Catalytic NO reduction at high temperature by de-ashed chars with catalysts

Journal Article · Sun Apr 15 04:00:00 EDT 2007 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2006.04.004· OSTI ID:20880652

Zhong, B J; Tang, H ^[1]

---

1. School of Aerospace, Tsinghua University, Beijing 100084 (China)

To study the effect of single metal oxides contained in coal ashes on NO reduction at high temperature, experiments and predictions for NO reduction were conducted in a drop-tube furnace at 1223 to 1523 K. The de-ashed chars used in experiments were prepared from Chinese Shenfu bituminous coal, and then a single catalyst (KOH or NaOH) was added into the de-ashed chars. Experimental and predicted results show that NO is more easily reduced on chars from Shenfu bituminous char than on its de-ashed char, indicating that minerals in char have some catalytic effect on NO reduction. Experimental and predicted results, using de-ashed char with catalysts KOH or NaOH as fuels to reduce NO, also show that the catalysts have a great positive effect on NO reduction and that catalytic activity of KOH is slightly better than that of NaOH. The influence of temperature and stoichiometric ratio (SR) on catalytic NO reductions is also discussed briefly. (author)

• OSTI ID: 20880652
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 1-2 Vol. 149; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ASHES
BITUMINOUS COAL
CATALYSTS
CHARS
MINERALS
NITRIC OXIDE
OXIDES
POTASSIUM HYDROXIDES
REDUCTION
SODIUM HYDROXIDES
STOICHIOMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 1000-4000 K