据能源世界网8月12日报道，据知情人士透露，美国石油巨头埃克森美孚公司（Exxon Mobil Corp.）和雪佛龙公司（Chevron Corp.）正寻求用现有设施生产新兴可再生燃料，从而扩大新兴可再生燃料的规模。
这两家美国最大的石油公司希望生产可持续的燃料，而不是像一些炼油厂那样花费数十亿美元来重新配置操作以生产此类产品。可再生燃料占美国燃料消耗的5%，但随着各个行业采取措施减少整体碳排放，以应对全球气候变化，可再生燃料的消费量还将继续增长。
雪佛龙和埃克森美孚都拥有庞大的炼油部门，这对他们的整体碳排放量做出了重大贡献。与欧洲竞争对手荷兰皇家壳牌公司和道达尔（TotalEnergies）相比，这些公司因对可再生能源投资采取的措施不那么紧迫而受到批评，并且与这些公司相比，他们在“绿色”技术上的资本支出比例通常较低。
这两家公司正在研究如何在不显著增加资本支出的情况下，对植物油和用石油馏分加工的生物燃料等生物基原料进行加工，以生产可再生柴油、可持续航空燃料(SAF)和可再生汽油。
除非加上税收抵免，否则可再生燃料的商业化生产比传统汽车汽油的生产成本更高。
据消息人士称，应埃克森美孚的要求，国际标准和测试组织ASTM international成立了一个工作组，以确定炼油厂联合加工高达50%的特定类型生物原料以生产SAF的能力。
埃克森美孚没有回应记者的置评请求。
雪佛龙正在研究如何通过他们的流化催化裂化装置（FCC）来加工这些原料。流化催化裂化装置是汽油生产装置，通常是炼油设施的最大组成部分。
雪佛龙的一名发言人告诉路透社称，我们的目标是到2021年底在FCC中共同加工生物原料，以向南加州的消费者供应可再生产品。
该公司正与美国环境保护署（EPA）和加州空气资源委员会（CARB）合作，开发一种生产符合排放信用的燃料的方法。
郝芬 译自 能源世界网
原文如下：
Exxon, Chevron look to make renewable fuels without costly refinery upgrades: Sources
U.S. oil major Exxon Mobil Corp, along with Chevron Corp, is seeking to bulk up in the burgeoning renewable fuels space by finding ways to make such products at existing facilities, sources familiar with the efforts said.
The two largest U.S. oil companies want to produce sustainable fuels without ponying up billions of dollars that some refineries are spending to reconfigure operations to make such products. Renewable fuels account for 5% of U.S. fuel consumption, but are poised to grow as various sectors adapt to cut overall carbon emissions to combat global climate change.
Both Chevron and Exxon have massive refining divisions that contribute heavily to their overall carbon emissions. The companies have been criticized for a less urgent approach to renewable investments than European rivals Royal Dutch Shell Plc and TotalEnergies, and have generally spent a lower percentage of their capital than those companies on "green" technologies.
The companies are looking into how to process bio-based feedstocks like vegetable oils and partially-processed biofuels with petroleum distillates to make renewable diesel, sustainable aviation fuel (SAF) and renewable gasoline, without meaningfully increasing capital spending.
Commercial production of renewable fuels is costlier than making conventional motor gasoline unless coupled with tax credits.
A task force was created at Exxon's request within international standards and testing organization ASTM International to determine the capability of refiners to co-process up to 50% of certain types of bio-feedstocks to produce SAF, according to the sources.
Exxon did not respond to a request for comment.
Chevron is looking into how to run those feedstocks through their fluid catalytic crackers (FCC), gasoline-producing units that are generally the largest component of refining facilities.
"Our goal is to co-process biofeedstocks in the FCC by the end of 2021," a Chevron spokesperson told Reuters, to supply renewable products to consumers in Southern California.
The company is partnering with the U.S. Environmental Protection Agency (EPA) and California Air Resources Board (CARB) to develop a path to produce fuel that would qualify for emissions credits.
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