Executive Summary : | The most widely used technique for NOx removal from stationary sources is NH3-SCR. However, this technique is very costly and suffers from NH3 slip and catalyst instability at higher temperature. Recently, H2-SCR has attracted great attention as a potential technological alternative to NH3-SCR. Further the combustion of H2 produces only water which makes this technique environment-friendly. Most of the past work on H2-SCR is mainly focused on use of Pt and Pd based catalysts supported on different metal oxide supports. However, much less attention has been paid on the support structure (size and morphology), its advancement under reaction conditions and its influence on catalytic performance. It has been found that support has a significant influence on the performance of the catalysts. Recently, PI lab has shown experimentally Pt and Pd supported on different oxide support can dissociate H2 and NOx. However, the NOx conversion and N2 selectivity is not very high in lower temperature range. Therefore, in the proposed project a bimetallic catalyst combining the transition metal and noble metal will be synthesized on ceria support of different morphology. Generally, different CeO2 shapes expose different lattice planes in crystal structures affects the catalytic performance. A systematic study will be performed to first optimize the support configuration. The same support will be used for synthesizing the transition metal based catalyst. Different transition metals of group D like Cu, Ni, Co who shows good hydrogen dissociation capabilities will be used. The performance of transition metal catalyst will be tested in a continuous tubular reactor. Further, a bimetallic catalyst combining transition metal and noble metal will be synthesized. The detailed characterization of all the synthesized catalysts will be performed by using XRD, SEM, TEM, BET, TPR etc. The catalyst performance will be tested to optimize the optimal process conditions like temperature, pressure, GHSV, NO/H2 ratio and metal loading. |