title: Chemiluminescence analyzer of NOxas a high-throughput screening tool in selective catalytic reduction of NO.
abstract: A chemiluminescence-based analyzer of NOxgas species has been applied for high-throughput screening of a library of catalytic materials. The applicability of the commercial NOxanalyzer as a rapid screening tool was evaluated using selective catalytic reduction of NO gas. A library of 60 binary alloys composed of Pt and Co, Zr, La, Ce, Fe or W on Al2O3substrate was tested for the efficiency of NOxremoval using a home-built 64-channel parallel and sequential tubular reactor. The NOxconcentrations measured by the NOxanalyzer agreed well with the results obtained using micro gas chromatography for a reference catalyst consisting of 1 wt% Pt on γ-Al2O3. Most alloys showed high efficiency at 275 °C, which is typical of Pt-based catalysts for selective catalytic reduction of NO. The screening with NOxanalyzer allowed to select Pt-Ce(X)(X=1-3) and Pt-Fe(2)as the optimal catalysts for NOxremoval: 73% NOxconversion was achieved with the Pt-Fe(2)alloy, which was much better than the results for the reference catalyst and the other library alloys. This study demonstrates a sequential high-throughput method of practical evaluation of catalysts for the selective reduction of NO.
authors.affiliation: R&D Group Eco-Energy Team, Hyundai Engineering and Construction Co, LTD, 102-4 Mabuk-dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do, 446-716, Republic of Korea.
authors.forename: Kwang Seok
authors.initials: KS
authors.lastname: Oh
authors.affiliation: Department of Chemical and Biomolecular Engineering, Center for Ultramicrochemical Process Systems (CUPS) and Graduate school of EEWS (WCU), Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon, 305-701, Republic of Korea.
authors.forename: Seong Ihl
authors.initials: SI
authors.lastname: Woo
keywords: NOx; analyzer; chemiluminescence; high-throughput screening; selective catalytic reduction