Gutter oil, bio-diesel and bio-diesel produced from gutter oil
Li, Hongen (2021)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2021092117922
https://urn.fi/URN:NBN:fi:amk-2021092117922
Tiivistelmä
The rapid development of national economy and the growth of population promote the rapid development of energy. The rapid development of energy will lead to serious energy problems and environmental pollution. The development of bio-diesel energy is of great significance to the current global energy structure reform, petroleum safety, transportation industry development, national economic construction, agricultural industrial structure adjustment and environmental protection. In the process of preparing biological organisms, raw materials are the most critical link, and gutter oil is one of the good raw materials. Gutter oil has complex composition, many impurities and high acid value, so it must be pretreated before the preparation of bio-diesel. Pretreatment of gutter oil has become a prerequisite for the preparation of bio-diesel. This thesis work mainly studies and introduces two mature methods in the process of bio-diesel production from gutter oil. They are respectively transesterification reaction method, special transesterification: microwave irradiation technology and hydrogenation and deoxygenation technology.
The transesterification method introduced in this thesis is to catalyze the esterification of gutter oil with low carbon alcohols such as methanol and ethanol under the condition of strong acid or strong base. The corresponding fatty acid methyl ester and ethyl ester, bio-diesel, were synthesized. Because this method is easy to control the reaction conditions, the process flow and technology are relatively mature. So it is the most commonly used method at present and can make the bio-diesel industry. However, the catalyst can only be used once. In order to improve these problems, microwave irradiation technology is introduced in this thesis. It is a more effective method to produce bio-diesel from gutter oil. Microwave irradiation can provide powerful power to reach the reaction temperature in a short time. SrO catalysts can be used in this process. This is a heterogeneous catalyst that is insoluble in any liquid solution and can be recycled. Another method is hydrogenation and deoxygenation. C15 ~ C18 straight-chain diesel alkanes, namely the second generation bio-diesel, were prepared from gutter oil by hydrogenation and deoxidation. In addition to two production methods of bio-diesel, gutter oil and bio-diesel were introduced in this paper, and the development prospect and existing advantages of bio-diesel were evaluated.
The transesterification method introduced in this thesis is to catalyze the esterification of gutter oil with low carbon alcohols such as methanol and ethanol under the condition of strong acid or strong base. The corresponding fatty acid methyl ester and ethyl ester, bio-diesel, were synthesized. Because this method is easy to control the reaction conditions, the process flow and technology are relatively mature. So it is the most commonly used method at present and can make the bio-diesel industry. However, the catalyst can only be used once. In order to improve these problems, microwave irradiation technology is introduced in this thesis. It is a more effective method to produce bio-diesel from gutter oil. Microwave irradiation can provide powerful power to reach the reaction temperature in a short time. SrO catalysts can be used in this process. This is a heterogeneous catalyst that is insoluble in any liquid solution and can be recycled. Another method is hydrogenation and deoxygenation. C15 ~ C18 straight-chain diesel alkanes, namely the second generation bio-diesel, were prepared from gutter oil by hydrogenation and deoxidation. In addition to two production methods of bio-diesel, gutter oil and bio-diesel were introduced in this paper, and the development prospect and existing advantages of bio-diesel were evaluated.