Abstract: A device and method for integrated production of an aviation fuel and a porous carbon by biomass pyrolysis with graded catalytic activation are provided. The device includes a catalytic pyrolysis bond-cleaving unit, a pyrolysis gas reforming unit, and an oxygen-rich carbon material activating unit. With the coupling of the three units, the biomass is firstly subjected to pyrolysis, catalytic bond cleavage and preliminary deoxygenation to enable the highly active oxygen-containing macromolecules to be enriched into a micromolecular thermally-stable intermediate matching the pores of the reforming catalyst, and then the intermediate is prepared into an aviation fuel precursor by catalytic reforming; the non-condensable gas generated in the pyrolysis and reforming process is used to activate the biochar to prepare an oxygen-rich porous carbon material and generate a hydrogen-rich gas, so that the hydrogen-rich gas enters the catalytic pyrolysis fluidized bed for participation in bond cleavage and deoxygenation.

Abstract: Provided are an oxygen-vacancy-rich MoOx/ZrO2 catalyst and a preparation method and its application in hydrodeoxygenation of a biomass gas-solid system. The method includes the following steps: (1) dissolving zirconyl nitrate and ammonia water in de-ionized water respectively and then mixing fully and performing aging, cooling, filtering, washing and drying to obtain a solid powder and calcining the solid powder to obtain ZrO2 solid; (2) adding ammonium molybdate tetrahydrate into de-ionized water for dissolution, stirring and dropwise adding into the ZrO2 solid, and mixing to make loading uniform, and then drying to obtain a solid, and then grinding and calcining the solid to obtain MoOx/ZrO2 powder; (3) adding a Pt precursor into de-ionized water for dissolution, and dropwise adding into the MoOx/ZrO2 powder and stirring to make loading uniform, and then drying to obtain a solid, and then grinding and calcining the solid to obtain the Pt—MoOx/ZrO2 catalyst.

Abstract: Disclosed herein are a Cas12i polypeptide and use thereof in a CRISPR-Cas system. Specifically disclosed herein are a Cas12i polypeptide, a Cas12i fusion polypeptide, a guide RNA, a complex formed by the Cas12i polypeptide or fusion polypeptide with the guide RNA, a nucleic acid, a vector, a vector system, a delivery system, a kit, a composition, and a method for modifying a nucleic acid using the components described above.

Abstract: Provided are an oxygen-vacancy-rich MoOx/ZrO2 catalyst and a preparation method and its application in hydrodeoxygenation of a biomass gas-solid system. The method includes the following steps: (1) dissolving zirconyl nitrate and ammonia water in de-ionized water respectively and then mixing fully and performing aging, cooling, filtering, washing and drying to obtain a solid powder and calcining the solid powder to obtain ZrO2 solid; (2) adding ammonium molybdate tetrahydrate into de-ionized water for dissolution, stirring and dropwise adding into the ZrO2 solid, and mixing to make loading uniform, and then drying to obtain a solid, and then grinding and calcining the solid to obtain MoOx/ZrO2 powder; (3) adding a Pt precursor into de-ionized water for dissolution, and dropwise adding into the MoOx/ZrO2 powder and stirring to make loading uniform, and then drying to obtain a solid, and then grinding and calcining the solid to obtain the Pt—MoOx/ZrO2 catalyst.

Abstract: The provided is a novel heat-induction decoking device and method tailored for the thermal conversion of solid fuels. The efficient heat-induction decoking device for the thermal conversion of the solid fuels includes: a decoking tank body, which is configured to condense a macromolecular tar in a pyrolysis gas and discharge the condensed tar from a bottom to a tar tank for storage; an electromagnetic induction heating system, which is disposed on an outer wall surface of the decoking tank body to heat the outer wall surface of the decoking tank body; an ultrasonic vibration decoking system, which is disposed on the decoking tank body to enable the decoking tank body to generate vibration by ultrasonic wave so as to enhance tar fluidity. This innovative design not only reduces energy consumption and equipment wear but also extends system operational lifespan, thereby offering substantial improvements in economic and environmental sustainability.

Abstract: Disclosed herein are a Cas12i polypeptide and use thereof in a CRISPR-Cas system. Specifically disclosed herein are a Cas12i polypeptide, a Cas12i fusion polypeptide, a guide RNA, a complex formed by the Cas12i polypeptide or fusion polypeptide with the guide RNA, a nucleic acid, a vector, a vector system, a delivery system, a kit, a composition, and a method for modifying a nucleic acid using the components described above.

Abstract: The provided is a novel heat-induction decoking device and method tailored for the thermal conversion of solid fuels. The efficient heat-induction decoking device for the thermal conversion of the solid fuels includes: a decoking tank body, which is configured to condense a macromolecular tar in a pyrolysis gas and discharge the condensed tar from a bottom to a tar tank for storage; an electromagnetic induction heating system, which is disposed on an outer wall surface of the decoking tank body to heat the outer wall surface of the decoking tank body; an ultrasonic vibration decoking system, which is disposed on the decoking tank body to enable the decoking tank body to generate vibration by ultrasonic wave so as to enhance tar fluidity. This innovative design not only reduces energy consumption and equipment wear but also extends system operational lifespan, thereby offering substantial improvements in economic and environmental sustainability.