Tanoura

Shuuji Fujii

Daishi Ueno

Minoru Danno

Kenji Muta

Yuuko Ujihara

Eiji Kato

Yusuke Yamada

Atsushi Ueda

Yuko Ujihara

Takumi Suzuki

Tetsuya Sakuma

Kazuki Nishizawa

Tadashi Aoki

Takashi Fujinaga

Naohiro Yamada

Tomotsugu Masuda

Shinichiro Asami

Yosuke Mukai

Koji Higashino

Kageharu Moriyama

Taiji Uchida

Keita Inoue

An exhaust gas treating catalyst further improved in denitrification performance is provided. It is an exhaust gas treating catalyst containing a complex oxide represented by the general formula ABO, where the A-site is composed of a lanthanoid (La) and barium (Ba), and the B-site is composed of iron (Fe), niobium (Nb) and palladium (Pd).

Exhaust gas treating catalyst and exhaust gas purification apparatus using the same

An object of the present invention is to provide a flue gas purifying device that can efficiently decrease nitrogen oxides in flue gas. This object is solved by including: an exhaust pipe that guides flue gas discharged from a burning appliance; a urea-water injecting unit that injects urea water into the exhaust pipe; a catalytic unit arranged on a downstream side to a position where urea water is injected in a flow direction of flue gas and having a urea SCR catalyst; a first ammonia-concentration measuring unit that measures a concentration of ammonia in flue gas at a measurement position in a region where the catalytic unit is arranged; a second ammonia-concentration measuring unit arranged on a downstream side to the catalytic unit in a flow direction of the flue gas, to measure a concentration of ammonia in the flue gas having passed through the urea SCR catalyst; and a control unit that controls injection of urea water by the urea-water injecting unit based on measurement results acquired by the first and second ammonia-concentration measuring units.

Flue gas purifying device

An object of the present invention is to provide a flue gas purifying device that can suppress leakage of ammonia and can efficiently decrease nitrogen oxides in flue gas. The object is achieved by a flue gas purifying device including: an exhaust pipe; a urea-water injecting unit that injects urea water into the exhaust pipe; a catalytic unit that includes a urea SCR catalyst that promotes a reaction between ammonia and nitrogen oxides and a support mechanism that supports the urea SCR catalyst in the exhaust pipe, and is arranged on a downstream side to a position where urea water is injected; a concentration measuring unit arranged on a downstream side to the catalytic unit in a flow direction of flue gas to measure an ammonia concentration in flue gas having passed through the urea SCR catalyst; and a control unit that controls injection of urea water by the urea-water injecting unit based on an ammonia concentration measured by the concentration measuring unit.

An exhaust gas purification system which, in a wider temperature range, can reduce and remove nitrogen oxides in an exhaust gas by a reduction catalyst with the use of hydrogen as a reducing agent is provided. The exhaust gas purification system has an electronic control device () which controls an EGR valve () and an EGR pipe () so that the concentration of oxygen in the exhaust gas obtained from a data map based on the state of an engine () becomes less than a predetermined value, and which controls a microreactor () so that hydrogen is added to the exhaust gas when the concentration of oxygen in the exhaust gas is less than the predetermined value.

Exhaust gas purification system and exhaust gas purification method

An exhaust gas purification system, which upgrades exhaust gas purification while curtailing an increase in an operating cost, is disclosed. The exhaust gas purification system comprises an SCR catalyst for reducing and removing nitrogen oxides in an exhaust gas from an engine () by bringing the nitrogen oxides into contact with a reducing agent, oxidation catalysts () for oxidizing gas components in the exhaust gas, a water electrolysis device () for producing oxygen by electrolyzing water, and an oxygen supply pipe () for supplying the oxygen produced by the water electrolysis device () to the exhaust gas.

A method and apparatus for measuring density which can simultaneously measure gaseous substance density and solid particulate material density and further can simultaneously measure the densities of a plurality of materials such as black smoke, white smoke, and water vapor. The method includes irradiating a laser having at least one wavelength equivalent to an absorption wavelength of each gaseous substance to be measured.

Method and apparatus for measuring density

Growing community of inventors

Yokohama, Japan

Masatoshi Katsuki