Role of Acid Sites in Selective Reduction of NO by Methane over PD-Based Catalysts in Presence of Excess Oxygen

过量氧气存在下，酸性位点在 PD 基催化剂上甲烷选择性还原 NO 中的作用

• 批准号: 9726465
• 负责人: Daniel Resasco
• 金额: $ 26.5万
• 依托单位: University of Oklahoma Norman Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9726465&HistoricalAwards=false
• 关键词: Role; Acid; Sites; Selective; Reduction

ABSTRACT Proposal Title: Role of Acid Sites in the Selective Reduction of NO by Methane over Pd-Based Catalysts in the Presence of Excess Oxygen Proposal Number: CTS-9726465 Principal Investigator Daniel E. Resasco Institution: University of Oklahoma Professor Daniel E. Resasco, from the University of Oklahoma, will investigate various aspects of the selective catalytic reduction of NO with methane in the presence of oxygen, over Pd on acidic supports. This work is of relevance to various environmental concerns: it provides new scientific insights into the catalytic removal of NOx from gases of combustion, it leads to the utilization of methane, it leads to the possibility of burning fuels under leaner (oxygen-rich) conditions, and as a consequence, it allows higher energy efficiency and less generation of CO2 per unit of energy production. Three objectives will be pursued: to determine the role of acidic sites in providing SCR selectivity to Pd supported or exchanged in zeolites or supported on sulfated zirconia; to determine the possible reaction mechanisms kinetically, by infrared spectroscopy of reactants or possible intermediates, and by transient kinetics of isotopically labeled compounds; and to investigate the tolerance of the Pd catalysts during reaction in the presence of water and SO2. The state of Pd will be characterized by x-ray absorption, temperature programmed reduction, electron microscopy, and chemisorption of probe molecules. The acidic sites will be characterized by microcalorimetry and by chemisorption and temperature programmed desorption of weak bases.

摘要 提案标题：酸中心在选择性还原NO中的作用 甲烷在Pd基催化剂上的反应 过量氧气提案编号：CTS-9726465主要研究者丹尼尔E. Resasco院校：俄克拉荷马州大学 丹尼尔教授E.来自俄克拉荷马州大学的Resasco将研究在酸性载体上的钯上，在氧气存在下用甲烷选择性催化还原NO的各个方面。这项工作与各种环境问题有关：它为从燃烧气体中催化去除NOx提供了新的科学见解，它导致甲烷的利用，它导致在贫（富氧）条件下燃烧燃料的可能性，因此，它允许更高的能源效率和每单位能源生产产生更少的CO2。三个目标将追求：确定酸性位点在提供SCR选择性的Pd负载或交换在沸石或负载在硫酸化氧化锆上的作用;确定可能的反应机理动力学，通过反应物或可能的中间体的红外光谱，并通过同位素标记的化合物的瞬态动力学;考察了Pd催化剂在水和SO2存在下的反应耐受性。Pd的状态将通过X射线吸收、程序升温还原、电子显微镜和探针分子的化学吸附来表征。酸性位点将通过微量热法和弱碱的化学吸附和程序升温脱附来表征。