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Biodiesel has been thought to be a good alternative to petroleum fuel and is receiving increasing attention throughout the whole world. The feedstocks for biodiesel are usually from vegetable oils and animal fats, among which vegetable oils such as soybean oil, peanut oil, and cottonseed oil are widely used, but most of these oils are edible. At present, the primary obstacle for biodiesel commercialization is the high feedstock cost, which is reported over 85% of total biodiesel production cost. Recently, Researchers are looking forward to new raw materials,especially non-edible materials for biodiesel production .Zanthoxylum bungeanum is widely distributed in most parts of China. Z. bungeanum seed has an estimated annual production potential of one million metric tons in China and most of seeds are used as muck or wasted. Accordingly, Z. bungeanum seed oil(ZSO) is a potential cheap feedstock for biodiesel production compared with refined and edible-grade vegetable oils.However, the color of ZSO usually takes on snuff color, filemot, deep filemot and carmine, especially for acid value exceeding 40, it was because of the impurity of pectin, phosphorus grease, albumen and waxiness included in ZSO. Therefore, in order to make use of ZSO, decoloration is necessary step for treating rough oil. Chemical oxidation decoloration was one of methods, this paper studied the peroxide oxidation decoloration. The report on decoloration of ZSO is very few till now. |
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南京工大
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| 生物柴油一直以来被认为是化石燃料的一种合适替代品，并引起了全世界的广泛关注。生物柴油的原料通常来源于植物油以及动物脂肪等，其中大豆油、花生油、棉花籽油等得到了广泛的应用。但是，这些油中绝大多数都是可以食用的，由此导致了当前生物柴油商业化的主要障碍，即原料的高成本。通常原料成本要占总生产费用的85%。研究者们期待找到一种新的原材料，特别是一种不可食用的材料来进行生物柴油的生产。花椒在中国绝大多数地区都有分布，花椒籽的年生产潜力能够达到100万吨，但是绝大多数的花椒籽都被作为肥料或者被丢弃。由此可见，与精炼的可食用植物油相比，花椒籽油（ZSO）有潜力成为生物柴油低成本生产的原料。但是，花椒籽油的颜色通常是黄褐色、枯叶色、深枯叶色以及深红色的，特别是当酸值超过40的时候颜色更深，这是由于花椒籽油中含有的果胶、磷脂、胚乳及蜡质等不纯物导致的。因此，为了更好的利用花椒籽油，脱色是原油处理中的必须步骤。化学氧化脱色是脱色方法中的一种，本文研究了过氧化脱色。有关花椒籽油脱色的报导至今数量很少。 |
2楼2013-04-22 22:17:12