ハイブリッド触媒燃焼器の研究(第3報)

概要

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Catalytic combustion method has been offering the potential of meeting SCR emissions levels and cost reduction. One of the main problems in developing a catalytic combustor is the durability of catalysts at high temperature operating conditions. The hybrid catalytic combustion concept has advantages concerned with durability of catalyst, because the catalyst can be operated within its tolerable temperature utilizing gas phase combustion occured at the downstream of the catalyst. This paper describes the full-scale hybrid catalytic combustor designed for a 200MW (1300℃) class gas turbine and its atmospheric pressure test results using natural gas fuel. The combustor consisted of a precombustion zone, a premixing zone, a catalyst zone and a gas phase combustion zone with a bypass valve. The catalyst was 450mm in diameter, consisted of Pd/ alumina washcoat on cordierite haneycomb. The hybrid catalytic combustor has experimentally demonstrated the capability of ultra low NO_x emission during atmospheric pressure test-ing. In addition, a pressurized small-scale combustion test and estimations of the combus-tor characteristics using a mathematical model were also carried out. These results have predicted that NO_x Ievels and catalyst pressure loss will be whithin the goals at full-pressure condition.
社団法人日本ガスタービン学会の論文
1992-09-10