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Hirofumi Kikkawa

Researcher at Hitachi

Publications -  34
Citations -  662

Hirofumi Kikkawa is an academic researcher from Hitachi. The author has contributed to research in topics: Flue gas & Flue-gas desulfurization. The author has an hindex of 14, co-authored 34 publications receiving 647 citations. Previous affiliations of Hirofumi Kikkawa include Mitsubishi & Wisconsin Alumni Research Foundation.

Papers
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Journal ArticleDOI

Study of elemental mercury re-emission in a simulated wet scrubber

TL;DR: In this article, the effect of scrubber temperature and pH, ionic mercury concentration in the liquor, total sulfite, and chloride and bromide ion concentration in solution on mercury re-emission was investigated.
Journal ArticleDOI

New wet FGD process using granular limestone

TL;DR: In this article, a new wet limestone−gypsum process for flue gas desulfurization (FGD) has been developed, which utilizes granular limestone directly as a desulphurizing reagent.
Journal ArticleDOI

Study of Hg and SO3 behavior in flue gas of oxy-fuel combustion system

TL;DR: In this article, Babcock-Hitachi conducted tests using a 1.5MWth Combustion & Air Quality Control System (AQCS) test facility which consists of oxygen supply unit, furnace, Selective Catalytic Reduction (SCR) catalyst, Clean Energy Recuperator (CER), Dry Electrostatic Precipitator (DESP), flue gas recirculation system, wFGD, and CO 2 Compression and Purification Unit (CPU).
Patent

Exhaust gas treating method and apparatus

TL;DR: In this paper, the following devices are successively disposed in the following order from an upstream side to a downstream side in an exhaust gas duct of a combustion apparatus: an air preheater, preheating combustion air for use in exhaust gas treating apparatus; a heat recovery unit, recovering exhaust gas heat at an exit of the air pre-heater; a precipitator, collecting soot/dust contained in a exhaust gas at the exit of a heat recor-tator; a wet flue gas desulfurizer, removing sulfur oxides contained in the
Patent

Method and apparatus for treating discharge gas

TL;DR: In this article, the following devices are successively disposed in the following order from the upstream side to the downstream side in the discharge gas duct of a combustion apparatus: an air preheater which preheats combustion air for use in the apparatus for discharge gas treatment, a heat collector which recovers discharge-gas heat at the outlet of the air pre-heater, a dust collector which collects soot/dust contained in discharge gas at the outlets of the heat collector, a wet flue-gas desulfurizer which removes sulfur oxides contained in the discharged gas at