Integration of bioproducts and pulp production in a BCTMP mill

BCTMP 工厂中生物产品和纸浆生产的整合

• 批准号: 355391-2011
• 负责人: Yuan, Zhirun
• 金额: $ 1.53万
• 依托单位: University of New Brunswick
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=637783
• 关键词: Integration; bioproducts; pulp; production; BCTMP

Bleached chemi-thermomechanical pulp (BCTMP) has been increasingly used in papers as a cost-effective way to improve product performance. Canada produces over 70% of the world's market BCTMP and most of them are exported to Europe and Asia. However, the Canadian BCTMP producers are now facing strong competition from low-cost producers in the world and need to develop new technologies to increase their revenue and/or reduce production cost in order to stay competitive. Pre-extraction of hemicelluloses for bioproducts may provide additional revenue to a BCTMP mill. The extracted flows from hardwood BCTMP mills can be rich in hemicelluloses, thereofre, providing opportunities to pre-extract and convert these extracts into value-added bioproducts before making pulp. The chemical pre-treatment stage of a BCTMP process can easily be served as the pre-extraction stage without major capital investment. Earlier studies by the author et al. have shown that acid pre-extraction before the normal BCTMP process can reduce production cost by significantly reducing the refining energy. Pulp bulk and surface properties are not affected but brightness and strength are reduced. Therefore, work is required to investigate ways to maximize the extraction efficiency while minimizing the loss of brightness and strength during the pre-extraction stage. The extraction efficiency and impact on pulp properties with various chemicals in pre-extraction have not been studied for a BCTMP process. There are also challenges such as how to concentrate/separate/purify the hemicelluloses from the dilute stream. The present program addresses these needs and will aim to develop and implement new technologies/bioproducts for the Canadian BCTMP companies, therefore, increasing their competitiveness by providing new revenues and reducing production cost. What acquired from this study could also be applied to the thermomechanical pulp mills that are facing a significant downturn of the demand for paper advertising.

漂白化学热机械浆 (BCTMP) 作为一种提高产品性能的经济有效的方法，越来越多地用于纸张中。加拿大生产的BCTMP占全球市场70%以上，其中大部分出口到欧洲和亚洲。然而，加拿大 BCTMP 生产商现在面临着来自世界各地低成本生产商的激烈竞争，需要开发新技术来增加收入和/或降低生产成本，以保持竞争力。用于生物产品的半纤维素的预提取可以为 BCTMP 工厂提供额外的收入。从硬木 BCTMP 工厂提取的流可能富含半纤维素，因此，提供了在制造纸浆之前预提取并将这些提取物转化为增值生物产品的机会。 BCTMP 工艺的化学预处理阶段可以轻松用作预萃取阶段，无需大量资本投资。作者等人的早期研究。研究表明，在正常的 BCTMP 工艺之前进行酸预萃取可以通过显着降低精炼能耗来降低生产成本。纸浆松厚度和表面性能不受影响，但亮度和强度降低。因此，需要研究如何最大限度地提高提取效率，同时最大限度地减少预提取阶段亮度和强度的损失。尚未研究 BCTMP 工艺的提取效率以及预提取中各种化学品对纸浆特性的影响。还存在一些挑战，例如如何从稀流中浓缩/分离/纯化半纤维素。目前的计划满足了这些需求，旨在为加拿大 BCTMP 公司开发和实施新技术/生物产品，从而通过提供新收入和降低生产成本来提高其竞争力。从这项研究中获得的成果也可以应用于面临纸张广告需求大幅下滑的热机械纸浆厂。