Michael McMurray
Executive Vice President and Chief Financial Officer at LyondellBasell Industries
Thank you, Peter, and good morning, everyone.
Please turn to Slide 8, and let me begin by highlighting our excellent cash generation from our business portfolio during 2022. LyondellBasell generated a total of $6.1 billion of cash from operating activities over the past year. Our cash on hand increased to $2.2 billion at the end of the fourth quarter.
During 2022, we achieved a cash conversion of 96%, 13 percentage points higher than our 2021 cash conversion. In the fourth quarter, cash conversion reached an outstanding rate of 203%. This efficient and robust cash generation allowed the Company to return a total of $3.7 billion to LyondellBasell shareholders in 2022.
Let's continue with Slide 9 and review the details of our capital allocation over the past year. Our approach remains focused on disciplined capital allocation and strong returns for our shareholders. During 2022, cash from operating activities fully funded dividends, share repurchases and capital expenditures. We returned approximately 60% of the cash from operating activities to shareholders. This included $3.2 billion in quarterly and special dividends and $420 million in share repurchases. In May, we increased our quarterly dividend by 5%. This represents our 12th consecutive year of annual dividend growth.
We continue to invest in maintenance and growth projects with $1.9 billion in capital expenditures. A significant portion of this capital funded the final stages of construction of our world-scale PO/TBA plant. Startup activities remain on track for the end of this quarter. Our transformation office is working across our Company to rigorously manage and track the progress of our value enhancement program. We look forward to sharing the progress of this program at our Capital Markets Day in March.
Now, I'd like to provide an overview of the quarterly results for each of our segments on Slide 10. LyondellBasell's business portfolio delivered $865 million of EBITDA during the fourth quarter. Our results reflected margins stabilizing at the low levels seen towards the end of the third quarter.
Moderating energy and feedstock costs provided modest offsets for compressed margins in our olefins and polyolefins businesses. Overall, OMP demand remained low, particularly in Europe and China. Intermediates and derivatives results sequentially declined on lower volumes due to the quarterly timing of oxyfuel vessel shipments. Margins in our oxyfuels and Refining businesses remained above historical averages as demand for fuels remained strong due to increasing global mobility. High costs for utilities and raw materials coupled with low seasonal demand negatively impacted our Advanced Polymer Solutions segment.
Across the portfolio, a non-cash LIFO inventory valuation charge impacts pre-tax fourth quarter results by approximately $90 million. Fourth quarter LIFO charges were approximately $15 million for O&P Americas segment, $50 million for the O&P-EAI segment, $25 million each for the intermediates and derivatives in APS segments, $15 million for the Technology segment and a $40 million benefit for the Refining segment.
As a reminder, volatility in natural gas prices impacts our cost for not only gas but also steam and electricity. We estimate that a $1 per million BTU change in the price of natural gas impacts the energy cost of our directly operated assets by approximately $175 million per year across the Company with 80% of this impact in North America and 20% in Europe. These estimates do not include the impact of gas price on feedstock cost.
Before I turn the call over to Ken and then to each of our business leaders, who will describe our segment results in more detail, let me address some of your annual modeling questions for 2023 on Slide 11. As our new world-scale PO/TBA plant ramps up, we expect to produce and sell about half of the asset's nameplate capacity in 2023.
We remain confident that our value enhancement program can achieve a recurring annual EBITDA of $150 million by the end of 2023 through the execution of about 1,000 projects. In order to achieve this benefit, we expect to incur a similar amount of one-time capital and operational cost of about $150 million, with the majority of these costs allocated to capital.
Major planned maintenance for 2023 included a turnaround at one of our Midwest ethylene crackers in the O&P Americas segment, turnarounds at our acetyls assets and three propylene oxide plant turnarounds within our I&D segment. Based on expected volumes and margins, we estimate that lost production associated with all of this maintenance downtime will impact 2023 EBITDA by approximately $290 million. While routine maintenance costs are expensed, maintenance costs arising from turnarounds at major production units are capitalized and included in our capital expenditure forecast.
During the fourth quarter, we recognized costs related to the exit from our Refining business, which impacted EBITDA by $73 million. As I mentioned last quarter, we expect the business will incur similar EBITDA impacts during each quarter of 2023. We will also recognize about $55 million each quarter for depreciation charges to reflect cost accrued for asset decommissioning that will be incurred after the asset shuts down.
We expect that our capital expenditures will decline by about $300 million to approximately $1.6 billion this year with the completion of the PO/TBA plant and disciplined spend resulting from the current business environment. Approximately $500 million of capex is targeted toward profit-generating growth projects with the remaining balance supporting sustaining maintenance. We expect that this year's capital requirements for the value enhancement program will be funded within our $1.6 billion capex budget.
Other financial metrics worth noting include net interest expense, depreciation and amortization, pension-related estimates and tax rates. We expect 2023 net interest expense will be approximately $405 million. Depreciation and amortization charges for 2023 are expected to be $1.4 billion, which includes the $220 million of additional refinery depreciation charges related to asset decommissioning. We plan to make regular pension contributions in 2023, totaling about $65 million with approximately $105 million of pension expense for the year. We expect our effective tax rate will be approximately 20% and our cash tax rate will be lower than our ETR.
With that, I'll turn the call over to Ken. Ken?