Novel LOHC hydrogenation system and method

Abstract

The invention discloses a novel LOHC hydrogenation system and a novel LOHC hydrogenation method. The system is composed of an LOHC hydrogenation subsystem and a Rankine cycle subsystem, and the LOHC hydrogenation subsystem and the Rankine cycle subsystem are connected through an improved hydrogenation reactor. The LOHC hydrogenation subsystem is used for realizing efficient hydrogenation of LOHC; and the Rankine cycle subsystem is used for generating power by utilizing heat released by hydrogenation reaction. The improved hydrogenation reactor is not only a place where LOHC hydrogenation reaction occurs, but also an evaporator of Rankine cycle. The heat released by the hydrogenation reaction is absorbed and taken away by a working medium, the reaction is always maintained near the optimal temperature, the generated steam drives an expansion machine to drive a generator to operate, and the generated electric energy can be consumed in the system. The method has the advantages of high hydrogenation efficiency, high speed, high overall energy utilization rate, low external energy demand and the like.

Description

technical field [0001] The invention belongs to the field of hydrogen energy, and in particular relates to a novel LOHC hydrogenation system and method. Background technique [0002] As a truly clean fuel, hydrogen is considered to be the key to solving future environmental pollution problems. The production, storage, transportation and use of hydrogen are different from traditional fossil fuels. The limitation of energy density per unit volume makes it difficult to expand its application to the field of transportation, and its long-distance transportation is difficult to be as convenient and efficient as coal and oil. The standard boiling point of hydrogen is much lower than that of natural gas, and the storage and transportation costs of liquid hydrogen are too high, and the problem of hydrogen embrittlement during pipeline transportation is difficult to solve in the short term. LOHC (Liquid Organic Hydrogen Carrier, Liquid Organic Hydrogen Carrier) is a potential hydroge...

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Problems solved by technology

Since the boiling point and thermal decomposition temperature of LOHC are generally low, the heat of reaction is relatively high (~60kJ / mol-H 2 ), at the same time, in order to ensure that the catalyst does not sinter and ensure high hydrogenation rate and conversion rate, the hydrogenation reaction temperature window is generally narrow, and it is difficult to maintain the temperature window

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