New design approaches to ultra-clean diesel fuels by deep desulfurization and deep dearomatization
New design approaches to ultra-clean diesel fuels by deep desulfurization and deep dearomatization
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DOI：
10.1016/s0926-3373(02)00212-6
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发表时间：
2003-03-10
影响因子：
22.1
通讯作者：
Ma, XL
中科院分区：
文献类型：
--
作者：
Song, C;Ma, XL
本文对烃类燃料，特别是柴油的深度脱硫和深度脱芳（加氢）的设计方法及相关催化和化学进行了选择性的评述。柴油燃料深度脱硫的挑战是难以用常规加氢脱硫工艺除去难降解的硫化合物，特别是4，6-二甲基二苯并噻吩。存在于一些柴油调合原料中的多芳烃和氮化合物对深度HDS的抑制作用加剧了该问题。随着新的环境保护局（EPA）Tier H法规在2006年6月之前将柴油硫从当前的500 ppmw降低到15 ppmw，炼油厂面临着满足燃料硫规格的重大挑战，沿着所需的芳烃含量降低。介绍了现有加氢脱硫工艺的原理和存在的问题，以及各种新方法的概念和优缺点。具体而言，将讨论以下新的脱硫设计方法：（1）常规HDS工艺条件下超深度加氢脱硫的新型催化剂;（2）低温加氢耐硫贵金属催化剂的新设计理念;（3）H2下硫吸附捕集脱硫新工艺;（4）常温无氢选择性吸附脱硫新工艺及相关集成工艺概念;（5）液相氧化脱硫;（6）生物脱硫。(C)2002 Elsevier Science B. V.保留所有权利。
This paper is a selective review on design approaches and associated catalysis and chemistry for deep desulfurization and deep dearomatization (hydrogenation) of hydrocarbon fuels, particularly diesel fuels. The challenge for deep desulfurization of diesel fuels is the difficulty of removing the refractory sulfur compounds, particularly 4,6-dimethyldibenzothiophene, with conventional hydrodesulfurization processes. The problem is exacerbated by the inhibiting effect of polyaromatics and nitrogen compounds, which exist in some diesel blend stocks on deep HDS. With the new Environmental Protection Agency (EPA) Tier H regulations to cut the diesel sulfur from current 500 ppmw down to 15 ppmw by June 2006, refineries are facing major challenges to meet the fuel sulfur specification along with the required reduction of aromatics contents. The principles and problems for the existing hydrodesulfurization processes, and the concepts, advantages and disadvantages of various new approaches will be discussed. Specifically, the following new design approaches for sulfur removal will be discussed: (1) novel catalysts for ultra-deep hydrodesulfurization under conventional HDS process conditions; (2) new design concept for sulfur-tolerant noble metal catalysts for low-temperature hydrogenation; (3) new desulfurization process by sulfur adsorption and capture under H-2; (4) new desulfurization process by selective adsorption at ambient temperature without H-2 and a related integrated process concept; (5) oxidative desulfurization in liquid-phase; and (6) biodesulfurization. (C) 2002 Elsevier Science B.V. All rights reserved.