Woven Stainless Steel Wire Mesh Supported Catalyst for NOX Reduction in Municipal Solid Waste Flue (MSW) Gas: Synthesis and Characterization

Kamariah Noor Ismail, and Ku Halim Ku Hamid, and Sharifah Aishah S.A. Kadir, and Mohibah Musa, and Savory, Robert Mikhail (2007) Woven Stainless Steel Wire Mesh Supported Catalyst for NOX Reduction in Municipal Solid Waste Flue (MSW) Gas: Synthesis and Characterization. Malaysian Journal of Analytical Sciences, 11 (1). pp. 246-254. ISSN 13942506

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Affiliations

Universiti Teknologi MARA, Faculty of Chemical Engineering

Abstract

This paper presents the synthesis and characterization of a highly porous and well-adhere catalyst immobilised on a woven stainless steel wire mesh (WSSWM). The prepared catalyst is used to reduce oxide nitrogen, NOx in MSW incineration flue gas. A circular wire mesh 90mm in diameter consisting of a hundred cells per square inch (cpsi) was used as the catalyst support . The surface of the WSSWM was pre-treated and passivated by sonicating with 1M inorganic acid for 30 minutes followed by rinsing with distilled water and drying at 50°C for 3 hours. The WSSWM was repeatedly dip -coated in a rheologically modified Al2O3-SiO2 slurry until desired loading was attained. Impregnation of vanadium oxide on the wire mesh followed by drying at 102°C for 12 hours and calcining at 500°C for 5 hours, with a heating rate of 4°C/min, yielded the final NOx reduction catalyst. Qualitative porous analysis and the crystallinity of the impregnated catalyst were investigated using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD), respectively. The adhesion strength of the catalyst was examined using the in-house KH-Adhesion Test Method. Results from catalyst characterization indicate its potential to be used for incinerator flue gas NOx reduction.

Kertas kerja ini membentangkan sintesis dan pencirian mangkin yang mempunyai keporosan tinggi dan tahap rekatan baik yang dipegunkan di atas permukaan jejaring dawai tahan karat. Mangkin ini digunakan untuk proses penurunan sebatian nitrogen oksida, NOx dalam gas serombong insinerator sisa pepejal bandaran. Jejaring dawai berbentuk bulat yang bergaris pusat 90.00 mm mengandungi seratus sel setiap inci persegi digunakan sebagai bahan pegun mangkin. Proses pra-rawatan dilakukan ke atas sampel-sampel jejaring dawai dimana ianya digetarkan dalam asid inorganik berkepekatan 1.0 M selama 30 minit untuk menyah-aktifkan permukaannya, diikuti dengan bilasan air suling dan dikeringkan pada suhu 50°C selama 3 jam. Proses penyalutan-celup di dalam buburan Al2O3-SiO2 diulang beberapa kali sehingga jumlah endapan yang diperlukan dicapai. Pemegunan mangkin vanadium oksida dilakukan dalam larutan vanadia diikuti dengan pengeringan pada suhu 102°C selama 12 jam dan seterusnya dikalsinkan pada 500°C selama 5 jam pada kadar 4°C/min menghasilkan mangkin untuk penurunan sebatian nitrogen oksida, NOx . Analisis terhadap keporosan dan penghabluran secara kualitatif dikaji dengan menggunakan Mikroskop Pengimbasan Elektron (SEM) dan Pembelauan sinar-x (XRD). Darjah kekuatan rekatan mangkin pada permukaan jejaring dawai dikaji menggunakan alat yang dibangunkan sendiri ditermakan sebagai Kaedah Uji Rekatan-KH. Keputusan pencirian yang dipeolehi menunjukkan mangkin yang dibangunkan mempunyai potensi untuk digunakan sebagai mangkin penurunan sebatian nitrogen oksida, NOx dalam gas serombong insinerator.

Item Type:

Journal

Additional Information:

The authors gratefully acknowledged the financial supports of the Institute of Research and Commercialization (IRDC) of Universiti Teknologi MARA (UiTM), research grant: 600-IRDC/ST.5/3/717

Keywords:

wire mesh, Al2O3-SiO2, impregnation, dip-coating, NOx reduction, flue gas

Subjects:

Q Science

ID Code:

1052