Impact of catalyst and feed properties on the fouling and deactivation of naphtha hydrotreater catalysts

催化剂和进料特性对石脑油加氢处理催化剂结垢和失活的影响

• 批准号: 427913-2011
• 负责人: Smith, Kevin
• 金额: $ 3.21万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=552290
• 关键词: Impact; catalyst; feed; properties; fouling

About 1 million barrels per day (bpd) of oil equivalent is currently produced from Canada's oilsands and this is expected to reach 3 million bpd by 2020. Oilsands consist of bitumen, sand and water. The bitumen is separated from the sand and water before being upgraded to a synthetic crude oil. Upgrading the bitumen by coking yields liquid products that must be treated over a catalyst in the presence of hydrogen to remove S, N and other contaminants. The naphtha fraction of the liquid product, with boiling point < 177C, also contains significant quantities of olefins and diolefins that are stabilized by a low temperature (< 250C) catalytic hydrogenation before S and N removal. Although highly reactive, diolefins can be difficult to saturate and may undergo a polymerization reaction that results in carbon deposition on the catalyst. This leads to a rapid build-up of pressure drop in the reactor that ultimately results in early shut-down of the unit.

目前，加拿大的油砂产量约为100万桶/天，预计到2020年将达到300万桶/天。油砂由沥青、沙子和水组成。沥青从沙子和水中分离出来，然后升级为合成原油。通过焦化来升级沥青产生的液体产品必须在氢气存在的催化剂上进行处理，以去除S， N和其他污染物。液态产物的石脑油馏分沸点< 177C，还含有大量的烯烃和二烯烃，在去除S和N之前通过低温（< 250C）催化加氢稳定。虽然反应性很强，但二烯烃很难饱和，并可能发生聚合反应，导致碳沉积在催化剂上。这将导致反应堆内压降迅速累积，最终导致机组提前关闭。