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Method for preparing alkanes by hydrodeoxygenation of non-edible animal and vegetable oils
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An animal and vegetable oil, hydrodeoxygenation technology, which is applied in the preparation of liquid hydrocarbon mixture, petroleum industry, biological raw materials, etc., can solve the problems of non-edible animal and vegetable oil not being used, limiting large-scale application, and high production cost, and achieving favorable Large-scale promotion and application, good selectivity and hydrothermal resistance, and low cost
Active Publication Date: 2015-09-23
PETROCHINA CO LTD
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[0005] Using renewable substances as raw materials, hydrogenation and deoxygenation to prepare green alkanes as fuel for internal combustion engines has attracted the attention of scholars from various countries. Patents EP1728844A1 (using edible soybean oil as raw material), CN101842465A (using edible soybean oil as raw material, high reaction pressure) , CN101326267A (with edible soybean oil as raw material, higher reaction pressure, noble metal Pd catalyst) and other reported hydrodeoxygenation to prepare alkane biomass raw material is mainly edible grade vegetable oil, and the reaction pressure is higher, using noble metal as the hydrodeoxygenation catalyst active components, which makes the production cost higher, and the waste non-edible animal and vegetable oils are not well utilized, which limits the large-scale application in industry
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Embodiment 1
[0011] Preparation of Alkanes by Hydrodeoxygenation of Jatropha Oil
[0012] Put 10mL nickel-molybdenum catalyst containing 3~5wt% cerium oxide and silicon oxide into the constant temperature section of the reactor. In the presence of n-octane solvent, 380°C, 4.0MPa, 5.0h -1 , Hydrogen / jatropha oil 1000, reacted for 10 hours, analyzed the product qualitatively and quantitatively by GC-MS, the yield of liquid hydrocarbons was 82.23%, and the yield of C15~C18 alkanes was 80.21%.
Embodiment 2
[0014] Preparation of alkanes by hydrodeoxygenation of non-food grade palm oil
[0015] Put 10mL of nickel-molybdenum catalyst containing 3~5wt% cerium oxide and silicon oxide into the constant temperature section of the reactor, fill the upper and lower sections of the reactor with absorbent cotton and quartz sand, replace with nitrogen three times, and use non-edible grade palm oil as raw material , in the presence of n-octane solvent, 360°C, 3.5MPa, 5.0h -1 , Hydrogen / non-edible grade palm oil 1000, react for 10 hours, conduct qualitative and quantitative analysis of the product by GC-MS, the yield of liquid hydrocarbons is 82.56%, and the yield of C15~C18 alkanes is 79.56%.
Embodiment 3
[0017] Production of Alkanes by Hydrodeoxygenation of Waste Oil
[0018] Put 10mL nickel-molybdenum catalyst containing 3~5wt% cerium oxide and silicon oxide into the constant temperature section of the reactor. In the presence of octane solvent, 380°C, 4.0MPa, 4.5h -1 , Hydrogen / waste oil 900, react for 10 hours, conduct qualitative and quantitative analysis of the product by GC-MS, the yield of liquid hydrocarbons is 82.17%, and the yield of C15~C18 alkanes is 78.69%.
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Abstract
The invention relates to a method for preparing alkanes by hydrodeoxygenation of non-edible animal and vegetable oil. The method comprises the following steps: loading 5-10mL of nickel-molybdenum catalyst containing 3-5wt% of cerium oxide and silicon oxide into a constant-temperature section of a reactor, well filling an upper section and a lower section of the reactor by using an inert material, replacing air with nitrogen three times, and performing hydrodeoxygenation reaction on the non-edible animal and vegetable oil as raw materials in the presence of a hydrocarbon type solvent under the conditions that the reaction temperature is 200-500 DEG C, the pressure is 1.0-6.0MPa, the air speed is 0.5-10h<-1> and the hydrogen-oil volume ratio is 200-2000 to prepare the alkanes taking C15-C18 as main components, wherein the non-edible animal and vegetable oil mainly comprises fatty acid glycerides of C9-C24, and the catalyst is a conventional nickel-molybdenum hydrodeoxygenation catalyst added with 3-5wt% of cerium oxide and silicon oxide in equal weight ratio. The raw materials used in the method are non-edible oil, and the cost is low; the process is simple, and no byproducts are produced; fatty acid carbon chains keep lengths of the original carbon chains; the products are stable, high in calorific value, green and renewable.
Description
technical field [0001] The invention relates to a method for preparing alkanes by hydrodeoxygenation of non-edible animal and vegetable oils. Non-edible animal and vegetable oils which do not compete with others for food are used as raw materials, and renewable alkanes are prepared by hydrodeoxygenation under the action of a high-performance non-noble metal hydrodeoxygenation catalyst Methods. Background technique [0002] With the development of the world economy and the increasing consumption of petroleum resources, energy shortage has become a major problem affecting the sustainable development of human society. Due to its abundant reserves, environmental friendliness and renewable characteristics, while meeting the energy needs of the future society, bioenergy is also in line with the concept of sustainable scientific development and circular economy. " pointed out that by 2015, the current consumption of biomass energy will increase from about 2% of total energy consum...
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