Method and device for preparing hydrocarbon-rich bio-oil by grading and upgrading biomass

• Main Authors: CHEN WEI, HUANG KAIQIANG, XU SHAOPING, ZHAO YANLING, XIAO YAHUI, LIU SHENG, LI XIYING, LIU YONG, MAO LIQUN
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CRACKING HYDROCARBON OILS; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention provides a method and a device for preparing hydrocarbon-rich bio-oil by graded upgrading of biomass. The method comprises the following steps: heating and catalyzing the biomass by using a solid heat carrier serving as a primary upgrading catalyst so as to perform pyrolysis and ketolation and aldol condensation reaction of a primary pyrolysis gaseous product; the bio-oil yield is improved; meanwhile, dust, alkali metal and alkaline earth metal in a primary pyrolysis gaseous product are adsorbed and captured; the method also comprises the step of continuously deoxidizing and reforming the gaseous product subjected to primary catalytic upgrading into a high-octane hydrocarbon compound by using a solid heat carrier serving as a secondary upgrading catalyst, so that the quality of the bio-oil is improved. According to the method, two upgrading catalysts with different catalytic effects are used as solid heat carriers at the same time, so that biomass pyrolysis and graded upgrading are achieved, the