Oxidesulfurization (ODS) of Petroleum Sulfur Compounds for Simultaneous Reduction of Sulfur Emissions and Production of Valuable Chemicals:A Novel Environmentally Benign Process

该项目的目的是探索在石油原料中发现的各种有机硫化合物的气相氧化磺化（ODS），并将这些化合物升级为有价值的化学产品。同时，对ODS催化有一个基本的了解。初步研究表明，这些有机硫化合物可以选择性地被氧化为有价值的化学中间体（例如，苯酚、马来酸酐和甲醛）。ODS基础科学研究的目标是确定：(1)模型负载金属氧化物催化剂中存在的活性表面位点的分子性质，(2)各种反应所需的表面位点的数量，(3)表面氧化还原、酸性和碱性位点的作用，(4)特定氧化物载体的作用（配体效应），(5)基本动力学和机制，(6)ODS的分子结构-反应性/选择性关系。就更广泛的影响而言，臭氧消耗物质过程提供的优势是：(1)使用自由氧，而不是昂贵的氢气；(2)不需要昂贵的反应器装置来进行甲烷蒸汽重整、水气转换和克劳斯反应；(3)由于次要的非选择性氧化反应途径，大大降低了全球变暖二氧化碳的产量；(4)直接生产可用于炼油厂烷基化过程的硫酸；(5)为生产有价值的化学中间体提供相对便宜的含硫原料。教育方面将是研究生和本科生的指导。因此，从燃料中去除硫的消耗臭氧物质过程是一种潜在的有吸引力的污染控制策略。它是环保的，低排放。

The objective of this project is to explore the vapor-phase oxidesulfurization (ODS) of various organosulfur compounds found in petroleum feedstocks and to upgrade those compounds to valuable chemical products. Simultaneously, a basic understanding of ODS catalysis will be investigated. Preliminary studies have revealed that such organosulfur compounds can be selectively oxidized to valuable chemical intermediates (e.g., phenol, maleic anhydride, and formaldehyde). The objectives of the fundamental scientific ODS studies are to determine the: (1) molecular nature of the active surface sites present in model supported metal oxide catalysts, (2) number of surface sites required for the various reactions, (3) role of surface redox, acidic and basic sites, (4) role of the specific oxide support (ligand effect), (5) fundamental kinetics and mechanisms and (6) molecular structure-reactivity/ selectivity relationships for ODS. In terms of broader impacts, the advantages offered by an ODS process are: (1) the use of free oxygen, rather than expensive hydrogen, (2) eliminates the need for costly reactor units for methane steam reforming, water-gas shift and Claus reactions, (3) production of significantly lower amounts of global warming carbon dioxide due to the minor unselective oxidation reaction pathways, (4) direct production of sulfuric acid that can be used in the alkylation processes in the petroleum refinery and (5) a supply of relatively inexpensive sulfur-containing feedstocks for the production of valuable chemical intermediates. The educational aspect will be the mentoring of graduate and undergraduate students. Thus, an ODS process to remove sulfur from fuels is a potentially attractive pollution control strategy. It is environmentally benign with low emissions.