Europe is the most important consumer market for biodiesel in the world. Every year, biodiesel is imported from all over the world, and with the support of the EU's double emission reduction policy, biodiesel processed from waste oil has a certain competitive advantage. As a country with a large population and a large oil consumer, China has a large output of waste oil, which is a key area for fuel merchants and traders.

However, the EU standard (EN14214) is the highest standard for biodiesel in the world. The domestic industry’s key indicators, especially sulfur content, have not yet fully reached the EU standards, which has adversely affected the export of biodiesel to the EU.

Ultra-low sulfur system

The sulfur in the biodiesel system includes: mercaptans, sulfides, disulfides, thiophenes, benzothiophenes, dibenzothiophenes, alkyl dibenzothiophenes, etc., which are characterized by diversity and stubbornness. In view of this, the company has combined basic research and engineering applications to carry out major research projects. Successfully developed a "point cohesion, surface coupling" ultra-low sulfur methyl ester distillation system. The system obtains ultra-low sulfur biodiesel through the strategy of "targeted conversion, dimensionality reduction and removal". The sulfur content index is in full compliance with EU standards, which provides precise assistance for domestic biodiesel exports to the EU. The implementation measures of the system are as follows:

(1) Functional cohesion and content coupling. Use workstations to perform multi-state simulations to obtain precise parameters and develop proprietary tower internals and packings, both soft and hard, to ensure strong protection.

(2) Sequence cohesion and control coupling. Multi-dimensional analysis of the physical properties of sulfur and methyl esters, multi-effect balanced distillation, system linkage, and obvious effects.

(3) Functional cohesion, marking coupling. The stubborn organic sulfur body is catalyzed to transform the form, and the bottom layer is decomposed, immediately.