By Ron Bousso LONDON (Reuters) -Shell will shut down its oil refinery in Wesseling, Germany by 2025 and convert the site to produce lubricant feedstock as part of its drive to reduce its carbon emissions, the company said on Friday. Shell said it will convert the site’s hydrocracker unit into a production unit for Group III base oils, used mostly in engines, with capacity of about 300,000 metric tons a year, equivalent to about 9% of current EU demand and 40% of Germany’s demand for base oils. The move is expected to reduce Shell’s operational carbon emissions, known as Scope 1 and 2 emissions…